Misplaced Pages

#798201

132-432: Jarisch–Herxheimer reactions can be life-threatening because they can cause a significant drop in blood pressure and cause acute end-organ injury, eventually leading to multi-organ failure. It comprises part of what is known as sepsis and occurs after initiation of antibacterials when treating Gram-negative infections such as Escherichia coli and louse- and tick-borne infections. It usually manifests in 1–3 hours after

264-725: A decreased level of consciousness . Bacterial and viral cases of pneumonia usually result in similar symptoms. Some causes are associated with classic, but non-specific, clinical characteristics. Pneumonia caused by Legionella may occur with abdominal pain, diarrhea , or confusion. Pneumonia caused by Streptococcus pneumoniae is associated with rusty colored sputum. Pneumonia caused by Klebsiella may have bloody sputum often described as "currant jelly". Bloody sputum (known as hemoptysis ) may also occur with tuberculosis , Gram-negative pneumonia, lung abscesses and more commonly acute bronchitis . Pneumonia caused by Mycoplasma pneumoniae may occur in association with swelling of

396-448: A focus of infection and reduce conditions favorable to microorganism growth or host defense impairment, such as drainage of pus from an abscess . It is one of the oldest procedures for control of infections, giving rise to the Latin phrase Ubi pus, ibi evacua , and remains important despite the emergence of more modern treatments. Early goal directed therapy (EGDT) is an approach to

528-516: A leading cause of death in developing countries, and also among the very old, the very young, and the chronically ill. Pneumonia often shortens the period of suffering among those already close to death and has thus been called "the old man's friend". People with infectious pneumonia often have a productive cough , fever accompanied by shaking chills , shortness of breath , sharp or stabbing chest pain during deep breaths, and an increased rate of breathing . In elderly people, confusion may be

660-401: A stethoscope or increased respiratory rate. Grunting and nasal flaring may be other useful signs in children less than five years old. Lack of wheezing is an indicator of Mycoplasma pneumoniae in children with pneumonia, but as an indicator it is not accurate enough to decide whether or not macrolide treatment should be used. The presence of chest pain in children with pneumonia doubles

792-520: A PAMP and a PRR will cause a series of intracellular signalling cascades. Consequentially, transcription factors such as nuclear factor-kappa B and activator protein-1 , will up-regulate the expression of pro-inflammatory and anti-inflammatory cytokines. Upon detection of microbial antigens , the host systemic immune system is activated. Immune cells not only recognise pathogen-associated molecular patterns but also damage-associated molecular patterns from damaged tissues. An uncontrolled immune response

924-628: A change in the risk of death with etomidate. Paralytic agents are not suggested for use in sepsis cases in the absence of ARDS , as a growing body of evidence points to reduced durations of mechanical ventilation , ICU and hospital stays. However, paralytic use in ARDS cases remains controversial. When appropriately used, paralytics may aid successful mechanical ventilation, however, evidence has also suggested that mechanical ventilation in severe sepsis does not improve oxygen consumption and delivery. Source control refers to physical interventions to control

1056-418: A chest radiograph is recommended. Findings do not always match the severity of disease and do not reliably separate between bacterial and viral infection. X-ray presentations of pneumonia may be classified as lobar pneumonia , bronchopneumonia , lobular pneumonia , and interstitial pneumonia . Bacterial, community-acquired pneumonia classically show lung consolidation of one lung segmental lobe , which

1188-493: A cough of longer duration, and pulmonary emboli present with acute onset sharp chest pain and shortness of breath. Mild pneumonia should be differentiated from upper respiratory tract infection (URTI). Severe pneumonia should be differentiated from acute heart failure . Pulmonary infiltrates that resolved after giving mechanical ventilation should point to heart failure and atelectasis rather than pneumonia. For recurrent pneumonia, underlying lung cancer, metastasis , tuberculosis,

1320-479: A cough or difficulty breathing and a rapid respiratory rate, chest indrawing, or a decreased level of consciousness. A rapid respiratory rate is defined as greater than 60 breaths per minute in children under 2 months old, greater than 50 breaths per minute in children 2 months to 1 year old, or greater than 40 breaths per minute in children 1 to 5 years old. In children, low oxygen levels and lower chest indrawing are more sensitive than hearing chest crackles with

1452-457: A cough with pneumonia , or painful urination with a kidney infection . The very young, old, and people with a weakened immune system may have no symptoms of a specific infection, and their body temperature may be low or normal instead of constituting a fever . Severe sepsis causes poor organ function or blood flow. The presence of low blood pressure , high blood lactate , or low urine output may suggest poor blood flow. Septic shock

SECTION 10

#1732872372799

1584-415: A day or two before other signs. Examination of the chest may be normal, but it may show decreased expansion on the affected side. Harsh breath sounds from the larger airways that are transmitted through the inflamed lung are termed bronchial breathing and are heard on auscultation with a stethoscope. Crackles (rales) may be heard over the affected area during inspiration . Percussion may be dulled over

1716-554: A deficiency of chemicals that constrict blood vessels such as vasopressin , and activation of ATP-sensitive potassium channels . In those with severe sepsis and septic shock, this sequence of events leads to a type of circulatory shock known as distributive shock . Early diagnosis is necessary to properly manage sepsis, as the initiation of rapid therapy is key to reducing deaths from severe sepsis. Some hospitals use alerts generated from electronic health records to bring attention to potential cases as early as possible. Within

1848-462: A fast heart rate , confusion , and edema . Early signs include a rapid heart rate, decreased urination , and high blood sugar . Signs of established sepsis include confusion, metabolic acidosis (which may be accompanied by a faster breathing rate that leads to respiratory alkalosis ), low blood pressure due to decreased systemic vascular resistance , higher cardiac output , and disorders in blood-clotting that may lead to organ failure. Fever

1980-800: A foreign bodies, immunosuppression, and hypersensitivity should be suspected. Prevention includes vaccination , environmental measures, and appropriate treatment of other health problems. It is believed that, if appropriate preventive measures were instituted globally, mortality among children could be reduced by 400,000; and, if proper treatment were universally available, childhood deaths could be decreased by another 600,000. Vaccination prevents against certain bacterial and viral pneumonias both in children and adults. Influenza vaccines are modestly effective at preventing symptoms of influenza, The Centers for Disease Control and Prevention (CDC) recommends yearly influenza vaccination for every person 6 months and older. Immunizing health care workers decreases

2112-400: A higher dose of radiation, and cannot be done at bedside. Lung ultrasound may also be useful in helping to make the diagnosis. Ultrasound is radiation free and can be done at bedside. However, ultrasound requires specific skills to operate the machine and interpret the findings. It may be more accurate than chest X-ray. In people managed in the community, determining the causative agent

2244-462: A history of smoking, a poor ability to cough (such as following a stroke), and a weak immune system . Vaccines to prevent certain types of pneumonia (such as those caused by Streptococcus pneumoniae bacteria, linked to influenza , or linked to COVID-19 ) are available. Other methods of prevention include hand washing to prevent infection, and not smoking. Treatment depends on the underlying cause. Pneumonia believed to be due to bacteria

