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{{About|the bacterial disease|the dish|Cholera (food)}}{{pp-vandalism|small=yes}}{{short description|Bacterial infection of the small intestine}}

Cholera is an infection of the small intestine by some strains of the bacterium Vibrio cholerae.WEB, Finkelstein, Richard, Medical microbiology,weblink 14 August 2016, live,weblink 1 September 2017, Symptoms may range from none, to mild, to severe.WEB, Cholera – Vibrio cholerae infection Information for Public Health & Medical Professionals,weblink Centers for Disease Control and Prevention, 17 March 2015, January 6, 2015, live,weblink" title="">weblink 20 March 2015, The classic symptom is large amounts of watery diarrhea that lasts a few days. Vomiting and muscle cramps may also occur. Diarrhea can be so severe that it leads within hours to severe dehydration and electrolyte imbalance. This may result in sunken eyes, cold skin, decreased skin elasticity, and wrinkling of the hands and feet.JOURNAL, Harris, JB, LaRocque, RC, Qadri, F, Ryan, ET, Calderwood, SB, Cholera., Lancet, 30 June 2012, 379, 9835, 2466–76, 22748592, 10.1016/s0140-6736(12)60436-x, 3761070, Dehydration can cause the skin to turn bluish.BOOK, Bailey, Diane, Cholera, 2011, Rosen Pub., New York, 978-1-4358-9437-2, 7, 1st,weblink live,weblink 2016-12-03, Symptoms start two hours to five days after exposure.Cholera is caused by a number of types of Vibrio cholerae, with some types producing more severe disease than others. It is spread mostly by unsafe water and unsafe food that has been contaminated with human feces containing the bacteria. Undercooked seafood is a common source.WEB, Sources of Infection & Risk Factors,weblink Centers for Disease Control and Prevention, 17 March 2015, November 7, 2014, live,weblink" title="">weblink 12 March 2015, Humans are the only animal affected. Risk factors for the disease include poor sanitation, not enough clean drinking water, and poverty. There are concerns that rising sea levels will increase rates of disease. Cholera can be diagnosed by a stool test.JOURNAL, Cholera vaccines: WHO position paper, Wkly. Epidemiol. Rec., March 26, 2010, 85, 13, 117–128, 20349546,weblink live,weblink" title="">weblink April 13, 2015, A rapid dipstick test is available but is not as accurate.WEB, Diagnosis and Detection,weblink Centers for Disease Control and Prevention, 17 March 2015, February 10, 2015, live,weblink" title="">weblink 15 March 2015, Prevention methods against cholera include improved sanitation and access to clean water. Cholera vaccines that are given by mouth provide reasonable protection for about six months. They have the added benefit of protecting against another type of diarrhea caused by E. coli. The primary treatment is oral rehydration therapy—the replacement of fluids with slightly sweet and salty solutions. Rice-based solutions are preferred. Zinc supplementation is useful in children.WEB, Cholera – Vibrio cholerae infection Treatment,weblink Centers for Disease Control and Prevention, 17 March 2015, November 7, 2014, live,weblink" title="">weblink 11 March 2015, In severe cases, intravenous fluids, such as Ringer's lactate, may be required, and antibiotics may be beneficial. Testing to see which antibiotic the cholera is susceptible to can help guide the choice.Cholera affects an estimated 3–5 million people worldwide and causes 28,800–130,000 deaths a year.JOURNAL, GBD 2015 Mortality and Causes of Death, Collaborators., Global, regional, and national life expectancy, all-cause mortality, and cause-specific mortality for 249 causes of death, 1980–2015: a systematic analysis for the Global Burden of Disease Study 2015., Lancet, 8 October 2016, 388, 10053, 1459–1544, 27733281, 10.1016/s0140-6736(16)31012-1, 5388903, Although it is classified as a pandemic {{as of|2010|lc=y}}, it is rare in the developed world. Children are mostly affected.WEB, Cholera – Vibrio cholerae infection,weblink Centers for Disease Control and Prevention, 17 March 2015, October 27, 2014, live,weblink" title="">weblink 17 March 2015, Cholera occurs as both outbreaks and chronically in certain areas. Areas with an ongoing risk of disease include Africa and Southeast Asia. The risk of death among those affected is usually less than 5% but may be as high as 50%. No access to treatment results in a higher death rate. Descriptions of cholera are found as early as the 5th century BC in Sanskrit. The study of cholera in England by John Snow between 1849 and 1854 led to significant advances in the field of epidemiology.BOOK, Timmreck, Thomas C., An introduction to epidemiology, 2002, Jones and Bartlett Publishers, Sudbury, MA, 978-0-7637-0060-7, 77, 3.,weblink live,weblink 2016-12-03, Seven large outbreaks have occurred over the last 200 years with millions of deaths.NEWS, Cholera's seven pandemics,weblink 15 July 2018, CBC, 9 May 2008, File:Wikipedia-VideoWiki-Cholera.webm|thumb|thumbtime=1:19|upright=1.3|Video summary (script)]]

