Bubonic plague

This article is about the disease in general. For information about the medieval European plague, see Black Death.

Bubonic plague
Specialty	Infectious diseases

Bubonic plague is a zoonotic disease, circulating mainly among small rodents and their fleas, and is one of three types of bacterial infections caused by Yersinia pestis (formerly known as Pasteurella pestis), which belongs to the family Enterobacteriaceae. Without treatment, the bubonic plague kills about two thirds of infected humans within 4 days.

The term bubonic plague is derived from the Greek word βουβών, meaning "groin." Swollen lymph nodes (buboes) especially occur in the armpit and groin in persons suffering from bubonic plague. Bubonic plague was often used synonymously for plague, but it does in fact refer specifically to an infection that enters through the skin and travels through the lymphatics, as is often seen in flea-borne infections.

Bubonic plague—along with the septicemic plague and the pneumonic plague, which are the two other manifestations of Y. pestis—is generally believed to be the cause of the Black Death that swept through Europe in the 14th century and killed an estimated 25 million people, or 30–60% of the European population. Because the plague killed so many of the working population, wages rose and some historians have seen this as a turning point in European economic development.

Signs and symptoms

Acral necrosis of the nose, the lips, and the fingers and residual ecchymoses over both forearms in a patient recovering from bubonic plague that disseminated to the blood and the lungs. At one time, the patient's entire body was ecchymotic. Reprinted from Textbook of Military Medicine.

The most infamous symptom of bubonic plague is an infection of the lymph glands (lymphadenitis), which become swollen and painful and are known as buboes. After being transmitted via the bite of an infected flea the Y. pestis bacteria become localized in an inflamed lymph node where they begin to colonize and reproduce. Buboes associated with the bubonic plague are commonly found in the armpits, upper femoral, groin and neck region. Acral gangrene (i.e. of the fingers, toes, lips and nose), is another common symptom.

Due to its bite-based form of infection, the bubonic plague is often the first step of a progressive series of illnesses. Bubonic plague symptoms appear suddenly, usually 2–5 days after exposure to the bacteria. Symptoms include:

• Acral gangrene: Gangrene of the extremities such as toes, fingers, lips and tip of the nose.
• Chills
• General ill feeling (malaise)
• High fever (39 °Celsius; 102 °Fahrenheit)
• Muscle Cramps
• Seizures
• Smooth, painful lymph gland swelling called a buboe, commonly found in the groin, but may occur in the armpits or neck, most often at the site of the initial infection (bite or scratch)
• Pain may occur in the area before the swelling appears
• Skin color changes to a pink hue in some very extreme cases

Other symptoms include heavy breathing, continuous vomiting of blood (hematemesis), aching limbs, coughing, and extreme pain. The pain is usually caused by the decay or decomposition of the skin while the person is still alive. Additional symptoms include extreme fatigue, gastrointestinal problems, lenticulae (black dots scattered throughout the body), delirium and coma.

Two other types of Y. pestis plague are pneumonic and septicemic. Pneumonic plague, unlike the bubonic or septicemic, induces coughing and is very infectious, allowing it to be spread person to person.

Pathophysiology

Oriental rat flea (Xenopsylla cheopis) infected with the Yersinia pestis bacterium which appears as a dark mass in the gut. The foregut of this flea is blocked by a Y. pestis biofilm; when the flea attempts to feed on an uninfected host Y. pestis from the foregut is regurgitated into the wound, causing infection.

Bubonic plague is an infection of the lymphatic system, usually resulting from the bite of an infected flea, Xenopsylla cheopis (the rat flea). In very rare circumstances, as in the septicemic plague, the disease can be transmitted by direct contact with infected tissue or exposure to the cough of another human. The fleas are often found on rodents such as rats and mice, and seek out other prey when their rodent hosts die. The bacteria began its life harmlessly living in the digestive tracts of mammals. The ability to propagate was dependent only upon its ability to travel from mammal host to mammal host. The bacteria remained harmless to the flea, allowing the new host to spread the bacteria. The bacteria form aggregates in the gut of infected fleas and this results in the flea regurgitating ingested blood, which is now infected, into the bite site of a rodent or human host. Once established, bacteria rapidly spread to the lymph nodes and multiply.