2376-435: A mean arterial pressure of between 65 and 90 mmHg, a central venous oxygen saturation (ScvO 2 ) greater than 70% and a urine output of greater than 0.5 mL/kg/hour. The goal is to optimize oxygen delivery to tissues and achieve a balance between systemic oxygen delivery and demand. An appropriate decrease in serum lactate may be equivalent to ScvO 2 and easier to obtain. In the original trial, early goal-directed therapy

2508-493: A million cases per year in the United States. Rates of disease have been increasing. Some data indicate that sepsis is more common among males than females, however, other data show a greater prevalence of the disease among women. Descriptions of sepsis date back to the time of Hippocrates . In addition to symptoms related to the actual cause, people with sepsis may have a fever , low body temperature , rapid breathing ,

2640-413: A new consensus was reached to replace screening by systemic inflammatory response syndrome (SIRS) with the sequential organ failure assessment ( SOFA score ) and the abbreviated version ( qSOFA ). The three criteria for the qSOFA score include a respiratory rate greater than or equal to 22 breaths per minute, systolic blood pressure 100 mmHg or less and altered mental status. Sepsis is suspected when 2 of

2772-467: A sepsis diagnosis required the presence of at least two systemic inflammatory response syndrome (SIRS) criteria in the setting of presumed infection. In 2016, a shortened sequential organ failure assessment score (SOFA score), known as the quick SOFA score (qSOFA), replaced the SIRS system of diagnosis. qSOFA criteria for sepsis include at least two of the following three: increased breathing rate, change in

SECTION 20

#1732872372799

2904-648: A state of adrenal insufficiency and tissue resistance to corticosteroids may occur. This has been termed critical illness–related corticosteroid insufficiency . Treatment with corticosteroids might be most beneficial in those with septic shock and early severe ARDS, whereas its role in others such as those with pancreatitis or severe pneumonia is unclear. However, the exact way of determining corticosteroid insufficiency remains problematic. It should be suspected in those poorly responding to resuscitation with fluids and vasopressors. Neither ACTH stimulation testing nor random cortisol levels are recommended to confirm

3036-406: Is a potentially life-threatening condition that arises when the body's response to infection causes injury to its own tissues and organs. This initial stage of sepsis is followed by suppression of the immune system . Common signs and symptoms include fever , increased heart rate , increased breathing rate , and confusion . There may also be symptoms related to a specific infection, such as

3168-399: Is also correlated with an increased chance that someone with sepsis will benefit from and respond to IV fluids . Infections leading to sepsis are usually bacterial but may be fungal , parasitic , or viral . Gram-positive bacteria were the primary cause of sepsis before the introduction of antibiotics in the 1950s. After the introduction of antibiotics, gram-negative bacteria became

3300-411: Is another rare cause due to lipids entering the lung. These lipids can either be inhaled or spread to the lungs from elsewhere in the body. Pneumonia frequently starts as an upper respiratory tract infection that moves into the lower respiratory tract. It is a type of pneumonitis (lung inflammation). The normal flora of the upper airway give protection by competing with pathogens for nutrients. In

3432-996: Is associated with Chlamydia psittaci ; farm animals with Coxiella burnetti ; aspiration of stomach contents with anaerobic organisms; and cystic fibrosis with Pseudomonas aeruginosa and Staphylococcus aureus . Streptococcus pneumoniae is more common in the winter, and it should be suspected in persons aspirating a large number of anaerobic organisms. In adults, viruses account for about one third of pneumonia cases, and in children for about 15% of them. Commonly implicated agents include rhinoviruses , coronaviruses , influenza virus , respiratory syncytial virus (RSV), adenovirus , and parainfluenza . Herpes simplex virus rarely causes pneumonia, except in groups such as newborns, persons with cancer, transplant recipients, and people with significant burns. After organ transplantation or in otherwise immunocompromised persons, there are high rates of cytomegalovirus pneumonia. Those with viral infections may be secondarily infected with

3564-448: Is associated with an increased risk of pneumonia. Approximately 10% of people who require mechanical ventilation develop ventilator-associated pneumonia , and people with a gastric feeding tube have an increased risk of developing aspiration pneumonia . Moreover, the misplacement of a feeding tube can lead to aspiration pneumonia. 28% of tube malposition results in pneumonia. As with Avanos Medical 's feeding tube placement system,

3696-477: Is associated with lower mortality in sepsis. The differential diagnosis for sepsis is broad and has to examine (to exclude) the non-infectious conditions that may cause the systemic signs of SIRS: alcohol withdrawal , acute pancreatitis , burns , pulmonary embolism , thyrotoxicosis , anaphylaxis , adrenal insufficiency , and neurogenic shock . Hyperinflammatory syndromes such as hemophagocytic lymphohistiocytosis (HLH) may have similar symptoms and are on

3828-506: Is available for adults, and has been found to decrease the risk of invasive pneumococcal disease by 74%, but there is insufficient evidence to suggest using the pneumococcal vaccine to prevent pneumonia or death in the general adult population. The CDC recommends that young children and adults over the age of 65 receive the pneumococcal vaccine, as well as older children or younger adults who have an increased risk of getting pneumococcal disease. The pneumococcal vaccine has been shown to reduce

3960-457: Is controversial, with some reviews finding benefit, and others not. Disease severity partly determines the outcome. The risk of death from sepsis is as high as 30%, while for severe sepsis it is as high as 50%, and septic shock 80%. Sepsis affected about 49 million people in 2017, with 11 million deaths (1 in 5 deaths worldwide). In the developed world , approximately 0.2 to 3 people per 1000 are affected by sepsis yearly, resulting in about

4092-644: Is due primarily to cytokine -induced systemic inflammation . In the developed world , these infections are most common in people returning from travel or in immigrants. Around the world, parasitic pneumonia is most common in the immunodeficient. Idiopathic interstitial pneumonia or noninfectious pneumonia is a class of diffuse lung diseases . They include diffuse alveolar damage , organizing pneumonia , nonspecific interstitial pneumonia , lymphocytic interstitial pneumonia , desquamative interstitial pneumonia , respiratory bronchiolitis interstitial lung disease , and usual interstitial pneumonia . Lipoid pneumonia

Jarisch–Herxheimer reaction - Misplaced Pages Continue

4224-796: Is due to infections caused primarily by bacteria or viruses and less commonly by fungi and parasites . Although more than 100 strains of infectious agents have been identified, only a few are responsible for the majority of cases. Mixed infections with both viruses and bacteria may occur in roughly 45% of infections in children and 15% of infections in adults. A causative agent may not be isolated in about half of cases despite careful testing. In an active population-based surveillance for community-acquired pneumonia requiring hospitalization in five hospitals in Chicago and Nashville from January 2010 through June 2012, 2259 patients were identified who had radiographic evidence of pneumonia and specimens that could be tested for