Signs and symptoms

(File:Cholera feces.jpg|thumb|Typical cholera diarrhea that looks like "rice water".)The primary symptoms of cholera are profuse diarrhea and vomiting of clear fluid.JOURNAL, January 2004, Cholera, Lancet, 363, 9404, 223–33, 10.1016/S0140-6736(03)15328-7, 14738797, Sack DA, Sack RB, Nair GB, Siddique AK, These symptoms usually start suddenly, half a day to five days after ingestion of the bacteria.JOURNAL, Azman AS, Rudolph KE, Cummings DA, Lessler J, The incubation period of cholera: A systematic review, J. Infect., 66, 5, 432–438, November 2012, 23201968, 3677557, 10.1016/j.jinf.2012.11.013, The diarrhea is frequently described as "rice water" in nature and may have a fishy odor. An untreated person with cholera may produce {{convert|10|to|20|litre|USgal|sigfig=1}} of diarrhea a day. Severe cholera, without treatment, kills about half of affected individuals. If the severe diarrhea is not treated, it can result in life-threatening dehydration and electrolyte imbalances. Estimates of the ratio of asymptomatic to symptomatic infections have ranged from 3 to 100.JOURNAL, King AA, Ionides EL, Pascual M, Bouma MJ, Inapparent infections and cholera dynamics, Nature, 454, 7206, 877–80, August 2008, 18704085, 10.1038/nature07084, 2008Natur.454..877K,weblink 2027.42/62519, Cholera has been nicknamed the "blue death"JOURNAL, Greenough, William B., The blue death Disease, disaster, and the water we drink, 2171164, The Journal of Clinical Investigation, 118, 1, 4, 10.1172/JCI34394, 2 January 2008, because a person's skin may turn bluish-gray from extreme loss of fluids.BOOK, McElroy, Ann, Townsend, Patricia K., Medical Anthropology in Ecological Perspective, Boulder, CO, Westview, 2009, 375, 978-0-8133-4384-6, Fever is rare and should raise suspicion for secondary infection. Patients can be lethargic, and might have sunken eyes, dry mouth, cold clammy skin, or wrinkled hands and feet. Kussmaul breathing, a deep and labored breathing pattern, can occur because of acidosis from stool bicarbonate losses and lactic acidosis associated with poor perfusion. Blood pressure drops due to dehydration, peripheral pulse is rapid and thready, and urine output decreases with time. Muscle cramping and weakness, altered consciousness, seizures, or even coma due to electrolyte imbalances are common, especially in children.


