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135-571: Ahrensbök came into existence after the foundation here of a pilgrimage chapel in 1280. The first documentary reference to the settlement dates from 1328. In 1348, the place was devastated by the Black Death . In 1397, the Carthusians founded a monastery here, Ahrensbök Charterhouse , which helped the place grow in prominence. In 1564, the Amt Ahrensbök, or district of Ahrensbök, was established as

270-406: A nucleus and rarely harbour membrane -bound organelles . Although the term bacteria traditionally included all prokaryotes, the scientific classification changed after the discovery in the 1990s that prokaryotes consist of two very different groups of organisms that evolved from an ancient common ancestor . These evolutionary domains are called Bacteria and Archaea . The word bacteria

405-543: A potential difference analogous to a battery. The general lack of internal membranes in bacteria means these reactions, such as electron transport , occur across the cell membrane between the cytoplasm and the outside of the cell or periplasm . However, in many photosynthetic bacteria, the plasma membrane is highly folded and fills most of the cell with layers of light-gathering membrane. These light-gathering complexes may even form lipid-enclosed structures called chlorosomes in green sulfur bacteria . Bacteria do not have

540-404: A terminal electron acceptor in a redox reaction . Chemotrophs are further divided by the types of compounds they use to transfer electrons. Bacteria that derive electrons from inorganic compounds such as hydrogen, carbon monoxide , or ammonia are called lithotrophs , while those that use organic compounds are called organotrophs . Still, more specifically, aerobic organisms use oxygen as

675-545: A "pestilential fever" ( febris pestilentialis ) in his work On the Signs and Symptoms of Diseases ( De signis et symptomatibus aegritudium ). The phrase mors nigra , 'black death', was used in 1350 by Simon de Covino (or Couvin), a Belgian astronomer, in his poem "On the Judgement of the Sun at a Feast of Saturn" ( De judicio Solis in convivio Saturni ), which attributes

810-744: A bacterial strain. However, liquid growth media are used when the measurement of growth or large volumes of cells are required. Growth in stirred liquid media occurs as an even cell suspension, making the cultures easy to divide and transfer, although isolating single bacteria from liquid media is difficult. The use of selective media (media with specific nutrients added or deficient, or with antibiotics added) can help identify specific organisms. Most laboratory techniques for growing bacteria use high levels of nutrients to produce large amounts of cells cheaply and quickly. However, in natural environments, nutrients are limited, meaning that bacteria cannot continue to reproduce indefinitely. This nutrient limitation has led

945-464: A civil administration unit, and between 1593 and 1601 a castle was built, Schloss Hoppenbrook, on the site and with the materials of the charterhouse, which had been secularised in the 1580s during the Protestant Reformation and subsequently demolished. In 1623, Schloss Hoppenbrook became for a few years the residence of the newly established Duchy of Schleswig-Holstein-Sonderburg-Plön , until

1080-467: A conjunction of planets had caused "a great pestilence in the air" ( miasma theory ). Muslim religious scholars taught that the pandemic was a "martyrdom and mercy" from God, assuring the believer's place in paradise. For non-believers, it was a punishment. Some Muslim doctors cautioned against trying to prevent or treat a disease sent by God. Others adopted preventive measures and treatments for plague used by Europeans. These Muslim doctors also depended on

1215-728: A description of the disease modelled on Thucydides 's account of the 5th century BCE Plague of Athens , noting the spread of the Black Death by ship between maritime cities. Nicephorus Gregoras , while writing to Demetrios Kydones , described the rising death toll, the futility of medicine, and the panic of the citizens. The first outbreak in Constantinople lasted a year, but the disease recurred ten times before 1400. Carried by twelve Genoese galleys, plague arrived by ship in Sicily in October 1347;

1350-424: A disorganised slime layer of extracellular polymeric substances to a highly structured capsule . These structures can protect cells from engulfment by eukaryotic cells such as macrophages (part of the human immune system ). They can also act as antigens and be involved in cell recognition, as well as aiding attachment to surfaces and the formation of biofilms. The assembly of these extracellular structures

1485-413: A few micrometres in thickness to up to half a metre in depth, and may contain multiple species of bacteria, protists and archaea. Bacteria living in biofilms display a complex arrangement of cells and extracellular components, forming secondary structures, such as microcolonies , through which there are networks of channels to enable better diffusion of nutrients. In natural environments, such as soil or

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1620-415: A few species are visible to the unaided eye—for example, Thiomargarita namibiensis is up to half a millimetre long, Epulopiscium fishelsoni reaches 0.7 mm, and Thiomargarita magnifica can reach even 2 cm in length, which is 50 times larger than other known bacteria. Among the smallest bacteria are members of the genus Mycoplasma , which measure only 0.3 micrometres, as small as

1755-426: A fixed size and then reproduce through binary fission , a form of asexual reproduction . Under optimal conditions, bacteria can grow and divide extremely rapidly, and some bacterial populations can double as quickly as every 17 minutes. In cell division, two identical clone daughter cells are produced. Some bacteria, while still reproducing asexually, form more complex reproductive structures that help disperse

1890-418: A large domain of prokaryotic microorganisms . Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth , and are present in most of its habitats . Bacteria inhabit the air, soil, water, acidic hot springs , radioactive waste , and the deep biosphere of Earth's crust . Bacteria play a vital role in many stages of the nutrient cycle by recycling nutrients and

2025-408: A membrane-bound nucleus, and their genetic material is typically a single circular bacterial chromosome of DNA located in the cytoplasm in an irregularly shaped body called the nucleoid . The nucleoid contains the chromosome with its associated proteins and RNA . Like all other organisms , bacteria contain ribosomes for the production of proteins, but the structure of the bacterial ribosome

2160-528: A particular organism or group of organisms ( syntrophy ). Bacterial growth follows four phases. When a population of bacteria first enter a high-nutrient environment that allows growth, the cells need to adapt to their new environment. The first phase of growth is the lag phase , a period of slow growth when the cells are adapting to the high-nutrient environment and preparing for fast growth. The lag phase has high biosynthesis rates, as proteins necessary for rapid growth are produced. The second phase of growth

2295-415: A process called transformation . Many bacteria can naturally take up DNA from the environment, while others must be chemically altered in order to induce them to take up DNA. The development of competence in nature is usually associated with stressful environmental conditions and seems to be an adaptation for facilitating repair of DNA damage in recipient cells. Second, bacteriophages can integrate into