4356-485: Is important in determining the survival of the person. Some recommend they be given within one hour of making the diagnosis, stating that for every hour of delay in the administration of antibiotics, there is an associated 6% rise in mortality. Others did not find a benefit with early administration. Several factors determine the most appropriate choice for the initial antibiotic regimen. These factors include local patterns of bacterial sensitivity to antibiotics, whether

4488-460: Is important to treatment, as it correlates to which pathogens are likely suspects, which mechanisms are likely, which antibiotics are likely to work or fail, and which complications can be expected based on the person's health status. Community-acquired pneumonia (CAP) is acquired in the community, outside of health care facilities. Compared with healthcare-associated pneumonia, it is less likely to involve multidrug-resistant bacteria. Although

4620-445: Is increased. Bacteria are the most common cause of community-acquired pneumonia (CAP), with Streptococcus pneumoniae isolated in nearly 50% of cases. Other commonly isolated bacteria include Haemophilus influenzae in 20%, Chlamydophila pneumoniae in 13%, and Mycoplasma pneumoniae in 3% of cases; Staphylococcus aureus ; Moraxella catarrhalis ; and Legionella pneumophila . A number of drug-resistant versions of

4752-448: Is known as lobar pneumonia. However, findings may vary, and other patterns are common in other types of pneumonia. Aspiration pneumonia may present with bilateral opacities primarily in the bases of the lungs and on the right side. Radiographs of viral pneumonia may appear normal, appear hyper-inflated, have bilateral patchy areas, or present similar to bacterial pneumonia with lobar consolidation. Radiologic findings may not be present in

4884-441: Is low blood pressure due to sepsis that does not improve after fluid replacement . Sepsis is caused by many organisms including bacteria, viruses, and fungi. Common locations for the primary infection include the lungs, brain, urinary tract , skin, and abdominal organs . Risk factors include being very young or old, a weakened immune system from conditions such as cancer or diabetes , major trauma , and burns . Previously,

5016-576: Is most common in the Southwestern United States. The number of cases of fungal pneumonia has been increasing in the latter half of the 20th century due to increasing travel and rates of immunosuppression in the population. For people infected with HIV/AIDS , PCP is a common opportunistic infection . A variety of parasites can affect the lungs, including Toxoplasma gondii , Strongyloides stercoralis , Ascaris lumbricoides , and Plasmodium malariae . These organisms typically enter

5148-475: Is no myocardial ischemia , hypoxemia , or acute bleeding. In a 2014 trial, blood transfusions to keep target hemoglobin above 70 or 90 g/L did not make any difference to survival rates; meanwhile, those with a lower threshold of transfusion received fewer transfusions in total. Erythropoietin is not recommended in the treatment of anemia with septic shock because it may precipitate blood clotting events. Fresh frozen plasma transfusion usually does not correct

5280-530: Is not cost-effective and typically does not alter management. For people who do not respond to treatment, sputum culture should be considered, and culture for Mycobacterium tuberculosis should be carried out in persons with a chronic productive cough. Microbiological evaluation is also indicated in severe pneumonia, alcoholism, asplenia , immunosuppression, HIV infection, and those being empirically treated for MRSA of pseudomonas. Although positive blood culture and pleural fluid culture definitively establish

5412-737: Is not enough to maintain blood pressure, then the use of medications that raise blood pressure becomes necessary. Mechanical ventilation and dialysis may be needed to support the function of the lungs and kidneys, respectively. A central venous catheter and an arterial catheter may be placed for access to the bloodstream and to guide treatment. Other helpful measurements include cardiac output and superior vena cava oxygen saturation . People with sepsis need preventive measures for deep vein thrombosis , stress ulcers , and pressure ulcers unless other conditions prevent such interventions. Some people might benefit from tight control of blood sugar levels with insulin . The use of corticosteroids

Jarisch–Herxheimer reaction - Misplaced Pages Continue

5544-403: Is not intended to replace the SIRS definition. qSOFA has also been found to be poorly sensitive though decently specific for the risk of death with SIRS possibly better for screening. NOTE - Surviving Sepsis Campaign 2021 Guidelines recommends "against using qSOFA compared with SIRS, NEWS, or MEWS as a single screening tool for sepsis or septic shock". Examples of end-organ dysfunction include

5676-563: Is not recommended in people who has SIRS without any infectious origin such as acute pancreatitis and burns unless sepsis is suspected. Once-daily dosing of aminoglycoside is sufficient to achieve peak plasma concentration for a clinical response without kidney toxicity. Meanwhile, for antibiotics with low volume distribution (vancomycin, teicoplanin, colistin), a loading dose is required to achieve an adequate therapeutic level to fight infections. Frequent infusions of beta-lactam antibiotics without exceeding total daily dose would help to keep

5808-477: Is often used as a first-line treatment for hypotensive septic shock because evidence shows that there is a relative deficiency of vasopressin when shock continues for 24 to 48 hours. Norepinephrine raises blood pressure through a vasoconstriction effect, with little effect on stroke volume and heart rate. In some people, the required dose of vasopressor needed to increase the mean arterial pressure can become exceedingly high that it becomes toxic. In order to reduce

5940-532: Is poor. Within twelve hours, it is essential to diagnose or exclude any source of infection that would require emergent source control, such as a necrotizing soft tissue infection, an infection causing inflammation of the abdominal cavity lining , an infection of the bile duct , or an intestinal infarction. A pierced internal organ (free air on an abdominal X-ray or CT scan), an abnormal chest X-ray consistent with pneumonia (with focal opacification), or petechiae , purpura , or purpura fulminans may indicate

6072-624: Is recommended as the fluid of choice for resuscitation. Albumin can be used if a large amount of crystalloid is required for resuscitation. Crystalloid solutions shows little difference with hydroxyethyl starch in terms of risk of death. Starches also carry an increased risk of acute kidney injury , and need for blood transfusion. Various colloid solutions (such as modified gelatin) carry no advantage over crystalloid. Albumin also appears to be of no benefit over crystalloids. The Surviving Sepsis Campaign recommended packed red blood cells transfusion for hemoglobin levels below 70 g/L if there

6204-702: Is recommended for moderate to severe ARDS in sepsis as it opens more lung units for oxygen exchange. Predicted body weight is calculated based on sex and height, and tools for this are available. Recruitment maneuvers may be necessary for severe ARDS by briefly raising the transpulmonary pressure. It is recommended that the head of the bed be raised if possible to improve ventilation. However, β2 adrenergic receptor agonists are not recommended to treat ARDS because it may reduce survival rates and precipitate abnormal heart rhythms . A spontaneous breathing trial using continuous positive airway pressure (CPAP), T piece, or inspiratory pressure augmentation can be helpful in reducing

6336-453: Is recommended. For methicillin-resistant Staphylococcus aureus (MRSA), vancomycin or teicoplanin is recommended. For Legionella infection, addition of macrolide or fluoroquinolone is chosen. If fungal infection is suspected, an echinocandin , such as caspofungin or micafungin , is chosen for people with severe sepsis, followed by triazole ( fluconazole and itraconazole ) for less ill people. Prolonged antibiotic prophylaxis