File:Cholera bacteria SEM.jpg|thumb|Scanning electron microscopeScanning electron microscopeFile:Vibrio cholerae.jpg|thumb|Vibrio choleraeVibrio cholerae


Cholera has been found in two animal populations: shellfish and plankton.Transmission is usually through the fecal-oral route of contaminated food or water caused by poor sanitation. Most cholera cases in developed countries are a result of transmission by food, while in the developing world it is more often water. Food transmission can occur when people harvest seafood such as oysters in waters infected with sewage, as Vibrio cholerae accumulates in planktonic crustaceans and the oysters eat the zooplankton.AV MEDIA,weblink Oceans, Climate, and Health: Cholera as a Model of Infectious Diseases in a Changing Environment, James A Baker III Institute for Public Policy, Rita Colwell, 2013-10-23, Rice University, live,weblink" title="">weblink 2013-10-26, People infected with cholera often have diarrhea, and disease transmission may occur if this highly liquid stool, colloquially referred to as "rice-water", contaminates water used by others.BOOK, Sherris Medical Microbiology, McGraw Hill, 2004, 978-0-8385-8529-0, 4th, 376–7, Ryan KJ, Ray CG, A single diarrheal event can cause a one-million fold increase in numbers of V. cholerae in the environment.WEB,weblink Cholera Biology and Genetics {{!, NIH: National Institute of Allergy and Infectious Diseases||language=en|access-date=2017-12-05}} The source of the contamination is typically other cholera sufferers when their untreated diarrheal discharge is allowed to get into waterways, groundwater or drinking water supplies. Drinking any contaminated water and eating any foods washed in the water, as well as shellfish living in the affected waterway, can cause a person to contract an infection. Cholera is rarely spread directly from person to person.{{medical citation needed|date=July 2015}}V. cholerae also exists outside the human body in natural water sources, either by itself or through interacting with phytoplankton, zooplankton, or biotic and abiotic detritus.JOURNAL, Nelson, EJ, Harris, JB, Morris, JG, Calderwood, SB, Camilli, A, Cholera transmission: the host, pathogen and bacteriophage dynamic, Nat Rev Microbiol, 7 October 2009, 7, 10, 693–702, 10.1038/nrmicro2204, 19756008, 3842031, Drinking such water can also result in the disease, even without prior contamination through fecal matter. Selective pressures exist however in the aquatic environment that may reduce the virulence of V. cholerae. Specifically, animal models indicate that the transcriptional profile of the pathogen changes as it prepares to enter an aquatic environment. This transcriptional change results in a loss of ability of V. cholerae to be cultured on standard media, a phenotype referred to as 'viable but non-culturable' (VBNC) or more conservatively 'active but non-culturable' (ABNC). One study indicates that the culturability of V. cholerae drops 90% within 24 hours of entering the water, and furthermore that this loss in culturability is associated with a loss in virulence.JOURNAL, Nelson, EJ, Chowdhury, A, Flynn, J, Schild, Stefan, Bourassa, L, Shao, Yue, LaRocque, RC, Calderwood, SB, Qadri, F, Camilli, A, Transmission of Vibrio cholerae Is Antagonized by Lytic Phage and Entry into the Aquatic Environment, PLoS Pathog, 24 October 2008, 4, 10, e1000187, 10.1371/journal.ppat.1000187, 18949027, 2563029, Both toxic and non-toxic strains exist. Non-toxic strains can acquire toxicity through a temperate bacteriophage.JOURNAL, 1997, Cholera phage discovery,weblink Arch. Dis. Child., 76, 3, 274, 10.1136/adc.76.3.274, harv, Archivist, live,weblink" title="">weblink 2008-12-16, 1717096,


About 100{{nbsp}}million bacteria must typically be ingested to cause cholera in a normal healthy adult. This dose, however, is less in those with lowered gastric acidity (for instance those using proton pump inhibitors). Children are also more susceptible, with two- to four-year-olds having the highest rates of infection. Individuals' susceptibility to cholera is also affected by their blood type, with those with type O blood being the most susceptible. Persons with lowered immunity, such as persons with AIDS or malnourished children, are more likely to experience a severe case if they become infected.Prevention and control of cholera outbreaks: WHO policy and recommendations {{webarchive|url= |date=2011-11-22 }}, World Health Organization, Regional Office for the Eastern Mediterranean, undated but citing sources from '07, '04, '03, '04, and '05. Any individual, even a healthy adult in middle age, can experience a severe case, and each person's case should be measured by the loss of fluids, preferably in consultation with a professional health care provider.{{mcn|date=December 2013}}The cystic fibrosis genetic mutation known as delta-F508 in humans has been said to maintain a selective heterozygous advantage: heterozygous carriers of the mutation (who are thus not affected by cystic fibrosis) are more resistant to V. cholerae infections.JOURNAL, 1996, Genetic and geographical variability in cystic fibrosis: evolutionary considerations, Ciba Found. Symp., 197, 97–114; discussion 114–8, 8827370, Bertranpetit J, Calafell F, In this model, the genetic deficiency in the cystic fibrosis transmembrane conductance regulator channel proteins interferes with bacteria binding to the intestinal epithelium, thus reducing the effects of an infection.