2430-524: A rue du Pipi. Pigs, cattle, chickens, geese, goats and horses roamed the streets of medieval London and Paris. Medieval homeowners were supposed to police their housefronts, including removing animal dung, but most urbanites were careless. William E. Cosner, a resident of the London suburb of Farringdon Without, received a complaint alleging that "men could not pass [by his house] for the stink [of] . . . horse dung and horse piss." One irate Londoner complained that

2565-425: A single continuous stretch of DNA. Although several different types of introns do exist in bacteria, these are much rarer than in eukaryotes. Bacteria, as asexual organisms, inherit an identical copy of the parent's genome and are clonal . However, all bacteria can evolve by selection on changes to their genetic material DNA caused by genetic recombination or mutations . Mutations arise from errors made during

2700-427: A single linear chromosome, while some Vibrio species contain more than one chromosome. Some bacteria contain plasmids , small extra-chromosomal molecules of DNA that may contain genes for various useful functions such as antibiotic resistance , metabolic capabilities, or various virulence factors . Bacteria genomes usually encode a few hundred to a few thousand genes. The genes in bacterial genomes are usually

2835-619: A small sporadic outbreak characteristic of transmission from rodents to humans with no wide-scale impact. According to Achtman, the dating of the plague suggests that it was not carried along the Silk Road , and its widespread appearance in that region probably postdates the European outbreak. Additionally, the Silk Road had already been heavily disrupted before the spread of the Black Death; Western and Middle Eastern traders found it difficult to trade on

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2970-649: A source of electrons and a substrate for carbon anabolism . In many ways, bacterial metabolism provides traits that are useful for ecological stability and for human society. For example, diazotrophs have the ability to fix nitrogen gas using the enzyme nitrogenase . This trait, which can be found in bacteria of most metabolic types listed above, leads to the ecologically important processes of denitrification , sulfate reduction , and acetogenesis , respectively. Bacterial metabolic processes are important drivers in biological responses to pollution ; for example, sulfate-reducing bacteria are largely responsible for

3105-529: A team led by Galina Eroshenko placed its origins more specifically in the Tian Shan mountains on the border between Kyrgyzstan and China. However more recent research notes that the previous sampling contained East Asian bias and that sampling since then has discovered strains of Y. pestis in the Caucasus region previously thought to be restricted to China. There is also no physical or specific textual evidence of

3240-785: A thick peptidoglycan cell wall like a Gram-positive bacterium, but also a second outer layer of lipids. In many bacteria, an S-layer of rigidly arrayed protein molecules covers the outside of the cell. This layer provides chemical and physical protection for the cell surface and can act as a macromolecular diffusion barrier . S-layers have diverse functions and are known to act as virulence factors in Campylobacter species and contain surface enzymes in Bacillus stearothermophilus . Flagella are rigid protein structures, about 20 nanometres in diameter and up to 20 micrometres in length, that are used for motility . Flagella are driven by

3375-417: A three- dimensional random walk . Bacterial species differ in the number and arrangement of flagella on their surface; some have a single flagellum ( monotrichous ), a flagellum at each end ( amphitrichous ), clusters of flagella at the poles of the cell ( lophotrichous ), while others have flagella distributed over the entire surface of the cell ( peritrichous ). The flagella of a group of bacteria,

3510-480: Is caused by a toxin released by the bacteria that grow from the spores. Clostridioides difficile infection , a common problem in healthcare settings, is caused by spore-forming bacteria. Bacteria exhibit an extremely wide variety of metabolic types. The distribution of metabolic traits within a group of bacteria has traditionally been used to define their taxonomy , but these traits often do not correspond with modern genetic classifications. Bacterial metabolism

3645-412: Is classified into nutritional groups on the basis of three major criteria: the source of energy , the electron donors used, and the source of carbon used for growth. Phototrophic bacteria derive energy from light using photosynthesis , while chemotrophic bacteria breaking down chemical compounds through oxidation , driving metabolism by transferring electrons from a given electron donor to

3780-536: Is dependent on bacterial secretion systems . These transfer proteins from the cytoplasm into the periplasm or into the environment around the cell. Many types of secretion systems are known and these structures are often essential for the virulence of pathogens, so are intensively studied. Some genera of Gram-positive bacteria, such as Bacillus , Clostridium , Sporohalobacter , Anaerobacter , and Heliobacterium , can form highly resistant, dormant structures called endospores . Endospores develop within

3915-534: Is determined by the bacterial cell wall and cytoskeleton and is important because it can influence the ability of bacteria to acquire nutrients, attach to surfaces, swim through liquids and escape predators . Multicellularity . Most bacterial species exist as single cells; others associate in characteristic patterns: Neisseria forms diploids (pairs), streptococci form chains, and staphylococci group together in "bunch of grapes" clusters. Bacteria can also group to form larger multicellular structures, such as

4050-441: Is different from that of eukaryotes and archaea. Some bacteria produce intracellular nutrient storage granules, such as glycogen , polyphosphate , sulfur or polyhydroxyalkanoates . Bacteria such as the photosynthetic cyanobacteria , produce internal gas vacuoles , which they use to regulate their buoyancy, allowing them to move up or down into water layers with different light intensities and nutrient levels. Around

4185-414: Is essential to the survival of many bacteria, and the antibiotic penicillin (produced by a fungus called Penicillium ) is able to kill bacteria by inhibiting a step in the synthesis of peptidoglycan. There are broadly speaking two different types of cell wall in bacteria, that classify bacteria into Gram-positive bacteria and Gram-negative bacteria . The names originate from the reaction of cells to

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4320-529: Is made of about 20 proteins, with approximately another 30 proteins required for its regulation and assembly. The flagellum is a rotating structure driven by a reversible motor at the base that uses the electrochemical gradient across the membrane for power. Bacteria can use flagella in different ways to generate different kinds of movement. Many bacteria (such as E. coli ) have two distinct modes of movement: forward movement (swimming) and tumbling. The tumbling allows them to reorient and makes their movement

4455-468: Is made primarily of phospholipids . This membrane encloses the contents of the cell and acts as a barrier to hold nutrients, proteins and other essential components of the cytoplasm within the cell. Unlike eukaryotic cells , bacteria usually lack large membrane-bound structures in their cytoplasm such as a nucleus , mitochondria , chloroplasts and the other organelles present in eukaryotic cells. However, some bacteria have protein-bound organelles in

4590-496: Is motile in liquid or solid media. Several Listeria and Shigella species move inside host cells by usurping the cytoskeleton , which is normally used to move organelles inside the cell. By promoting actin polymerisation at one pole of their cells, they can form a kind of tail that pushes them through the host cell's cytoplasm. A few bacteria have chemical systems that generate light. This bioluminescence often occurs in bacteria that live in association with fish, and