Y. pestis bacilli can resist phagocytosis and even reproduce inside phagocytes and kill them. As the disease progresses, the lymph nodes can haemorrhage and become swollen and necrotic. Bubonic plague can progress to lethal septicemic plague in some cases. The plague is also known to spread to the lungs and become the disease known as the pneumonic plague, This form of the disease is highly communicable as the bacteria can be transmitted in droplets emitted when coughing or sneezing.

Treatment

Several classes of antibiotics are effective in treating bubonic plague. These include aminoglycosides such as streptomycin and gentamicin, tetracyclines (especially doxycycline), and the fluoroquinolone ciprofloxacin. Mortality associated with treated cases of bubonic plague is about 1-15%, compared to a mortality rate of 50-90% in untreated cases.

People potentially infected with the plague need immediate treatment and should be given antibiotics within 24 hours of the first symptoms to prevent death. Other treatments include oxygen, intravenous fluids, and respiratory support. This Plague is totally unharmless if you do get bitten by the Oriental Rat Flea dont worry it is only gonna hurt alot. People who have had contact with anyone infected by pneumonic plague are given prophylactic antibiotics. Using the broad-based antibiotic streptomycin has proven to be dramatically successful against the bubonic plague within 12 hours of infection.

Laboratory testing

Laboratory testing is required, in order to diagnose and confirm plague. Ideally, confirmation is through the identification of Y. pestis culture from a patient sample. Confirmation of infection can be done by examining serum taken during the early and late stages of infection. To quickly screen for the Y. pestis antigen in patients, rapid dipstick tests have been developed for field use.

History

Early outbreaks

Bubonic plague victims in a mass grave from 1720-1721 in Martigues, France

From a series of images showing the areas in Sydney affected by the outbreak of Bubonic Plague in 1900. Taken by Mr. John Degotardi, Jr., photographer from the Department of Public Works, the images depict the state of the houses and 'slum' buildings at the time of the outbreak and the cleansing and disinfecting operations which followed.

Main articles: Plague of Justinian, Black Death, and Third plague pandemic

The first recorded epidemic ravaged the Byzantine Empire during the sixth century, and was named the Plague of Justinian after emperor Justinian I, who was infected but survived through extensive treatment. The epidemic is estimated to have killed approximately 25 million people in the Roman Empire alone. The historian Procopius wrote, in Volume II of History of the Wars, his encounter with the plague and the effect it had on the rising empire. In the spring of 542, the plague arrived in Constantinople, working its way from port city to port city and spreading through the Mediterranean, later migrating inland eastward into Asia Minor and west into Greece and Italy. Because the infectious disease spread inland by the transferring of merchandise through Justinian’s efforts in acquiring luxurious goods of the time and exporting supplies, his capital became the leading exporter of the Bubonic plague. Procopius, in his work Secret History, declared that Justinian was a demon of an emperor who either created the plague himself or was being punished for his sinfulness.

Black Death

Main article: Black Death

In the Late Middle Ages (1340-1400) Europe experienced the most deadly disease outbreak in Western history when the Black Death, the infamous pandemic of bubonic plague, hit in 1347, killing a third of the human population. It is commonly believed that society subsequently became more violent as the mass mortality rate cheapened life and thus increased warfare, crime, popular revolt, waves of flagellants, and persecution. The Black Death originated in or near China and spread from Italy and then throughout other European countries. Research published in 2002 suggests that it began in the spring of 1346 in the steppe region, where a plague reservoir stretches from the north-western shore of the Caspian Sea into southern Russia. The Mongols had cut off the trade route, the Silk Road, between China and Europe which halted spread of the Black Death from the east Russia towards Western Europe. The epidemic began with an attack that Mongols launched on the Italian merchant's last trading station in the region, Caffa in the Crimea. In the autumn of 1346, plague broke out among the besiegers and from them penetrated into the town. When spring arrived, the Italian merchants fled on their ships, unknowingly carrying the Black Death. Carried by the fleas on rats, the plague initially spread to humans near the Black Sea and then outwards to the rest of Europe as a result of people fleeing from one area to another.

There were many ethno-medical beliefs of prevention methods for avoiding the Black Death. One of the most famous ideas was that by walking around with flowers in or around their nose people would be able to "ward off the stench and perhaps the evil that afflicted them." There were also many religious prevention methods. One such method used was to carve the symbol of the cross onto the front door of a house with the words "Lord have mercy on us" near it.