File:Cholera role of biofilm in intestinal colonization.jpg|thumb|upright=1.4|The role of biofilmbiofilmWhen consumed, most bacteria do not survive the acidic conditions of the human stomach. The few surviving bacteria conserve their energy and stored nutrients during the passage through the stomach by shutting down protein production. When the surviving bacteria exit the stomach and reach the small intestine, they must propel themselves through the thick mucus that lines the small intestine to reach the intestinal walls where they can attach and thrive.JOURNAL, Almagro-Moreno, S, Pruss, K, Taylor, RK, Intestinal Colonization Dynamics of Vibrio cholerae., PLOS Pathog., May 2015, 11, 5, e1004787, 25996593, 10.1371/journal.ppat.1004787, 4440752, Once the cholera bacteria reach the intestinal wall, they no longer need the flagella to move. The bacteria stop producing the protein flagellin to conserve energy and nutrients by changing the mix of proteins which they express in response to the changed chemical surroundings. On reaching the intestinal wall, V. cholerae start producing the toxic proteins that give the infected person a watery diarrhea. This carries the multiplying new generations of V. cholerae bacteria out into the drinking water of the next host if proper sanitation measures are not in place.{{mcn|date=December 2013}}The cholera toxin (CTX or CT) is an oligomeric complex made up of six protein subunits: a single copy of the A subunit (part A), and five copies of the B subunit (part B), connected by a disulfide bond. The five B subunits form a five-membered ring that binds to GM1 gangliosides on the surface of the intestinal epithelium cells. The A1 portion of the A subunit is an enzyme that ADP-ribosylates G proteins, while the A2 chain fits into the central pore of the B subunit ring. Upon binding, the complex is taken into the cell via receptor-mediated endocytosis. Once inside the cell, the disulfide bond is reduced, and the A1 subunit is freed to bind with a human partner protein called ADP-ribosylation factor 6 (Arf6).JOURNAL, O'Neal CJ, Jobling MG, Holmes RK, Hol WG, Structural basis for the activation of cholera toxin by human ARF6-GTP, Science, 309, 5737, 1093–6, 2005, 16099990, 10.1126/science.1113398, harv, 2005Sci...309.1093O, Binding exposes its active site, allowing it to permanently ribosylate the Gs alpha subunit of the heterotrimeric G protein. This results in constitutive cAMP production, which in turn leads to the secretion of water, sodium, potassium, and bicarbonate into the lumen of the small intestine and rapid dehydration. The gene encoding the cholera toxin was introduced into V. cholerae by horizontal gene transfer. Virulent strains of V. cholerae carry a variant of a temperate bacteriophage called CTXφ.Microbiologists have studied the genetic mechanisms by which the V. cholerae bacteria turn off the production of some proteins and turn on the production of other proteins as they respond to the series of chemical environments they encounter, passing through the stomach, through the mucous layer of the small intestine, and on to the intestinal wall.JOURNAL, DiRita VJ, Parsot C, Jander G, Mekalanos JJ, Regulatory cascade controls virulence in Vibrio cholerae, Proc. Natl. Acad. Sci. U.S.A., 88, 12, 5403–7, June 1991, 2052618, 51881, 10.1073/pnas.88.12.5403, harv, 1991PNAS...88.5403D, Of particular interest have been the genetic mechanisms by which cholera bacteria turn on the protein production of the toxins that interact with host cell mechanisms to pump chloride ions into the small intestine, creating an ionic pressure which prevents sodium ions from entering the cell. The chloride and sodium ions create a salt-water environment in the small intestines, which through osmosis can pull up to six liters of water per day through the intestinal cells, creating the massive amounts of diarrhea. The host can become rapidly dehydrated unless an appropriate mixture of dilute salt water and sugar is taken to replace the blood's water and salts lost in the diarrhea.{{mcn|date=December 2013}}By inserting separate, successive sections of V. cholerae DNA into the DNA of other bacteria, such as E. coli that would not naturally produce the protein toxins, researchers have investigated the mechanisms by which V. cholerae responds to the changing chemical environments of the stomach, mucous layers, and intestinal wall. Researchers have discovered a complex cascade of regulatory proteins controls expression of V. cholerae virulence determinants.{{medical citation needed|date=July 2015}} In responding to the chemical environment at the intestinal wall, the V. cholerae bacteria produce the TcpP/TcpH proteins, which, together with the ToxR/ToxS proteins, activate the expression of the ToxT regulatory protein. ToxT then directly activates expression of virulence genes that produce the toxins, causing diarrhea in the infected person and allowing the bacteria to colonize the intestine. Current{{when|date=August 2017}} research aims at discovering "the signal that makes the cholera bacteria stop swimming and start to colonize (that is, adhere to the cells of) the small intestine."