4725-481: Is needed to the range of (especially non- commensal ) animals that might be involved in the transmission of plague. Archaeologist Barney Sloane has argued that there is insufficient evidence of the extinction of numerous rats in the archaeological record of the medieval waterfront in London, and that the disease spread too quickly to support the thesis that Y. pestis was spread from fleas on rats; he argues that transmission must have been person to person. This theory

4860-557: Is still contested. It is speculated that rats aboard Zheng He 's ships in the 15th century may have carried the plague to Southeast Asia , India , and Africa. Research on the Delhi Sultanate and the Yuan dynasty shows no evidence of any serious epidemic in fourteenth-century India and no specific evidence of plague in 14th-century China, suggesting that the Black Death may not have reached these regions. Ole Benedictow argues that since

4995-528: Is supported by research in 2018 which suggested transmission was more likely by body lice and fleas during the second plague pandemic . Academic debate continues, but no single alternative explanation for the plague's spread has achieved widespread acceptance. Many scholars arguing for Y. pestis as the major agent of the pandemic suggest that its extent and symptoms can be explained by a combination of bubonic plague with other diseases, including typhus , smallpox , and respiratory infections . In addition to

5130-444: Is the stationary phase and is caused by depleted nutrients. The cells reduce their metabolic activity and consume non-essential cellular proteins. The stationary phase is a transition from rapid growth to a stress response state and there is increased expression of genes involved in DNA repair , antioxidant metabolism and nutrient transport . The final phase is the death phase where

5265-440: Is the logarithmic phase , also known as the exponential phase. The log phase is marked by rapid exponential growth . The rate at which cells grow during this phase is known as the growth rate ( k ), and the time it takes the cells to double is known as the generation time ( g ). During log phase, nutrients are metabolised at maximum speed until one of the nutrients is depleted and starts limiting growth. The third phase of growth

5400-676: Is the plural of the Neo-Latin bacterium , which is the Latinisation of the Ancient Greek βακτήριον ( baktḗrion ), the diminutive of βακτηρία ( baktēría ), meaning "staff, cane", because the first ones to be discovered were rod-shaped . The ancestors of bacteria were unicellular microorganisms that were the first forms of life to appear on Earth, about 4 billion years ago. For about 3 billion years, most organisms were microscopic, and bacteria and archaea were

5535-617: Is very old. Homer used it in the Odyssey to describe the monstrous Scylla , with her mouths "full of black Death" ( Ancient Greek : πλεῖοι μέλανος Θανάτοιο , romanized :  pleîoi mélanos Thanátoio ). Seneca the Younger may have been the first to describe an epidemic as 'black death', ( Latin : mors atra ) but only in reference to the acute lethality and dark prognosis of disease. The 12th–13th century French physician Gilles de Corbeil had already used atra mors to refer to

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5670-733: The Amtshaus , or town hall, was built in 1826. During the Second Schleswig War of 1864 Ahrensbök fell for a short time under the control of first the Austrians and then the Prussians. In 1867, a district court was established here. In the same year, after the Austro-Prussian War , the district of Ahrensbök was given to the Grand Duchy of Oldenburg as compensation for their hereditary claims on

5805-639: The Golden Horde army of Jani Beg in 1347. From Crimea, it was most likely carried by fleas living on the black rats that travelled on Genoese ships, spreading through the Mediterranean Basin and reaching North Africa , West Asia , and the rest of Europe via Constantinople , Sicily , and the Italian Peninsula . There is evidence that once it came ashore, the Black Death mainly spread from person-to-person as pneumonic plague , thus explaining

5940-468: The Gram stain , a long-standing test for the classification of bacterial species. Gram-positive bacteria possess a thick cell wall containing many layers of peptidoglycan and teichoic acids . In contrast, Gram-negative bacteria have a relatively thin cell wall consisting of a few layers of peptidoglycan surrounded by a second lipid membrane containing lipopolysaccharides and lipoproteins . Most bacteria have

6075-774: The Mamluk Sultanate , cultural center of the Islamic world , and the largest city in the Mediterranean Basin ; the Bahriyya child sultan an-Nasir Hasan fled and more than a third of the 600,000 residents died. The Nile was choked with corpses despite Cairo having a medieval hospital, the late 13th-century bimaristan of the Qalawun complex . The historian al-Maqrizi described the abundant work for grave-diggers and practitioners of funeral rites ; plague recurred in Cairo more than fifty times over

6210-604: The Roman Empire before the reign of Trajan , six centuries before arriving at Pelusium in the reign of Justinian I . In 2013, researchers confirmed earlier speculation that the cause of the Plague of Justinian (541–549 CE, with recurrences until 750) was Y . pestis . This is known as the first plague pandemic . In 610, the Chinese physician Chao Yuanfang described a "malignant bubo" "coming in abruptly with high fever together with

6345-476: The Y. pestis strain responsible for the Black Death as both the ancestor of later plague epidemics—including the third plague pandemic —and the descendant of the strain responsible for the Plague of Justinian . In addition, plague genomes from prehistory have been recovered. DNA taken from 25 skeletons from 14th-century London showed that plague is a strain of Y. pestis almost identical to that which hit Madagascar in 2013 . Further DNA evidence also proves

6480-624: The fixation of nitrogen from the atmosphere . The nutrient cycle includes the decomposition of dead bodies ; bacteria are responsible for the putrefaction stage in this process. In the biological communities surrounding hydrothermal vents and cold seeps , extremophile bacteria provide the nutrients needed to sustain life by converting dissolved compounds, such as hydrogen sulphide and methane , to energy. Bacteria also live in mutualistic , commensal and parasitic relationships with plants and animals. Most bacteria have not been characterised and there are many species that cannot be grown in

6615-628: The gavocciolo had been and still was an infallible token of approaching death, such also were these spots on whomsoever they showed themselves. This was followed by acute fever and vomiting of blood . Most people died two to seven days after initial infection. Freckle-like spots and rashes, which may have been caused by flea-bites , were identified as another potential sign of plague. Bacteria See § Phyla Bacteria ( / b æ k ˈ t ɪər i ə / ; sg. : bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell . They constitute

6750-549: The germ theory of disease . Until then streets were usually unhygienic, with live animals and human parasites facilitating the spread of transmissible disease . By the early 14th century, so much filth had collected inside urban Europe that French and Italian cities were naming streets after human waste. In medieval Paris, several street names were inspired by merde, the French word for "shit". There were rue Merdeux, rue Merdelet, rue Merdusson, rue des Merdons and rue Merdiere—as well as