6468-465: Is sometimes called MCAP (medical care–associated pneumonia). People may become infected with pneumonia in a hospital; this is defined as pneumonia not present at the time of admission (symptoms must start at least 48 hours after admission). It is likely to involve hospital-acquired infections , with higher risk of multidrug-resistant pathogens. People in a hospital often have other medical conditions, which may make them more susceptible to pathogens in

6600-723: Is sometimes more broadly applied to any condition resulting in inflammation of the lungs (caused for example by autoimmune diseases , chemical burns or drug reactions); however, this inflammation is more accurately referred to as pneumonitis . Factors that predispose to pneumonia include smoking, immunodeficiency , alcoholism, chronic obstructive pulmonary disease , sickle cell disease (SCD), asthma , chronic kidney disease , liver disease , and biological aging . Additional risks in children include not being breastfed , exposure to cigarette smoke and other air pollution, malnutrition, and poverty. The use of acid-suppressing medications – such as proton-pump inhibitors or H2 blockers –

6732-423: Is the most common presenting symptom in sepsis, but fever may be absent in some people such as the elderly or those who are immunocompromised. The drop in blood pressure seen in sepsis can cause lightheadedness and is part of the criteria for septic shock . Oxidative stress is observed in septic shock, with circulating levels of copper and vitamin C being decreased. Diastolic blood pressure falls during

SECTION 50

#1732872372799

6864-413: Is then activated because leukocytes are not recruited to the specific site of infection, but instead they are recruited all over the body. Then, an immunosuppression state ensues when the proinflammatory T helper cell 1 (TH1) is shifted to TH2, mediated by interleukin 10 , which is known as "compensatory anti-inflammatory response syndrome". The apoptosis (cell death) of lymphocytes further worsens

6996-571: Is traditionally associated with antimicrobial treatment of syphilis . The reaction is also seen in the other diseases caused by spirochetes : Lyme disease , relapsing fever , and leptospirosis . There have been case reports of the Jarisch–Herxheimer reaction accompanying treatment of other infections, including Q fever , bartonellosis , brucellosis , trichinellosis , and African trypanosomiasis . Lipoproteins released from treatment of Treponema pallidum infections are believed to induce

7128-432: Is treated with antibiotics . If the pneumonia is severe, the affected person is generally hospitalized. Oxygen therapy may be used if oxygen levels are low. Each year, pneumonia affects about 450 million people globally (7% of the population) and results in about 4 million deaths. With the introduction of antibiotics and vaccines in the 20th century, survival has greatly improved. Nevertheless, pneumonia remains

7260-490: Is uncommon, but occurs more commonly in individuals with weakened immune systems due to AIDS, immunosuppressive drugs , or other medical problems. It is most often caused by Histoplasma capsulatum , Blastomyces , Cryptococcus neoformans , Pneumocystis jiroveci ( pneumocystis pneumonia , or PCP), and Coccidioides immitis . Histoplasmosis is most common in the Mississippi River basin , and coccidioidomycosis

7392-482: The cells lining blood vessels , leading to endothelial damage. The damaged endothelial surface inhibits anticoagulant properties as well as increases antifibrinolysis , which may lead to intravascular clotting, the formation of blood clots in small blood vessels, and multiple organ failure . The low blood pressure seen in those with sepsis is the result of various processes, including excessive production of chemicals that dilate blood vessels such as nitric oxide ,

7524-593: The central venous pressure reaches 8–12 mmHg. Once these goals are met, the central venous oxygen saturation (ScvO2), i.e., the oxygen saturation of venous blood as it returns to the heart as measured at the vena cava, is optimized. If the ScvO2 is less than 70%, blood may be given to reach a hemoglobin of 10 g/dL and then inotropes are added until the ScvO2 is optimized. In those with acute respiratory distress syndrome (ARDS) and sufficient tissue blood fluid, more fluids should be given carefully. Crystalloid solution

7656-561: The peptidoglycan of the gram-positive bacterial cell wall, and CpG bacterial DNA . These PAMPs are recognized by the pattern recognition receptors (PRRs) of the innate immune system, which may be membrane-bound or cytosolic. There are four families of PRRs: the toll-like receptors , the C-type lectin receptors, the NOD-like receptors , and the RIG-I-like receptors . Invariably, the association of

7788-630: The CORTRAK* 2 EAS, which was recalled in May 2022 by the FDA due to adverse events reported, including pneumonia, caused a total of 60 injuries and 23 patient deaths, as communicated by the FDA. For people with certain variants of the FER gene , the risk of death is reduced in sepsis caused by pneumonia. However, for those with TLR6 variants, the risk of getting Legionnaires' disease

7920-564: The Jarisch–Herxheimer reaction. The Herxheimer reaction has shown an increase in inflammatory cytokines during the period of exacerbation, including tumor necrosis factor alpha , interleukin-6 and interleukin-8 . Prophylaxis and treatment with an anti-inflammatory agent may stop progression of the reaction. Oral aspirin or ibuprofen every four hours for a day or 60 mg of prednisone orally or intravenously has been used as an adjunctive treatment . However, steroids are generally of no benefit. Patients must be closely monitored for

8052-591: The PCT to direct antibiotic therapy for improved antibiotic stewardship and better patient outcomes. A 2012 systematic review found that soluble urokinase-type plasminogen activator receptor (SuPAR) is a nonspecific marker of inflammation and does not accurately diagnose sepsis. This same review concluded, however, that SuPAR has prognostic value, as higher SuPAR levels are associated with an increased rate of death in those with sepsis. Serial measurement of lactate levels (approximately every 4 to 6 hours) may guide treatment and

SECTION 60

#1732872372799

8184-513: The above infections are becoming more common, including drug-resistant Streptococcus pneumoniae (DRSP) and methicillin-resistant Staphylococcus aureus (MRSA). The spreading of organisms is facilitated by certain risk factors. Alcoholism is associated with Streptococcus pneumoniae , anaerobic organisms , and Mycobacterium tuberculosis ; smoking facilitates the effects of Streptococcus pneumoniae , Haemophilus influenzae , Moraxella catarrhalis , and Legionella pneumophila . Exposure to birds

8316-462: The absence of antigen presentation . This forced receptor interaction induces the production of pro-inflammatory chemical signals ( cytokines ) by T-cells. There are a number of microbial factors that may cause the typical septic inflammatory cascade . An invading pathogen is recognized by its pathogen-associated molecular patterns (PAMPs). Examples of PAMPs include lipopolysaccharides and flagellin in gram-negative bacteria, muramyl dipeptide in

8448-560: The additional feature of pulmonary consolidation . Pneumonia is most commonly classified by where or how it was acquired: community-acquired, aspiration, healthcare-associated , hospital-acquired , and ventilator-associated pneumonia. It may also be classified by the area of the lung affected: lobar, bronchial pneumonia and acute interstitial pneumonia ; or by the causative organism. Pneumonia in children may additionally be classified based on signs and symptoms as non-severe, severe, or very severe. The setting in which pneumonia develops