Pistoia, a city in Italy, even went as far as enacting rules and regulations on the city and its inhabitants to keep it safe from the Black Death. The rules stated that no one was allowed to visit any plague-infected area and if they did they were not allowed back into the city. Some other rules were that no linen or woollen goods were to be imported into the city and no corpses were to be buried in the city. However, despite strict enforcement of the rules, the city eventually became infected.

Religion, specifically last rites, was one of the most important things to people during the Black Death. However, during the days of the plague, last rites were becoming harder and harder to receive and the amount charged for such services increased. In the beginning of the plague there were not enough clergymen to offer last rites to everyone and eventually, by the end, plague victims were simply denied last rites because the remaining holy men did not want to contract the fatal disease.

While Europe was devastated by the disease, the rest of the world fared much better. In India, populations rose from a population of 91 million in 1300, to 97 million in 1400, to 105 million in 1500. Also sub-Saharan Africa and Scandinavia remained largely unaffected by the plagues.

Traditional treatment

Main article: Miasma theory

Medieval doctors thought the plague was created by air corrupted by humid weather, decaying unburied bodies, and fumes produced by poor sanitation. The recommended treatment of the plague was a good diet, rest, and relocating to a non-infected environment so the individual could get access to clean air. This did help, but not for the reasons the doctors of the time thought. In actuality, because they recommended moving away from unsanitary conditions, people were, in effect, getting away from the rodents that harbored the fleas carrying the infection. This also helped to spread the infection to new areas previously non-infected.

Later outbreaks

Directions for searchers, Poona (now Pune) plague of 1897

The next few centuries were marked by several local outbreaks of lesser severity. The Great Plague of Seville (1647), the Great Plague of London (1665–1666), the Great Plague of Vienna (1679), Great Plague of Riga (1710) and the Great Plague of Marseilles (1720), were the last major outbreaks of the bubonic plague in Europe.

The plague resurfaced in the mid-19th century; like the Black Death, the Third Pandemic began in Central Asia. The disease killed millions in China and India — mostly a British possession at the time — and then spread worldwide. The outbreak continued into the early 20th century. In 1897, the city of Poona (now Pune) in India was severely affected by the outbreak.

In 1899, the islands of Hawaii were also hit by the plague. The first evidence of the disease was found in Honolulu's Chinatown on Oahu. It was located very close to the island's piers, and rats in cargo ships from China were able to land on the Hawaiian islands unseen. As the rats, hosts for disease-carrying fleas, made their way deeper into the city, people started to fall ill. On December 12, 1899, the first case was confirmed. The Board of Health then quickly thought of ways to prevent the disease from spreading even further inland. Their solution was to burn down any buildings in Chinatown suspected of containing a source of the disease. On December 31, 1899, the board set the first fire. They had originally planned to burn only a few targeted buildings, and thought they could control the flames as each building was finished, but the fire got out of control, burning down un-targeted neighboring buildings. The resulting fire caused many of Chinatown's homes to be destroyed and an estimated 4,000 people were left homeless.

Australia suffered 12 major plague outbreaks between 1900 and 1925 originating from shipping. Research by Australian medical officers Thompson, Armstrong and Tidswell contributed to understanding the spread of Yersinia pestis to humans by fleas from infected rats.

In 1994, a plague outbreak in five Indian states caused an estimated 700 infections (including 52 deaths) and triggered a large migration of Indians within India as they tried to avoid the plague.

In 1994 and 2010 cases were reported in Peru. In 2010 a case was reported in Oregon, United States.

In 2012, cases were reported in Oregon and Colorado, including a 7-year-old girl who contracted Bubonic plague while camping in southwest Colorado.

In September 2012 a herdsman in China (Sichuan province, Garzê Tibetan Autonomous Prefecture) was reported to have died of the disease after finding a dead marmot and eating it.

Biological warfare

Some of the earliest instances of biological warfare were said to have been product of the plague, as armies of the 14th century were recorded catapulting diseased corpses over the walls of towns and villages in order to spread the pestilence.

Later, plague was used during the Second Sino-Japanese War as a bacteriological weapon by the Imperial Japanese Army. These weapons were provided by Shirō Ishii's units and used in experiments on humans before being used on the field. For example, in 1940, the Imperial Japanese Army Air Service bombed Ningbo with fleas carrying the bubonic plague. During the Khabarovsk War Crime Trials, the accused, such as Major General Kiyashi Kawashima, testified that, in 1941, some 40 members of Unit 731 air-dropped plague-contaminated fleas on Changde. These operations caused epidemic plague outbreaks.