Genetic structure

Amplified fragment length polymorphism fingerprinting of the pandemic isolates of V. cholerae has revealed variation in the genetic structure. Two clusters have been identified: Cluster I and Cluster II. For the most part, Cluster I consists of strains from the 1960s and 1970s, while Cluster II largely contains strains from the 1980s and 1990s, based on the change in the clone structure. This grouping of strains is best seen in the strains from the African continent.{{Unreliable medical source|date=December 2013}} JOURNAL, Lan R, Reeves PR, Pandemic Spread of Cholera: Genetic Diversity and Relationships within the Seventh Pandemic Clone of Vibrio cholerae Determined by Amplified Fragment Length Polymorphism, J. Clin. Microbiol., 40, 1, 172–181, January 2002, 11773113, 120103, 10.1128/JCM.40.1.172-181.2002, harv, 0095-1137,

Antibiotic resistance

In many areas of the world, antibiotic resistance is increasing within cholera bacteria. In Bangladesh, for example, most cases are resistant to tetracycline, trimethoprim-sulfamethoxazole, and erythromycin. Rapid diagnostic assay methods are available for the identification of multi-drug resistant cases.BOOK, Real-Time PCR in microbiology: From diagnosis to characterization, Caister Academic Press, 2007, 978-1-904455-18-9, Mackay IM, New generation antimicrobials have been discovered which are effective against cholera bacteria in in vitro studies.BOOK, Vibrio cholerae: Genomics and molecular biology, Caister Academic Press, 2008, 978-1-904455-33-2, Antibiotic resistance in Vibrio cholerae, Ramamurthy T,


A rapid dipstick test is available to determine the presence of V. cholerae. In those samples that test positive, further testing should be done to determine antibiotic resistance. In epidemic situations, a clinical diagnosis may be made by taking a patient history and doing a brief examination. Treatment is usually started without or before confirmation by laboratory analysis.Stool and swab samples collected in the acute stage of the disease, before antibiotics have been administered, are the most useful specimens for laboratory diagnosis. If an epidemic of cholera is suspected, the most common causative agent is V. cholerae O1. If V. cholerae serogroup O1 is not isolated, the laboratory should test for V. cholerae O139. However, if neither of these organisms is isolated, it is necessary to send stool specimens to a reference laboratory.Infection with V. cholerae O139 should be reported and handled in the same manner as that caused by V. cholerae O1. The associated diarrheal illness should be referred to as cholera and must be reported in the United States.WEB,weblink Laboratory Methods for the Diagnosis of Epidemic Dysentery and Cholera, 1999, Centers for Disease Control and Prevention, 2017-06-30, live,weblink 2017-06-23,