6885-404: The poll tax of the year 1377. Estimates of plague victims are usually extrapolated from figures for the clergy. Mathematical modelling is used to match the spreading patterns and the means of transmission . In 2018 researchers suggested an alternative model in which "the disease was spread from human fleas and body lice to other people". The second model claims to better fit the trends of

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7020-444: The spirochaetes , are found between two membranes in the periplasmic space. They have a distinctive helical body that twists about as it moves. Two other types of bacterial motion are called twitching motility that relies on a structure called the type IV pilus , and gliding motility , that uses other mechanisms. In twitching motility, the rod-like pilus extends out from the cell, binds some substrate, and then retracts, pulling

7155-546: The vacuum and radiation of outer space , leading to the possibility that bacteria could be distributed throughout the Universe by space dust , meteoroids , asteroids , comets , planetoids , or directed panspermia . Endospore-forming bacteria can cause disease; for example, anthrax can be contracted by the inhalation of Bacillus anthracis endospores, and contamination of deep puncture wounds with Clostridium tetani endospores causes tetanus , which, like botulism ,

7290-443: The " Neolithic decline " around 3000 BCE, in which European populations fell significantly. This Y. pestis may have been different from more modern types, with bubonic plague transmissible by fleas first known from Bronze Age remains near Samara . The symptoms of bubonic plague are first attested in a fragment of Rufus of Ephesus preserved by Oribasius ; these ancient medical authorities suggest bubonic plague had appeared in

7425-737: The 14th century, as previously speculated. The Black Death was the second great natural disaster to strike Europe during the Late Middle Ages (the first one being the Great Famine of 1315–1317 ) and is estimated to have killed 30% to 60% of the European population, as well as approximately 33% of the population of the Middle East. There were further outbreaks throughout the Late Middle Ages and, also due to other contributing factors (the Crisis of

7560-481: The 15th and early 16th centuries, and in the 16th and 17th centuries was transferred to other languages as a calque : Icelandic : svarti dauði , German : der schwarze Tod , and French : la mort noire . Previously, most European languages had named the pandemic a variant or calque of the Latin : magna mortalitas , lit.   'Great Death'. The phrase 'black death' – describing Death as black –

7695-457: The 1640s. Nestorian gravesites dating from 1338 to 1339 near Issyk-Kul have inscriptions referring to plague, which has led some historians and epidemiologists to think they mark the outbreak of the epidemic ; this is supported by recent direct findings of Y. pestis DNA in teeth samples from graves in the area with inscriptions referring to "pestilence" as the cause of death. Epidemics killed an estimated 25 million across Asia during

7830-452: The 18th century, the event was called the "pestilence" or "great pestilence", "the plague" or the "great death". Subsequent to the pandemic "the furste moreyn " (first murrain ) or "first pestilence" was applied, to distinguish the mid-14th century phenomenon from other infectious diseases and epidemics of plague. The 1347 pandemic plague was not referred to specifically as "black" in the time of occurrence in any European language, though

7965-418: The Black Death in 14th century China. As a result, China's place in the sequence of the plague's spread is still debated to this day. According to Charles Creighton, records of epidemics in 14th-century China suggest nothing more than typhus and major Chinese outbreaks of epidemic disease post-date the European epidemic by several years. The earliest Chinese descriptions of the bubonic plague do not appear until

8100-506: The Black Death, because there were actually four strains of Yersinia pestis that became predominant in different parts of the world. Mongol records of illness such as food poisoning may have been referring to the Black Death. Another theory is that the plague originated near Europe and cycled through the Mediterranean, Northern Europe and Russia before making its way to China. Other historians, such as John Norris and Ole Benedictaw, believe

8235-568: The Fürstengrube death march. There is now a memorial here to the casualties. After World War II thousands of displaced persons and refugees were resettled here: the population rose from 5,063 in 1939 to 10,169 in 1950. During the local government reform of 1970 Ahrensbök together with the former Eutin district became part of the Ostholstein district. In 1972, the Grundschule and Hauptschule

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8370-781: The Gram-negative cell wall, and only members of the Bacillota group and actinomycetota (previously known as the low G+C and high G+C Gram-positive bacteria, respectively) have the alternative Gram-positive arrangement. These differences in structure can produce differences in antibiotic susceptibility; for instance, vancomycin can kill only Gram-positive bacteria and is ineffective against Gram-negative pathogens , such as Haemophilus influenzae or Pseudomonas aeruginosa . Some bacteria have cell wall structures that are neither classically Gram-positive or Gram-negative. This includes clinically important bacteria such as mycobacteria which have

8505-652: The Islamic city of Almería in al-Andalus . Mecca became infected in 1348 by pilgrims performing the Hajj . In 1351 or 1352, the Rasulid sultan of the Yemen , al-Mujahid Ali, was released from Mamluk captivity in Egypt and carried plague with him on his return home. During 1349, records show the city of Mosul suffered a massive epidemic, and the city of Baghdad experienced a second round of

8640-457: The Islamic world in 1347–52. However, there is a conspicuous lack of evidence for pandemic disease on the scale of the Black Death in China at this time. War and famine – and the diseases that typically accompanied them – probably were the main causes of mortality in the final decades of Mongol rule. Monica Green suggests that other parts of Eurasia outside the west do not contain the same evidence of

8775-470: The Late Middle Ages ), the European population did not regain its 14th century level until the 16th century. Outbreaks of the plague recurred around the world until the early 19th century. European writers contemporary with the plague described the disease in Latin as pestis or pestilentia , 'pestilence'; epidemia , 'epidemic'; mortalitas , 'mortality'. In English prior to

8910-501: The Lindenstrasse, which has been used since 1950 as a Mittelschule and Realschule . Also in 1928, the town celebrated its 600th anniversary. In 1933, Ahrensbök lost its municipal status and became a Gemeinde (community) with 19 villages within the boundaries as they now are. The district court was abolished. In April 1945, Jewish prisoners from Fürstengrube , a satellite camp of Auschwitz , were marched through Ahrensbök on

9045-585: The Silk Road by 1325 and impossible by 1340, making its role in the spread of plague less likely. There are no records of the symptoms of the Black Death from Mongol sources or writings from travelers east of the Black Sea prior to the Crimean outbreak in 1346. Others still favor an origin in China. The theory of Chinese origin implicates the Silk Road, the disease possibly spreading alongside Mongol armies and traders, or possibly arriving via ship—however, this theory