8580-421: The affected lung, and increased, rather than decreased, vocal resonance distinguishes pneumonia from a pleural effusion . A chest radiograph is frequently used in diagnosis. In people with mild disease, imaging is needed only in those with potential complications, those not having improved with treatment, or those in which the cause is uncertain. If a person is sufficiently sick to require hospitalization,

8712-421: The alveoli, resulting in the consolidation seen on chest X-ray. Viruses may reach the lung by a number of different routes. Respiratory syncytial virus is typically contracted when people touch contaminated objects and then touch their eyes or nose. Other viral infections occur when contaminated airborne droplets are inhaled through the nose or mouth. Once in the upper airway, the viruses may make their way into

8844-464: The antibiotics level above minimum inhibitory concentration (MIC), thus providing a better clinical response. Giving beta-lactam antibiotics continuously may be better than giving them intermittently. Access to therapeutic drug monitoring is important to ensure adequate drug therapeutic level while at the same time preventing the drug from reaching toxic level. The Surviving Sepsis Campaign has recommended 30 mL/kg of fluid to be given in adults in

8976-517: The bacteria Streptococcus pneumoniae , Staphylococcus aureus , or Haemophilus influenzae , particularly when other health problems are present. Different viruses predominate at different times of the year; during flu season , for example, influenza may account for more than half of all viral cases. Outbreaks of other viruses also occur occasionally, including hantaviruses and coronaviruses. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) can also result in pneumonia. Fungal pneumonia

9108-425: The blood also does not demonstrate any survival benefit for septic shock. If the person has been sufficiently fluid resuscitated but the mean arterial pressure is not greater than 65 mmHg, vasopressors are recommended. Norepinephrine (noradrenaline) is recommended as the initial choice. Delaying initiation of vasopressor therapy during septic shock is associated with increased mortality. Norepinephrine

9240-546: The blood pressure should be adequate, close monitoring of blood pressure and blood supply to organs should be in place, and the lactate should be measured again if initially it was raised. A related bundle, the " Sepsis Six ", is in widespread use in the United Kingdom ; this requires the administration of antibiotics within an hour of recognition, blood cultures, lactate, and hemoglobin determination, urine output monitoring, high-flow oxygen, and intravenous fluids. Apart from

9372-449: The blood. Once in the lungs, bacteria may invade the spaces between cells and between alveoli, where the macrophages and neutrophils (defensive white blood cells ) attempt to inactivate the bacteria. The neutrophils also release cytokines, causing a general activation of the immune system. This leads to the fever, chills, and fatigue common in bacterial pneumonia. The neutrophils, bacteria, and fluid from surrounding blood vessels fill

9504-511: The body through direct contact with the skin, ingestion, or via an insect vector. Except for Paragonimus westermani , most parasites do not specifically affect the lungs but involve the lungs secondarily to other sites. Some parasites, in particular those belonging to the Ascaris and Strongyloides genera, stimulate a strong eosinophilic reaction, which may result in eosinophilic pneumonia . In other infections, such as malaria, lung involvement

9636-546: The cause and support decisions about who should receive antibiotics. Antibiotics are encouraged if the procalcitonin level reaches 0.25 μg/L, strongly encouraged if it reaches 0.5 μg/L, and strongly discouraged if the level is below 0.10 μg/L. In people requiring hospitalization, pulse oximetry , chest radiography and blood tests – including a complete blood count , serum electrolytes , C-reactive protein level, and possibly liver function tests – are recommended. The diagnosis of influenza-like illness can be made based on

9768-652: The condition is variable. Pneumonia is usually caused by infection with viruses or bacteria, and less commonly by other microorganisms . Identifying the responsible pathogen can be difficult. Diagnosis is often based on symptoms and physical examination . Chest X-rays , blood tests, and culture of the sputum may help confirm the diagnosis. The disease may be classified by where it was acquired, such as community- or hospital-acquired or healthcare-associated pneumonia. Risk factors for pneumonia include cystic fibrosis , chronic obstructive pulmonary disease (COPD), sickle cell disease , asthma , diabetes , heart failure,

9900-427: The condition, but they are associated with side effects. Zanamivir or oseltamivir decrease the chance that people who are exposed to the virus will develop symptoms; however, it is recommended that potential side effects are taken into account. Smoking cessation and reducing indoor air pollution , such as that from cooking indoors with wood, crop residues or dung , are both recommended. Smoking appears to be

10032-404: The diagnosis is unlikely. However, the underlying cause can be difficult to confirm, as there is no definitive test able to distinguish between bacterial and non-bacterial cause. The overall impression of a physician appears to be at least as good as decision rules for making or excluding the diagnosis. The World Health Organization has defined pneumonia in children clinically based on either

10164-508: The diagnosis of the type of micro-organism involved, a positive sputum culture has to be interpreted with care for the possibility of colonisation of respiratory tract. Testing for other specific organisms may be recommended during outbreaks, for public health reasons. In those hospitalized for severe disease, both sputum and blood cultures are recommended, as well as testing the urine for antigens to Legionella and Streptococcus . Viral infections, can be confirmed via detection of either

10296-528: The diagnosis. The method of stopping glucocorticoid drugs is variable, and it is unclear whether they should be slowly decreased or simply abruptly stopped. However, the 2016 Surviving Sepsis Campaign recommended to taper steroids when vasopressors are no longer needed. A target tidal volume of 6 mL/kg of predicted body weight (PBW) and a plateau pressure less than 30 cm H 2 O is recommended for those who require ventilation due to sepsis-induced severe ARDS. High positive end expiratory pressure (PEEP)

10428-499: The differential diagnosis. In common clinical usage, neonatal sepsis refers to a bacterial blood stream infection in the first month of life, such as meningitis , pneumonia , pyelonephritis , or gastroenteritis , but neonatal sepsis also may be due to infection with fungi, viruses, or parasites. Criteria with regard to hemodynamic compromise or respiratory failure are not useful because they present too late for intervention. Early recognition and focused management may improve

10560-411: The discovery of the Jarisch–Herxheimer reaction. Both Jarisch and Herxheimer observed reactions in patients with syphilis treated with mercury . The reaction was first seen following treatment in early and later stages of syphilis treated with Salvarsan , mercury, or antibiotics . Jarisch thought that the reaction was caused by a toxin released from the dying spirochetes. Sepsis Sepsis

10692-415: The duration of ventilation. Minimizing intermittent or continuous sedation is helpful in reducing the duration of mechanical ventilation. General anesthesia is recommended for people with sepsis who require surgical procedures to remove the infective source. Usually, inhalational and intravenous anesthetics are used. Requirements for anesthetics may be reduced in sepsis. Inhalational anesthetics can reduce

10824-444: The early stages of sepsis, causing a widening/increasing of pulse pressure , which is the difference between the systolic and diastolic blood pressures. If sepsis becomes severe and hemodynamic compromise advances, the systolic pressure also decreases, causing a narrowing/decreasing of pulse pressure. A pulse pressure of over 70 mmHg in patients with sepsis is correlated with an increased chance of survival. A widened pulse pressure