(File:It doesn't hurt, but it tickles. A U.S. Navy hospital corpsman, member of a USAID military health team, inoculates a flo - NARA - 541855.jpg|thumb|upright=1.3|Preventive inoculation against cholera in 1966.)The World Health Organization (WHO) recommends focusing on prevention, preparedness, and response to combat the spread of cholera."Cholera Fact Sheet", World Health Organization. {{webarchive|url= |date=2012-05-05 }}. Retrieved November 5, 2013. They also stress the importance of an effective surveillance system. Governments can play a role in all of these areas.Although cholera may be life-threatening, prevention of the disease is normally straightforward if proper sanitation practices are followed. In developed countries, due to nearly universal advanced water treatment and sanitation practices present there, cholera is rare. For example, the last major outbreak of cholera in the United States occurred in 1910–1911.NEWS, Cholera Kills Boy. All Other Suspected Cases Now in Quarantine and Show No Alarming Symptoms.,weblink The sixth death from cholera since the arrival in this port from Naples of the steamship SMS Moltke (1877), Moltke, thirteen days ago, occurred yesterday at Swineburne Island. The victim was Francesco Farando, 14 years old., The New York Times, July 18, 1911, 2008-07-28, {{dead link|date=June 2018|bot=medic}}{{cbignore|bot=medic}}NEWS, More Cholera in Port,weblink A case of cholera developed today in the steerage of the Hamburg-American liner SMS Moltke (1877), Moltke, which has been detained at quarantine as a possible cholera carrier since Monday last. Dr. A.H. Doty, health officer of the port, reported the case tonight with the additional information that another cholera patient from the Moltke is under treatment at Swinburne Island., Washington Post, October 10, 1910, 2008-12-11, live,weblink" title="">weblink December 16, 2008, Cholera is mainly a risk in developing countries.Effective sanitation practices, if instituted and adhered to in time, are usually sufficient to stop an epidemic. There are several points along the cholera transmission path at which its spread may be halted:{{citation needed|date=September 2017}}
  • Sterilization: Proper disposal and treatment of all materials that may have come into contact with cholera victims' feces (e.g., clothing, bedding, etc.) are essential. These should be sanitized by washing in hot water, using chlorine bleach if possible. Hands that touch cholera patients or their clothing, bedding, etc., should be thoroughly cleaned and disinfected with chlorinated water or other effective antimicrobial agents.
  • Sewage and fecal sludge management: In cholera-affected areas, sewage and fecal sludge need to be treated and managed carefully in order to stop the spread of this disease via human excreta. Provision of sanitation and hygiene is an important preventative measure. Open defecation, release of untreated sewage, or dumping of fecal sludge from pit latrines or septic tanks into the environment need to be prevented.BOOK,weblink Urban Water Security: Managing Risks: UNESCO-IHP, Cisneros, Blanca Jimenez, Rose, Joan B., 2009-03-24, CRC Press, 978-0-203-88162-0, en, In many cholera affected zones, there is a low degree of sewage treatment.BOOK,weblink Cholera and the Ecology of Vibrio cholerae, Drasar, B. S., Forrest, B. D., 2012-12-06, Springer Science & Business Media, 978-94-009-1515-2, 24, BOOK,weblink A Companion to the Anthropology of Environmental Health, Singer, Merrill, 2016-05-31, John Wiley & Sons, 978-1-118-78699-4, 219, Therefore, the implementation of dry toilets that do not contribute to water pollution, as they do not flush with water, may be an interesting alternative to flush toilets.WEB,weblink Starting a poop to compost movement {{!, Global Ideas {{!}} DW {{!}} 09.06.2015|last=(|first=Deutsche Welle|website=DW.COM|language=en|access-date=2017-10-01}}
  • Sources: Warnings about possible cholera contamination should be posted around contaminated water sources with directions on how to decontaminate the water (boiling, chlorination etc.) for possible use.
  • Water purification: All water used for drinking, washing, or cooking should be sterilized by either boiling, chlorination, ozone water treatment, ultraviolet light sterilization (e.g., by solar water disinfection), or antimicrobial filtration in any area where cholera may be present. Chlorination and boiling are often the least expensive and most effective means of halting transmission. Cloth filters or sari filtration, though very basic, have significantly reduced the occurrence of cholera when used in poor villages in Bangladesh that rely on untreated surface water. Better antimicrobial filters, like those present in advanced individual water treatment hiking kits, are most effective. Public health education and adherence to appropriate sanitation practices are of primary importance to help prevent and control transmission of cholera and other diseases.
Handwashing with soap or ash after using a toilet and before handling food or eating is also recommended for cholera prevention by WHO Africa.WEB, Cholera and food safety,weblink World Health Organization, 2017-08-20, live,weblink" title="">weblink 2017-08-21, File:Unsafe disposal of faecal sludge or sewage in Haiti (6458176073).jpg|Dumping of sewage or fecal sludge from a UN camp into a lake in the surroundings of Port-au-Prince is thought to have contributed to the spread of cholera after the Haiti earthquake in 2010, killing thousands.File:A SOIL EkoLakay toilet customer. (15921409131).jpg|Example of a urine-diverting dry toilet in a cholera-affected area in Haiti. This type of toilet stops transmission of disease via the fecal-oral route due to water pollution.File:Cholera hospital in Dhaka.jpg|Cholera hospital in Dhaka, showing typical "cholera beds".