9180-519: The appearance of a bundle of nodes beneath the tissue." The Chinese physician Sun Simo who died in 652 also mentioned a "malignant bubo" and plague that was common in Lingnan ( Guangzhou ). Ole Jørgen Benedictow believes that this indicates it was an offshoot of the first plague pandemic which made its way eastward to Chinese territory by around 600. A report by the Medical Faculty of Paris stated that

9315-425: The archaeal/eukaryotic lineage. The most recent common ancestor (MRCA) of bacteria and archaea was probably a hyperthermophile that lived about 2.5 billion–3.2 billion years ago. The earliest life on land may have been bacteria some 3.22 billion years ago. Bacteria were also involved in the second great evolutionary divergence, that of the archaea and eukaryotes. Here, eukaryotes resulted from

9450-455: The atmosphere and one cubic metre of air holds around one hundred million bacterial cells. The oceans and seas harbour around 3 x 10 bacteria which provide up to 50% of the oxygen humans breathe. Only around 2% of bacterial species have been fully studied. Size . Bacteria display a wide diversity of shapes and sizes. Bacterial cells are about one-tenth the size of eukaryotic cells and are typically 0.5–5.0  micrometres in length. However,

9585-520: The bacteria have come into contact with in the past, which allows them to block virus replication through a form of RNA interference . Third, bacteria can transfer genetic material through direct cell contact via conjugation . In ordinary circumstances, transduction, conjugation, and transformation involve transfer of DNA between individual bacteria of the same species, but occasionally transfer may occur between individuals of different bacterial species, and this may have significant consequences, such as

9720-444: The bacteria perform separate tasks; for example, about one in ten cells migrate to the top of a fruiting body and differentiate into a specialised dormant state called a myxospore, which is more resistant to drying and other adverse environmental conditions. Biofilms . Bacteria often attach to surfaces and form dense aggregations called biofilms and larger formations known as microbial mats . These biofilms and mats can range from

9855-401: The bacteria run out of nutrients and die. Most bacteria have a single circular chromosome that can range in size from only 160,000 base pairs in the endosymbiotic bacteria Carsonella ruddii , to 12,200,000 base pairs (12.2 Mbp) in the soil-dwelling bacteria Sorangium cellulosum . There are many exceptions to this; for example, some Streptomyces and Borrelia species contain

9990-412: The bacterial chromosome, introducing foreign DNA in a process known as transduction . Many types of bacteriophage exist; some infect and lyse their host bacteria, while others insert into the bacterial chromosome. Bacteria resist phage infection through restriction modification systems that degrade foreign DNA and a system that uses CRISPR sequences to retain fragments of the genomes of phage that

10125-630: The beginning of the Neolithic , with flea-mediated strains emerging around 3,800 years ago during the late Bronze Age . The immediate territorial origins of the Black Death and its outbreak remain unclear, with some evidence pointing towards Central Asia , China, the Middle East , and Europe. The pandemic was reportedly first introduced to Europe during the siege of the Genoese trading port of Kaffa in Crimea by

10260-402: The bites of fleas whose midguts had become obstructed by replicating Y. pestis several days after feeding on an infected host. This blockage starves the fleas, drives them to aggressive feeding behaviour, and causes them to try to clear the blockage via regurgitation , resulting in thousands of plague bacteria flushing into the feeding site and infecting the host. The bubonic plague mechanism

10395-502: The breakdown of oil spills , the production of cheese and yogurt through fermentation , the recovery of gold, palladium , copper and other metals in the mining sector ( biomining , bioleaching ), as well as in biotechnology , and the manufacture of antibiotics and other chemicals. Once regarded as plants constituting the class Schizomycetes ("fission fungi"), bacteria are now classified as prokaryotes . Unlike cells of animals and other eukaryotes , bacterial cells do not contain

10530-471: The bubonic infection, others point to additional septicemic and pneumonic forms of plague, which lengthen the duration of outbreaks throughout the seasons and help account for its high mortality rate and additional recorded symptoms. In 2014, Public Health England announced the results of an examination of 25 bodies exhumed in the Clerkenwell area of London, as well as of wills registered in London during

10665-437: The cell forward. Motile bacteria are attracted or repelled by certain stimuli in behaviours called taxes : these include chemotaxis , phototaxis , energy taxis , and magnetotaxis . In one peculiar group, the myxobacteria, individual bacteria move together to form waves of cells that then differentiate to form fruiting bodies containing spores. The myxobacteria move only when on solid surfaces, unlike E. coli , which

10800-534: The city walls of Kaffa to infect the inhabitants, though it is also likely that infected rats travelled across the siege lines to spread the epidemic to the inhabitants. As the disease took hold, Genoese traders fled across the Black Sea to Constantinople , where the disease first arrived in Europe in summer 1347. The epidemic there killed the 13-year-old son of the Byzantine emperor , John VI Kantakouzenos , who wrote

10935-404: The completion of the dukes' new castle at Plön in 1636, after which Schloss Hoppenbrook became a secondary residence. In 1746, Duke Friedrich Karl abolished serfdom in his duchy. In 1765, after the death of his widow, the castle was demolished. A cattle and horse market was established in the town in 1791, which was replaced in 1832 by a regular weekly market. On the site of the former castle

11070-418: The continent. According to some epidemiologists, periods of unfavorable weather decimated plague-infected rodent populations, forcing their fleas onto alternative hosts, inducing plague outbreaks which often peaked in the hot summers of the Mediterranean and during the cool autumn months of the southern Baltic region . Among many other culprits of plague contagiousness, pre-existing malnutrition weakened

11205-629: The cytoplasm of the cell; generally, a single endospore develops in each cell. Each endospore contains a core of DNA and ribosomes surrounded by a cortex layer and protected by a multilayer rigid coat composed of peptidoglycan and a variety of proteins. Endospores show no detectable metabolism and can survive extreme physical and chemical stresses, such as high levels of UV light , gamma radiation , detergents , disinfectants , heat, freezing, pressure, and desiccation . In this dormant state, these organisms may remain viable for millions of years. Endospores even allow bacteria to survive exposure to

11340-419: The cytoplasm which compartmentalise aspects of bacterial metabolism, such as the carboxysome . Additionally, bacteria have a multi-component cytoskeleton to control the localisation of proteins and nucleic acids within the cell, and to manage the process of cell division . Many important biochemical reactions, such as energy generation, occur due to concentration gradients across membranes, creating

11475-580: The debate about the cause of the Black Death, and unambiguously demonstrates that Y. pestis was the causative agent of the epidemic plague that devastated Europe during the Middle Ages". In 2011 these results were further confirmed with genetic evidence derived from Black Death victims in the East Smithfield burial site in England. Schuenemann et al. concluded in 2011 "that the Black Death in medieval Europe