10956-758: The early stages of the disease, especially in the presence of dehydration, or may be difficult to interpret in the obese or those with a history of lung disease. Complications such as pleural effusion may also be found on chest radiographs. Laterolateral chest radiographs can increase the diagnostic accuracy of lung consolidation and pleural effusion. A CT scan can give additional information in indeterminate cases and provide more details in those with an unclear chest radiograph (for example occult pneumonia in chronic obstructive pulmonary disease). They can be used to exclude pulmonary embolism and fungal pneumonia , and detect lung abscesses in those who are not responding to treatments. However, CT scans are more expensive, have

11088-427: The first dose of antibiotics as fever , chills , rigor , hypotension , headache , tachycardia , hyperventilation , vasodilation with flushing , myalgia (muscle pain), exacerbation of skin lesions and anxiety. The intensity of the reaction indicates the severity of inflammation . Reaction commonly occurs within two hours of drug administration , but is usually self-limiting. The Jarisch–Herxheimer reaction

11220-418: The first three hours followed by fluid titration according to blood pressure, urine output, respiratory rate, and oxygen saturation with a target mean arterial pressure (MAP) of 65 mmHg. In children an initial amount of 20 mL/kg is reasonable in shock. In cases of severe sepsis and septic shock where a central venous catheter is used to measure blood pressures dynamically, fluids should be administered until

11352-456: The first three hours of suspected sepsis, diagnostic studies should include white blood cell counts , measuring serum lactate, and obtaining appropriate cultures before starting antibiotics, so long as this does not delay their use by more than 45 minutes. To identify the causative organism(s), at least two sets of blood cultures using bottles with media for aerobic and anaerobic organisms are necessary. At least one should be drawn through

11484-499: The following: More specific definitions of end-organ dysfunction exist for SIRS in pediatrics. Consensus definitions, however, continue to evolve, with the latest expanding the list of signs and symptoms of sepsis to reflect clinical bedside experience. Biomarkers can help diagnosis because they can point to the presence or severity of sepsis, although their exact role in the management of sepsis remains undefined. A 2013 review concluded moderate-quality evidence exists to support

11616-497: The heart, finger/toes, and abdominal organs, resulting in a lack of oxygen supply to these tissues. Dopamine is typically not recommended. Although dopamine is useful to increase the stroke volume of the heart, it causes more abnormal heart rhythms than norepinephrine and also has an immunosuppressive effect. Dopamine is not proven to have protective properties on the kidneys. Dobutamine can also be used in hypotensive septic shock to increase cardiac output and correct blood flow to

11748-583: The heart, impaired calcium transport, and low production of adenosine triphosphate (ATP), can cause myocardial depression, reducing cardiac contractility and causing heart failure . In the gastrointestinal tract , increased permeability of the mucosa alters the microflora, causing mucosal bleeding and paralytic ileus . In the central nervous system , direct damage of the brain cells and disturbances of neurotransmissions causes altered mental status. Cytokines such as tumor necrosis factor , interleukin 1 , and interleukin 6 may activate procoagulation factors in

11880-634: The hospital. Ventilator-associated pneumonia occurs in people breathing with the help of mechanical ventilation. Ventilator-associated pneumonia is specifically defined as pneumonia that arises more than 48 to 72 hours after endotracheal intubation . Several diseases can present with similar signs and symptoms to pneumonia, such as: chronic obstructive pulmonary disease, asthma, pulmonary edema , bronchiectasis , lung cancer, and pulmonary emboli . Unlike pneumonia, asthma and COPD typically present with wheezing, pulmonary edema presents with an abnormal electrocardiogram , cancer and bronchiectasis present with

12012-474: The host. Sepsis caused by gram-negative bacteria is thought to be largely due to a response by the host to the lipid A component of lipopolysaccharide , also called endotoxin . Sepsis caused by gram-positive bacteria may result from an immunological response to cell wall lipoteichoic acid . Bacterial exotoxins that act as superantigens also may cause sepsis. Superantigens simultaneously bind major histocompatibility complex and T-cell receptors in

12144-497: The immune system . Either of these phases may prove fatal. On the other hand, systemic inflammatory response syndrome (SIRS) occurs in people without the presence of infection, for example, in those with burns , polytrauma , or the initial state in pancreatitis and chemical pneumonitis . However, sepsis also causes similar response to SIRS. Bacterial virulence factors , such as glycocalyx and various adhesins , allow colonization, immune evasion, and establishment of disease in

12276-484: The immunosuppression. Neutrophils , monocytes , macrophages , dendritic cells , CD4+ T cells , and B cells all undergo apoptosis, whereas regulatory T cells are more apoptosis resistant. Subsequently, multiple organ failure ensues because tissues are unable to use oxygen efficiently due to inhibition of cytochrome c oxidase . Inflammatory responses cause multiple organ dysfunction syndrome through various mechanisms as described below. Increased permeability of

12408-406: The infection is thought to be a hospital or community-acquired infection, and which organ systems are thought to be infected. Antibiotic regimens should be reassessed daily and narrowed if appropriate. Treatment duration is typically 7–10 days with the type of antibiotic used directed by the results of cultures. If the culture result is negative, antibiotics should be de-escalated according to

12540-512: The initiation of antibiotics. Cultures from other sites such as respiratory secretions, urine, wounds, cerebrospinal fluid, and catheter insertion sites (in-situ more than 48 hours) are recommended if infections from these sites are suspected. In severe sepsis and septic shock, broad-spectrum antibiotics (usually two, a β-lactam antibiotic with broad coverage, or broad-spectrum carbapenem combined with fluoroquinolones , macrolides , or aminoglycosides ) are recommended. The choice of antibiotics

12672-582: The latter are no longer rare in CAP, they are still less likely. Prior stays in healthcare-related environments such as hospitals, nursing homes, or hemodialysis centers or a history of receiving domiciliary care can increase patients' risk for CAP caused by multidrug-resistant bacteria. Health care–associated pneumonia (HCAP) is an infection associated with recent exposure to the health care system, including hospitals, outpatient clinics, nursing homes , dialysis centers, chemotherapy treatment, or home care . HCAP

12804-657: The level of consciousness, and low blood pressure. Sepsis guidelines recommend obtaining blood cultures before starting antibiotics; however, the diagnosis does not require the blood to be infected . Medical imaging is helpful when looking for the possible location of the infection. Other potential causes of similar signs and symptoms include anaphylaxis , adrenal insufficiency , low blood volume , heart failure , and pulmonary embolism . Sepsis requires immediate treatment with intravenous fluids and antimicrobial medication. Ongoing care often continues in an intensive care unit . If an adequate trial of fluid replacement

12936-510: The level of proinflammatory cytokines, altering leukocyte adhesion and proliferation, inducing apoptosis (cell death) of the lymphocytes, possibly with a toxic effect on mitochondrial function. Although etomidate has a minimal effect on the cardiovascular system, it is often not recommended as a medication to help with intubation in this situation due to concerns it may lead to poor adrenal function and an increased risk of death. The small amount of evidence there is, however, has not found