(File:Using Precipitation Data to Assess Risk of Cholera Outbreaks.webm|thumb|upright=1.3|A modelling approach using satellite data can enhance our ability to develop cholera risk maps in several regions of the globe.)Surveillance and prompt reporting allow for containing cholera epidemics rapidly. Cholera exists as a seasonal disease in many endemic countries, occurring annually mostly during rainy seasons. Surveillance systems can provide early alerts to outbreaks, therefore leading to coordinated response and assist in preparation of preparedness plans. Efficient surveillance systems can also improve the risk assessment for potential cholera outbreaks. Understanding the seasonality and location of outbreaks provides guidance for improving cholera control activities for the most vulnerable.WEB,weblink Cholera: prevention and control, WHO, Health topics, 2008, 2008-12-08, live,weblink" title="">weblink 2008-12-14, For prevention to be effective, it is important that cases be reported to national health authorities.


(File:Euvichol-plus.jpg|thumb|Euvichol-plus oral vaccine for cholera)A number of safe and effective oral vaccines for cholera are available.JOURNAL, Sinclair D, Abba K, Zaman K, Qadri F, Graves PM, Oral vaccines for preventing cholera, Cochrane Database Syst. Rev., 3, CD008603, 2011, 21412922, 6532691, 10.1002/14651858.CD008603.pub2, Sinclair D, The World Health Organization (WHO) has three prequalified oral cholera vaccines (OCVs): Dukoral, Sanchol, and Euvichol. Dukoral, an orally administered, inactivated whole cell vaccine, has an overall efficacy of about 52% during the first year after being given and 62% in the second year, with minimal side effects. It is available in over 60 countries. However, it is not currently{{when|date=August 2017}} recommended by the Centers for Disease Control and Prevention (CDC) for most people traveling from the United States to endemic countries.WEB, Is a vaccine available to prevent cholera?, CDC disease info: Cholera,weblink 2010-10-22, 2010-10-24, live,weblink" title="">weblink 2010-10-26, The vaccine that the US Food and Drug Administration (FDA) recommends, Vaxchora, is an oral attenuated live vaccine, that is effective as a single dose.FDA Product Approval – Immunization Action Coalition {{webarchive|url= |date=2017-04-15 }}One injectable vaccine was found to be effective for two to three years. The protective efficacy was 28% lower in children less than five years old.JOURNAL, Graves PM, Deeks JJ, Demicheli V, Jefferson T, Vaccines for preventing cholera: killed whole cell or other subunit vaccines (injected), Cochrane Database Syst. Rev., 8, CD000974, 2010, 20687062, 6532721, 10.1002/14651858.CD000974.pub2, Graves PM, However, {{as of|2010|lc=y}}, it has limited availability. Work is under way to investigate the role of mass vaccination.WEB,weblink Cholera vaccines, WHO, Health topics, 2008, 2010-02-01, live,weblink" title="">weblink 2010-02-16, The WHO recommends immunization of high-risk groups, such as children and people with HIV, in countries where this disease is endemic. If people are immunized broadly, herd immunity results, with a decrease in the amount of contamination in the environment.