11610-669: The disease spread rapidly all over the island. Galleys from Kaffa reached Genoa and Venice in January 1348, but it was the outbreak in Pisa a few weeks later that was the entry point into northern Italy. Towards the end of January, one of the galleys expelled from Italy arrived in Marseilles . From Italy , the disease spread northwest across Europe, striking France , Spain , Portugal, and England by June 1348, then spreading east and north through Germany , Scotland and Scandinavia from 1348 to 1350. It

11745-544: The disease. Symptoms of the plague include fever of 38–41 °C (100–106 °F), headaches, painful aching joints , nausea and vomiting, and a general feeling of malaise . Left untreated, 80% of victims die within eight days. Contemporary accounts of the pandemic are varied and often imprecise. The most commonly noted symptom was the appearance of buboes (or gavocciolos ) in the groin, neck and armpits, which oozed pus and bled when opened. Boccaccio 's description: In men and women alike it first betrayed itself by

11880-411: The dominant forms of life. Although bacterial fossils exist, such as stromatolites , their lack of distinctive morphology prevents them from being used to examine the history of bacterial evolution, or to date the time of origin of a particular bacterial species. However, gene sequences can be used to reconstruct the bacterial phylogeny , and these studies indicate that bacteria diverged first from

12015-526: The elongated filaments of Actinomycetota species, the aggregates of Myxobacteria species, and the complex hyphae of Streptomyces species. These multicellular structures are often only seen in certain conditions. For example, when starved of amino acids, myxobacteria detect surrounding cells in a process known as quorum sensing , migrate towards each other, and aggregate to form fruiting bodies up to 500 micrometres long and containing approximately 100,000 bacterial cells. In these fruiting bodies,

12150-466: The emergence of certain tumours in the groin or armpits, some of which grew as large as a common apple, others as an egg ... From the two said parts of the body this deadly gavocciolo soon began to propagate and spread itself in all directions indifferently; after which the form of the malady began to change, black spots or livid making their appearance in many cases on the arm or the thigh or elsewhere, now few and large, now minute and numerous. As

12285-501: The energy released by the transfer of ions down an electrochemical gradient across the cell membrane. Fimbriae (sometimes called " attachment pili ") are fine filaments of protein, usually 2–10 nanometres in diameter and up to several micrometres in length. They are distributed over the surface of the cell, and resemble fine hairs when seen under the electron microscope . Fimbriae are believed to be involved in attachment to solid surfaces or to other cells, and are essential for

12420-597: The entering of ancient bacteria into endosymbiotic associations with the ancestors of eukaryotic cells, which were themselves possibly related to the Archaea. This involved the engulfment by proto-eukaryotic cells of alphaproteobacterial symbionts to form either mitochondria or hydrogenosomes , which are still found in all known Eukarya (sometimes in highly reduced form , e.g. in ancient "amitochondrial" protozoa). Later, some eukaryotes that already contained mitochondria also engulfed cyanobacteria -like organisms, leading to

12555-641: The evolution of different growth strategies (see r/K selection theory ). Some organisms can grow extremely rapidly when nutrients become available, such as the formation of algal and cyanobacterial blooms that often occur in lakes during the summer. Other organisms have adaptations to harsh environments, such as the production of multiple antibiotics by Streptomyces that inhibit the growth of competing microorganisms. In nature, many organisms live in communities (e.g., biofilms ) that may allow for increased supply of nutrients and protection from environmental stresses. These relationships can be essential for growth of

12690-464: The expression "black death" had occasionally been applied to fatal disease beforehand. "Black death" was not used to describe the plague pandemic in English until the 1750s; the term is first attested in 1755, where it translated Danish : den sorte død , lit.   'the black death'. This expression as a proper name for the pandemic had been popularized by Swedish and Danish chroniclers in

12825-484: The fifteen years before the Black Death reached Constantinople in 1347. The evidence does not suggest, at least at present, that these mortality crises were caused by plague. Although some scholars, including McNeill and Cao, see the 1333 outbreak as a prelude to the outbreaks in Europe from the late 1340s to the early 1350s, scholars of the Yuan and Ming periods remain skeptical about such an interpretation. Nonetheless,

12960-456: The first clear reports of the Black Death come from Kaffa , the Black Death most likely originated in the nearby plague focus on the northwestern shore of the Caspian Sea . Demographic historians estimate that China's population fell by at least 15 per cent, and perhaps as much as a third, between 1340 and 1370. This population loss coincided with the Black Death that ravaged Europe and much of

13095-487: The following one and a half centuries. During 1347, the disease travelled eastward to Gaza by April; by July it had reached Damascus , and in October plague had broken out in Aleppo . That year, in the territory of modern Lebanon , Syria , Israel , and Palestine , the cities of Ascalon , Acre , Jerusalem , Sidon , and Homs were all infected. In 1348–1349, the disease reached Antioch . The city's residents fled to

13230-566: The formation of chloroplasts in algae and plants. This is known as primary endosymbiosis . Bacteria are ubiquitous, living in every possible habitat on the planet including soil, underwater, deep in Earth's crust and even such extreme environments as acidic hot springs and radioactive waste. There are thought to be approximately 2×10 bacteria on Earth, forming a biomass that is only exceeded by plants. They are abundant in lakes and oceans, in arctic ice, and geothermal springs where they provide

13365-453: The gut. However, several species of bacteria are pathogenic and cause infectious diseases , including cholera , syphilis , anthrax , leprosy , tuberculosis , tetanus and bubonic plague . The most common fatal bacterial diseases are respiratory infections . Antibiotics are used to treat bacterial infections and are also used in farming, making antibiotic resistance a growing problem. Bacteria are important in sewage treatment and

13500-469: The immune response, contributing to an immense decline in European population. The disease struck various regions in the Middle East and North Africa during the pandemic , leading to serious depopulation and permanent change in both economic and social structures. By autumn 1347, plague had reached Alexandria in Egypt, transmitted by sea from Constantinople via a single merchant ship carrying slaves. By late summer 1348, it reached Cairo , capital of

13635-409: The laboratory. The study of bacteria is known as bacteriology , a branch of microbiology . Like all animals, humans carry vast numbers (approximately 10 to 10 ) of bacteria. Most are in the gut , though there are many on the skin. Most of the bacteria in and on the body are harmless or rendered so by the protective effects of the immune system , and many are beneficial , particularly the ones in