See also

• List of cutaneous conditions
• List of epidemics
• Miasma theory
• Plague doctor
• Plague doctor costume

References

• Echenberg, Myron J. (2007). Plague Ports: The Global Urban Impact of Bubonic Plague, 1894-1901. New York, NY: New York University Press. ISBN 0-8147-2232-6. OCLC 70292105.
• Little, Lester K. (2007). "Life and Afterlife of the First Plague Pandemic." In: Little, Lester K. editor. (2007), Plague and the End of Antiquity: The Pandemic of 541–750. Cambridge University Press. (2007). ISBN 978-0-521-84639-4 (hardback); ISBN 978-0-521-71897-4 (paperback).
• McCormick, Michael (2007). "Toward a Molecular History of the Justinian Pandemic." In: Little, Lester K. editor. (2007), Plague and the End of Antiquity: The Pandemic of 541–750. Cambridge University Press. (2007). ISBN 978-0-521-84639-4 (hardback); ISBN 978-0-521-71897-4 (paperback).
• "Bubonic Plague Originated in China", Discovery News,1 November 2010. Retrieved on 6 December 2011.
• "Bubonic Plague Fire Destroyed Honolulu's Chinatown" Hawaii for Visitors. Retrieved on 6 December 2011.
• "Bubonic Plauge and the Chinatown Fire Honolulu Advertiser, 7 July 2005. Retrieved on 6 December 2011.

Further reading

Books

• Alexander, John T. (2003, 1980). Bubonic Plague in Early Modern Russia: Public Health and Urban Disaster. Oxford, UK; New York, NY: Oxford University Press. ISBN 0-19-515818-0. OCLC 50253204. {{cite book}}: Check date values in: |year= (help)
• Carol, Benedict (1996). Bubonic Plague in Nineteenth-Century China. Stanford, CA: Stanford University Press. ISBN 0-8047-2661-2. OCLC 34191853.
• Biddle, Wayne (2002). A Field Guide to Germs (2nd Anchor Books ed.). New York: Anchor Books. ISBN 1-4000-3051-X. OCLC 50154403.
• Little, Lester K. (2007). Plague and the End of Antiquity: The Pandemic of 541-750. New York, NY: Cambridge University Press. ISBN 978-0-521-84639-4. OCLC 65361042.
• Rosen, William (2007). Justinian's Flea: Plague, Empire and the Birth of Europe. London, England: Viking Penguin. ISBN 978-0-670-03855-8.
• Scott, Susan, and C. J. Duncan (2001). Biology of Plagues: Evidence from Historical Populations. Cambridge, UK; New York, NY: Cambridge University Press. ISBN 0-521-80150-8. OCLC 44811929.{{cite book}}: CS1 maint: multiple names: authors list (link)
• Batten-Hill, David (2011). This Son of York. Kendal, England: David Batten-Hill. ISBN 978-1-78176-094-9. OCLC http://www.tsoy.co.uk. {{cite book}}: Check |oclc= value (help); External link in |oclc= (help)

Articles

• Bartelloni, Peter J.; Marshall, John D., Jr.; Cavanaugh, Dan C. (1973). "Clinical and serological responses to plague vaccine U.S.P". Military Medicine. 138 (11): 720–722. PMID 4201988. Retrieved 18 January 2011.{{cite journal}}: CS1 maint: multiple names: authors list (link)
• Burmeister, R. W.; Tigertt, W. D.; Overholt, Edwin L. (1962). "Laboratory-acquired pneumonic plague". Annals of Internal Medicine. 56 (5): 789–800. PMID 13874924.
• Cavanaugh, Dan C.; Llewellyn, CH; Marshall Jr, JD; Rust Jr, JH; Williams, JE; Meyer, KF; et al. (1974). "Plague immunization. V. Indirect evidence for the efficacy of plague vaccine". Journal of Infectious Diseases. 129 (supplement): S37–S40. doi:10.1093/infdis/129.Supplement_1.S37. PMID 4596518. {{cite journal}}: Explicit use of et al. in: |last2= (help)
• Kool, J. L. (2005). "Risk of Person-to-Person Transmission of Pneumonic Plague". Clinical Infectious Diseases. 40 (8): 1166–1172. doi:10.1086/428617. PMID 15791518.