13068-431: The lower airways, reflexes of the glottis , actions of complement proteins and immunoglobulins are important for protection. Micro aspiration of contaminated secretions can infect the lower airways and cause pneumonia. The progress of pneumonia is determined by the virulence of the organism; the amount of organism required to start an infection; and the body's immune response against the infection. Most bacteria enter

13200-451: The lung vessels causes leaking of fluids into alveoli, which results in pulmonary edema and acute respiratory distress syndrome (ARDS). Impaired utilization of oxygen in the liver impairs bile salt transport, causing jaundice (yellowish discoloration of the skin). In kidneys, inadequate oxygenation results in tubular epithelial cell injury (of the cells lining the kidney tubules), and thus causes acute kidney injury (AKI). Meanwhile, in

13332-464: The lungs via small aspirations of organisms residing in the throat or nose. Half of normal people have these small aspirations during sleep. While the throat always contains bacteria, potentially infectious ones reside there only at certain times and under certain conditions. A minority of types of bacteria such as Mycobacterium tuberculosis and Legionella pneumophila reach the lungs via contaminated airborne droplets. Bacteria can also spread via

13464-418: The lungs, many viruses simultaneously affect other organs and thus disrupt other body functions. Viruses also make the body more susceptible to bacterial infections; in this way, bacterial pneumonia can occur at the same time as viral pneumonia. Pneumonia is typically diagnosed based on a combination of physical signs and often a chest X-ray . In adults with normal vital signs and a normal lung examination,

13596-433: The lungs, where they invade the cells lining the airways, alveoli, or lung parenchyma . Some viruses such as measles and herpes simplex may reach the lungs via the blood. The invasion of the lungs may lead to varying degrees of cell death. When the immune system responds to the infection, even more lung damage may occur. Primarily white blood cells, mainly mononuclear cells , generate the inflammation. As well as damaging

13728-406: The lungs. In one-third to one-half of cases, the source of infection is unclear. Sepsis is caused by a combination of factors related to the particular invading pathogen(s) and to the status of the immune system of the host. The early phase of sepsis characterized by excessive inflammation (sometimes resulting in a cytokine storm ) may be followed by a prolonged period of decreased functioning of

13860-400: The lymph nodes in the neck , joint pain , or a middle ear infection . Viral pneumonia presents more commonly with wheezing than bacterial pneumonia. Pneumonia was historically divided into "typical" and "atypical" based on the belief that the presentation predicted the underlying cause. However, evidence has not supported this distinction, therefore it is no longer emphasized. Pneumonia

13992-427: The management of severe sepsis during the initial 6 hours after diagnosis. It is a step-wise approach, with the physiologic goal of optimizing cardiac preload, afterload, and contractility. It includes giving early antibiotics. EGDT also involves monitoring of hemodynamic parameters and specific interventions to achieve key resuscitation targets which include maintaining a central venous pressure between 8–12 mmHg,

14124-437: The most common cause of fungal sepsis is an infection by Candida species of yeast , a frequent hospital-acquired infection . The most common causes for parasitic sepsis are Plasmodium (which leads to malaria ), Schistosoma and Echinococcus . The most common sites of infection resulting in severe sepsis are the lungs, the abdomen, and the urinary tract. Typically, 50% of all sepsis cases start as an infection in

14256-524: The most prominent sign. The typical signs and symptoms in children under five are fever, cough, and fast or difficult breathing. Fever is not very specific, as it occurs in many other common illnesses and may be absent in those with severe disease, malnutrition or in the elderly. In addition, a cough is frequently absent in children less than 2 months old. More severe signs and symptoms in children may include blue-tinged skin , unwillingness to drink, convulsions, ongoing vomiting, extremes of temperature, or

14388-490: The outcomes in sepsis. Current professional recommendations include a number of actions ("bundles") to be followed as soon as possible after diagnosis. Within the first three hours, someone with sepsis should have received antibiotics, and intravenous fluids if there is evidence of either low blood pressure or other evidence for inadequate blood supply to organs (as evidenced by a raised level of lactate); blood cultures also should be obtained within this time period. After six hours

14520-408: The person's clinical response or stopped altogether if an infection is not present to decrease the chances that the person is infected with multiple drug resistance organisms. In case of people having a high risk of being infected with multiple drug resistant organisms such as Pseudomonas aeruginosa , Acinetobacter baumannii , the addition of an antibiotic specific to the gram-negative organism

14652-414: The potential complications (collapse and shock) and may require IV fluids to maintain adequate blood pressure. If available, meptazinol , an opioid analgesic of the mixed agonist/antagonist type, should be administered to reduce the severity of the reaction. Anti TNF-α may also be effective. Both Adolf Jarisch , an Austrian dermatologist , and Karl Herxheimer , a German dermatologist, are credited with

14784-427: The predominant cause of sepsis from the 1960s to the 1980s. After the 1980s, gram-positive bacteria, most commonly staphylococci , are thought to cause more than 50% of cases of sepsis. Other commonly implicated bacteria include Streptococcus pyogenes , Escherichia coli , Pseudomonas aeruginosa , and Klebsiella species. Fungal sepsis accounts for approximately 5% of severe sepsis and septic shock cases;

14916-401: The presence of an infection. Previously, SIRS criteria had been used to define sepsis. If the SIRS criteria are negative, it is very unlikely the person has sepsis; if it is positive, there is just a moderate probability that the person has sepsis. According to SIRS, there were different levels of sepsis: sepsis, severe sepsis, and septic shock. The definition of SIRS is shown below: In 2016

15048-421: The probability of Mycoplasma pneumoniae . In general, in adults, investigations are not needed in mild cases. There is a very low risk of pneumonia if all vital signs and auscultation are normal. C-reactive protein (CRP) may help support the diagnosis. For those with CRP less than 20 mg/L without convincing evidence of pneumonia, antibiotics are not recommended. Procalcitonin may help determine

15180-755: The qSOFA criteria are met. The SOFA score was intended to be used in the intensive care unit (ICU) where it is administered upon admission to the ICU and then repeated every 48 hours, whereas the qSOFA could be used outside the ICU. Some advantages of the qSOFA score are that it can be administered quickly and does not require labs. However, the American College of Chest Physicians (CHEST) raised concerns that qSOFA and SOFA criteria may lead to delayed diagnosis of serious infection, leading to delayed treatment. Although SIRS criteria can be too sensitive and not specific enough in identifying sepsis, SOFA also has its limitations and

15312-448: The rate of death in newborns and adults with sepsis. Evidence for the use of IgM -enriched polyclonal preparations of IVIG is inconsistent. On the other hand, the use of antithrombin to treat disseminated intravascular coagulation is also not useful. Meanwhile, the blood purification technique (such as hemoperfusion , plasma filtration, and coupled plasma filtration adsorption) to remove inflammatory mediators and bacterial toxins from