13770-627: The largest viruses . Some bacteria may be even smaller, but these ultramicrobacteria are not well-studied. Shape . Most bacterial species are either spherical, called cocci ( singular coccus , from Greek kókkos , grain, seed), or rod-shaped, called bacilli ( sing . bacillus, from Latin baculus , stick). Some bacteria, called vibrio , are shaped like slightly curved rods or comma-shaped; others can be spiral-shaped, called spirilla , or tightly coiled, called spirochaetes . A small number of other unusual shapes have been described, such as star-shaped bacteria. This wide variety of shapes

13905-716: The light probably serves to attract fish or other large animals. Bacteria often function as multicellular aggregates known as biofilms , exchanging a variety of molecular signals for intercell communication and engaging in coordinated multicellular behaviour. The communal benefits of multicellular cooperation include a cellular division of labour , accessing resources that cannot effectively be used by single cells, collectively defending against antagonists, and optimising population survival by differentiating into distinct cell types. For example, bacteria in biofilms can have more than five hundred times increased resistance to antibacterial agents than individual "planktonic" bacteria of

14040-439: The most significant events in European history, the Black Death had far-reaching population, economic, and cultural impacts. It was the beginning of the second plague pandemic . The plague created religious, social and economic upheavals, with profound effects on the course of European history. The origin of the Black Death is disputed. Genetic analysis suggests Yersinia pestis bacteria evolved approximately 7,000 years ago, at

14175-550: The name atra mors for the 14th-century epidemic first appeared in a 1631 book on Danish history by J. I. Pontanus : "Commonly and from its effects, they called it the black death" ( Vulgo & ab effectu atram mortem vocitabant ). Research from 2017 suggests plague first infected humans in Europe and Asia in the Late Neolithic - Early Bronze Age . Research in 2018 found evidence of Yersinia pestis in an ancient Swedish tomb, which may have been associated with

14310-417: The newly formed daughter cells. Examples include fruiting body formation by myxobacteria and aerial hyphae formation by Streptomyces species, or budding. Budding involves a cell forming a protrusion that breaks away and produces a daughter cell. In the laboratory, bacteria are usually grown using solid or liquid media. Solid growth media , such as agar plates , are used to isolate pure cultures of

14445-463: The newly-Prussian territory of Holstein . On 3 September 1872, a great fire destroyed 22 houses and 10 other structures in Ahrensbök. In 1877, the area was divided in two, an urban district and a rural district. The railway line from Ahrensbök to Pönitz was opened with much ceremony in 1886. Between 1912 and 1933, Ahrensbök held the status of "Town (2nd Class)". In 1928, a private school was built in

14580-576: The north, but most of them ended up dying during the journey. Within two years, the plague had spread throughout the Islamic world, from Arabia across North Africa. The pandemic spread westwards from Alexandria along the African coast, while in April 1348 Tunis was infected by ship from Sicily. Tunis was then under attack by an army from Morocco; this army dispersed in 1348 and brought the contagion with them to Morocco, whose epidemic may also have been seeded from

14715-473: The nutrients needed to sustain life by converting dissolved compounds, such as hydrogen sulphide and methane , to energy. They live on and in plants and animals. Most do not cause diseases, are beneficial to their environments, and are essential for life. The soil is a rich source of bacteria and a few grams contain around a thousand million of them. They are all essential to soil ecology, breaking down toxic waste and recycling nutrients. They are even found in

14850-475: The outside of the cell membrane is the cell wall . Bacterial cell walls are made of peptidoglycan (also called murein), which is made from polysaccharide chains cross-linked by peptides containing D- amino acids . Bacterial cell walls are different from the cell walls of plants and fungi , which are made of cellulose and chitin , respectively. The cell wall of bacteria is also distinct from that of achaea, which do not contain peptidoglycan. The cell wall

14985-550: The people that scarce the tenth person of any sort was left alive. Geoffrey the Baker , Chronicon Angliae Plague was reportedly first introduced to Europe via Genoese traders from their port city of Kaffa in the Crimea in 1347. During a protracted siege of the city in 1345–1346, the Mongol Golden Horde army of Jani Beg —whose mainly Tatar troops were suffering from the disease— catapulted infected corpses over

15120-408: The period, which supported the pneumonic hypothesis. Currently, while osteoarcheologists have conclusively verified the presence of Y. pestis bacteria in burial sites across northern Europe through examination of bones and dental pulp , no other epidemic pathogen has been discovered to bolster the alternative explanations. The importance of hygiene was not recognized until the 19th century and

15255-657: The plague likely originated in Europe or the Middle East, and never reached China. Norris specifically argues for an origin in Kurdistan rather than Central Asia. The seventh year after it began, it came to England and first began in the towns and ports joining on the seacoasts, in Dorsetshire , where, as in other counties, it made the country quite void of inhabitants so that there were almost none left alive. ... But at length it came to Gloucester , yea even to Oxford and to London, and finally it spread over all England and so wasted

15390-475: The plague to an astrological conjunction of Jupiter and Saturn. His use of the phrase is not connected unambiguously with the plague pandemic of 1347 and appears to refer to the fatal outcome of disease. The historian Cardinal Francis Aidan Gasquet wrote about the Great Pestilence in 1893 and suggested that it had been "some form of the ordinary Eastern or bubonic plague". In 1908, Gasquet said use of

15525-526: The plague's death toll, as the rat-flea-human hypothesis would have produced a delayed but very high spike in deaths, contradicting historical death data. Lars Walløe argued that these authors "take it for granted that Simond's infection model, black rat → rat flea → human, which was developed to explain the spread of plague in India, is the only way an epidemic of Yersinia pestis infection could spread". Similarly, Monica Green has argued that greater attention

15660-401: The presence of DNA / RNA with polymerase chain reaction (PCR) techniques for Y. pestis from the tooth sockets in human skeletons from mass graves in northern, central and southern Europe that were associated archaeologically with the Black Death and subsequent resurgences. The authors concluded that this new research, together with prior analyses from the south of France and Germany, "ends

15795-612: The production of the highly toxic forms of mercury ( methyl- and dimethylmercury ) in the environment. Nonrespiratory anaerobes use fermentation to generate energy and reducing power, secreting metabolic by-products (such as ethanol in brewing) as waste. Facultative anaerobes can switch between fermentation and different terminal electron acceptors depending on the environmental conditions in which they find themselves. Unlike in multicellular organisms, increases in cell size ( cell growth ) and reproduction by cell division are tightly linked in unicellular organisms. Bacteria grow to

15930-403: The quick inland spread of the epidemic, which was faster than would be expected if the primary vector was rat fleas causing bubonic plague. In 2022, it was discovered that there was a sudden surge of deaths in what is today Kyrgyzstan from the Black Death in the late 1330s; when combined with genetic evidence, this implies that the initial spread may not have been due to Mongol conquests in

16065-605: The remarkably high mortality rates during the Datong mortality should discourage us from rejecting the possibility of localized/regional outbreaks of plague in different parts of China, albeit differing in scale from, and unrelated to, the pandemic mortality of the Black Death. What we lack is any indication of a plague pandemic that engulfed vast territories of the Yuan Empire and later moved into western Eurasia through Central Asia. According to John Norris, evidence from Issyk-Kul indicates

16200-560: The replication of DNA or from exposure to mutagens . Mutation rates vary widely among different species of bacteria and even among different clones of a single species of bacteria. Genetic changes in bacterial genomes emerge from either random mutation during replication or "stress-directed mutation", where genes involved in a particular growth-limiting process have an increased mutation rate. Some bacteria transfer genetic material between cells. This can occur in three main ways. First, bacteria can take up exogenous DNA from their environment in

16335-532: The role of Y. pestis and traces the source to the Tian Shan mountains in Kyrgyzstan . Researchers are hampered by a lack of reliable statistics from this period. Most work has been done on the spread of the disease in England, where estimates of overall population at the start of the plague vary by over 100%, as no census was undertaken in England between the time of publication of the Domesday Book of 1086 and

16470-420: The runoff from the local slaughterhouse had made his garden "stinking and putrid", while another charged that the blood from slain animals flooded nearby streets and lanes, "making a foul corruption and abominable sight to all dwelling near." In much of medieval Europe, sanitation legislation consisted of an ordinance requiring homeowners to shout, "Look out below!" three times before dumping a full chamber pot into

16605-530: The same species. One type of intercellular communication by a molecular signal is called quorum sensing , which serves the purpose of determining whether the local population density is sufficient to support investment in processes that are only successful if large numbers of similar organisms behave similarly, such as excreting digestive enzymes or emitting light. Quorum sensing enables bacteria to coordinate gene expression and to produce, release, and detect autoinducers or pheromones that accumulate with

16740-435: The street. Early Christians considered bathing a temptation. With this danger in mind, St. Benedict declared, "To those who are well, and especially to the young, bathing shall seldom be permitted." St. Agnes took the injunction to heart and died without ever bathing. According to a team of medical geneticists led by Mark Achtman , Yersinia pestis "evolved in or near China" over 2,600 years ago. Later research by

16875-412: The surfaces of plants, the majority of bacteria are bound to surfaces in biofilms. Biofilms are also important in medicine, as these structures are often present during chronic bacterial infections or in infections of implanted medical devices , and bacteria protected within biofilms are much harder to kill than individual isolated bacteria. The bacterial cell is surrounded by a cell membrane , which

17010-457: The terminal electron acceptor, while anaerobic organisms use other compounds such as nitrate , sulfate , or carbon dioxide. Many bacteria, called heterotrophs , derive their carbon from other organic carbon . Others, such as cyanobacteria and some purple bacteria , are autotrophic , meaning they obtain cellular carbon by fixing carbon dioxide . In unusual circumstances, the gas methane can be used by methanotrophic bacteria as both

17145-447: The transfer of antibiotic resistance. In such cases, gene acquisition from other bacteria or the environment is called horizontal gene transfer and may be common under natural conditions. Many bacteria are motile (able to move themselves) and do so using a variety of mechanisms. The best studied of these are flagella , long filaments that are turned by a motor at the base to generate propeller-like movement. The bacterial flagellum

17280-495: The virulence of some bacterial pathogens. Pili ( sing . pilus) are cellular appendages, slightly larger than fimbriae, that can transfer genetic material between bacterial cells in a process called conjugation where they are called conjugation pili or sex pili (see bacterial genetics, below). They can also generate movement where they are called type IV pili . Glycocalyx is produced by many bacteria to surround their cells, and varies in structural complexity: ranging from

17415-470: The western United States. Y. pestis was discovered by Alexandre Yersin , a pupil of Louis Pasteur , during an epidemic of bubonic plague in Hong Kong in 1894; Yersin also proved this bacterium was present in rodents and suggested the rat was the main vehicle of transmission. The mechanism by which Y. pestis is usually transmitted was established in 1898 by Paul-Louis Simond and was found to involve

17550-486: The writings of the ancient Greeks. Due to climate change in Asia , rodents began to flee the dried-out grasslands to more populated areas, spreading the disease. The plague disease, caused by the bacterium Yersinia pestis , is enzootic (commonly present) in populations of fleas carried by ground rodents , including marmots , in various areas, including Central Asia , Kurdistan , West Asia , North India , Uganda , and

17685-487: Was also dependent on two populations of rodents: one resistant to the disease, which act as hosts , keeping the disease endemic , and a second that lacks resistance. When the second population dies, the fleas move on to other hosts, including people, thus creating a human epidemic . Definitive confirmation of the role of Y. pestis arrived in 2010 with a publication in PLOS Pathogens by Haensch et al. They assessed

17820-452: Was caused by a variant of Y. pestis that may no longer exist". Later in 2011, Bos et al. reported in Nature the first draft genome of Y. pestis from plague victims from the same East Smithfield cemetery and indicated that the strain that caused the Black Death is ancestral to most modern strains of Y. pestis . Later genomic papers have further confirmed the phylogenetic placement of

17955-448: Was closed. Black Death The Black Death was a bubonic plague pandemic that occurred in Europe from 1346 to 1353. It was one of the most fatal pandemics in human history; as many as 50 million people perished, perhaps 50% of Europe's 14th century population. The disease is caused by the bacterium Yersinia pestis and spread by fleas and through the air. One of

18090-519: Was introduced into Norway in 1349 when a ship landed at Askøy , then spread to Bjørgvin (modern Bergen ). Finally, it spread to northern Russia in 1352 and reached Moscow in 1353. Plague was less common in parts of Europe with less-established trade relations, including the majority of the Basque Country , isolated parts of Belgium and the Netherlands , and isolated Alpine villages throughout

18225-507: Was re-established as a village group school ( Dörfergemeinschaftsschule ), when the separate village schools were closed. In 1982, the ZOB plant was built in the Lindenstrasse. Since March 1985 the local government administration of the Gemeinde has been accommodated in the new town hall ( Rathaus ) near the site of the former castle and the Amtshaus (demolished in 1983). In 1988, the railway line

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