15444-425: The required dose of vasopressor, epinephrine may be added. Epinephrine is not often used as a first-line treatment for hypotensive shock because it reduces blood flow to the abdominal organs and increases lactate levels. Vasopressin can be used in septic shock because studies have shown that there is a relative deficiency of vasopressin when shock continues for 24 to 48 hours. However, vasopressin reduces blood flow to

15576-500: The responsible pathogen. Most patients (62%) had no detectable pathogens in their sample, and unexpectedly, respiratory viruses were detected more frequently than bacteria. Specifically, 23% had one or more viruses, 11% had one or more bacteria, 3% had both bacterial and viral pathogens, and 1% had a fungal or mycobacterial infection. "The most common pathogens were human rhinovirus (in 9% of patients), influenza virus (in 6%), and Streptococcus pneumoniae (in 5%)." The term pneumonia

15708-519: The risk of community acquired pneumonia in people with chronic obstructive pulmonary disease, but does not reduce mortality or the risk of hospitalization for people with this condition. People with COPD are recommended by a number of guidelines to have a pneumococcal vaccination. Other vaccines for which there is support for a protective effect against pneumonia include pertussis , varicella , and measles . When influenza outbreaks occur, medications such as amantadine or rimantadine may help prevent

15840-521: The risk of viral pneumonia among their patients. Vaccinations against Haemophilus influenzae and Streptococcus pneumoniae have good evidence to support their use. There is strong evidence for vaccinating children under the age of 2 against Streptococcus pneumoniae ( pneumococcal conjugate vaccine ). Vaccinating children against Streptococcus pneumoniae has led to a decreased rate of these infections in adults, because many adults acquire infections from children. A Streptococcus pneumoniae vaccine

15972-442: The risk partly based on other health problems. For those without multiple organ system failures or who require only one inotropic agent, mortality is low. Pneumonia Pneumonia is an inflammatory condition of the lung primarily affecting the small air sacs known as alveoli . Symptoms typically include some combination of productive or dry cough , chest pain , fever, and difficulty breathing . The severity of

16104-527: The signs and symptoms; however, confirmation of an influenza infection requires testing. Thus, treatment is frequently based on the presence of influenza in the community or a rapid influenza test . Adults 65 years old or older, as well as cigarette smokers and people with ongoing medical conditions are at increased risk for pneumonia. Physical examination may sometimes reveal low blood pressure , high heart rate , or low oxygen saturation . The respiratory rate may be faster than normal, and this may occur

16236-468: The single biggest risk factor for pneumococcal pneumonia in otherwise-healthy adults. Hand hygiene and coughing into one's sleeve may also be effective preventative measures. Wearing surgical masks by the sick may also prevent illness. Appropriately treating underlying illnesses (such as HIV/AIDS, diabetes mellitus , and malnutrition) can decrease the risk of pneumonia. In children less than 6 months of age, exclusive breast feeding reduces both

16368-458: The skin and one through each vascular access device (such as an IV catheter) that has been in place more than 48 hours. Bacteria are present in the blood in only about 30% of cases. Another possible method of detection is by polymerase chain reaction . If other sources of infection are suspected, cultures of these sources, such as urine, cerebrospinal fluid, wounds, or respiratory secretions, also should be obtained, as long as this does not delay

16500-690: The timely administration of fluids and antibiotics , the management of sepsis also involves surgical drainage of infected fluid collections and appropriate support for organ dysfunction. This may include hemodialysis in kidney failure , mechanical ventilation in lung dysfunction, transfusion of blood products , and drug and fluid therapy for circulatory failure. Ensuring adequate nutrition—preferably by enteral feeding , but if necessary, by parenteral nutrition —is important during prolonged illness. Medication to prevent deep vein thrombosis and gastric ulcers also may be used. Two sets of blood cultures (aerobic and anaerobic) are recommended without delaying

16632-823: The tissues. Dobutamine is not used as often as epinephrine due to its associated side effects, which include reducing blood flow to the gut. Additionally, dobutamine increases the cardiac output by abnormally increasing the heart rate. The use of steroids in sepsis is controversial. Studies do not give a clear picture as to whether and when glucocorticoids should be used. The 2016 Surviving Sepsis Campaign recommends low dose hydrocortisone only if both intravenous fluids and vasopressors are not able to adequately treat septic shock. The 2021 Surviving Sepsis Campaign recommends IV corticosteroids for adults with septic shock who have an ongoing requirement for vasopressor therapy. A 2019 Cochrane review found low-quality evidence of benefit, as did two 2019 reviews. During critical illness,

16764-495: The underlying clotting abnormalities before a planned surgical procedure. However, platelet transfusion is suggested for platelet counts below (10 × 10 /L) without any risk of bleeding, or (20 × 10 /L) with high risk of bleeding, or (50 × 10 /L) with active bleeding, before a planned surgery or an invasive procedure. IV immunoglobulin is not recommended because its beneficial effects are uncertain. Monoclonal and polyclonal preparations of intravenous immunoglobulin (IVIG) do not lower

16896-484: The use of EGDT is still considered reasonable. Neonatal sepsis can be difficult to diagnose as newborns may be asymptomatic. If a newborn shows signs and symptoms suggestive of sepsis, antibiotics are immediately started and are either changed to target a specific organism identified by diagnostic testing or discontinued after an infectious cause for the symptoms has been ruled out. Despite early intervention, death occurs in 13% of children who develop septic shock, with

17028-436: The use of antibiotics. Within six hours, if blood pressure remains low despite initial fluid resuscitation of 30 mL/kg, or if initial lactate is ≥ four mmol/L (36 mg/dL), central venous pressure and central venous oxygen saturation should be measured. Lactate should be re-measured if the initial lactate was elevated. Evidence for point of care lactate measurement over usual methods of measurement, however,

17160-417: The use of the procalcitonin level as a method to distinguish sepsis from non-infectious causes of SIRS. The same review found the sensitivity of the test to be 77% and the specificity to be 79%. The authors suggested that procalcitonin may serve as a helpful diagnostic marker for sepsis, but cautioned that its level alone does not definitively make the diagnosis. More current literature recommends utilizing

17292-496: The virus or its antigens with culture or polymerase chain reaction (PCR), among other techniques. Mycoplasma , Legionella , Streptococcus , and Chlamydia can also be detected using PCR techniques on bronchoalveolar lavage and nasopharyngeal swab . The causative agent is determined in only 15% of cases with routine microbiological tests. Pneumonitis refers to lung inflammation; pneumonia refers to pneumonitis, usually due to infection but sometimes non-infectious, that has

17424-520: Was found to reduce mortality from 46.5% to 30.5% in those with sepsis, and the Surviving Sepsis Campaign has been recommending its use. However, three more recent large randomized control trials (ProCESS, ARISE, and ProMISe), did not demonstrate a 90-day mortality benefit of early goal-directed therapy when compared to standard therapy in severe sepsis. It is likely that some parts of EGDT are more important than others. Following these trials

#798201