Sari filtration

An effective and relatively cheap method to prevent the transmission of cholera is the use of a folded sari (a long cloth garment) to filter drinking water.BOOK, Ramamurthy T, Epidemiological and Molecular Aspects on Cholera, 2010, Springer, 978-1-60327-265-0, 330,weblink live,weblink 2015-11-07, In Bangladesh this practice was found to decrease rates of cholera by nearly half.BOOK, Merrill RM, Introduction to epidemiology., 2010, Jones and Bartlett Publishers, Sudbury, MA, 978-0-7637-6622-1, 43,weblink 5th, live,weblink 2015-11-06, It involves folding a sari four to eight times. Between uses the cloth should be rinsed in clean water and dried in the sun to kill any bacteria on it.BOOK, Starr C, Biology: Today and Tomorrow with Physiology, 2007, Cengage Learning, 978-1-111-79701-0, 563,weblink 2, live,weblink 2015-11-07, A nylon cloth appears to work as well but is not as affordable.


File:Cholera rehydration nurses.jpg|thumb|upright=1.3|Cholera patient being treated by oral rehydration therapyoral rehydration therapyContinued eating speeds the recovery of normal intestinal function. The WHO recommends this generally for cases of diarrhea no matter what the underlying cause. A CDC training manual specifically for cholera states: "Continue to breastfeed your baby if the baby has watery diarrhea, even when traveling to get treatment. Adults and older children should continue to eat frequently."WEB,weblink Community Health Worker Training Materials for Cholera Prevention and Control, Centers for Disease Control and Prevention, live,weblink 2017-07-02,


The most common error in caring for patients with cholera is to underestimate the speedand volume of fluids {{webarchive|url= |date=2013-12-03 }} In most cases, cholera can be successfully treated with oral rehydration therapy (ORT), which is highly effective, safe, and simple to administer. Rice-based solutions are preferred to glucose-based ones due to greater efficiency. In severe cases with significant dehydration, intravenous rehydration may be necessary. Ringer's lactate is the preferred solution, often with added potassium.THE TREATMENT OF DIARRHOEA, A manual for physicians and other senior health workers {{webarchive|url= |date=2011-10-19 }}, World Health Organization, 2005. See page 10 (14 in PDF) and esp chapter 5; "MANAGEMENT OF SUSPECTED CHOLERA", pages 16–17 (20–21 in PDF). Large volumes and continued replacement until diarrhea has subsided may be needed. Ten percent of a person's body weight in fluid may need to be given in the first two to four hours. This method was first tried on a mass scale during the Bangladesh Liberation War, and was found to have much success.The Civil War That Killed Cholera {{webarchive|url= |date=2013-12-20 }}, Despite widespread beliefs, fruit juices and commercial fizzy drinks like cola, are not ideal for rehydration of people with serious infections of the intestines, and their excessive sugar content may even harm water uptake.22nd April 2009: Sugary drinks worsen stomach 'bug'. BBC News, Health. citing National Institute for Health and Clinical Excellence. Seen 19th Dec. 2015 WEB,weblink Archived copy, 2015-12-18, live,weblink" title="">weblink 2015-12-22, If commercially produced oral rehydration solutions are too expensive or difficult to obtain, solutions can be made. One such recipe calls for 1 liter of boiled water, 1/2 teaspoon of salt, 6 teaspoons of sugar, and added mashed banana for potassium and to improve taste.WEB,weblink Oral Rehydration Solutions: Made at Home, 2010, 2010-10-29, The Mother and Child Health and Education Trust, live,weblink" title="">weblink 2010-11-24,


As there frequently is initially acidosis, the potassium level may be normal, even though large losses have occurred. As the dehydration is corrected, potassium levels may decrease rapidly, and thus need to be replaced. This may be done by consuming foods high in potassium, like bananas or coconut water.


Antibiotic treatments for one to three days shorten the course of the disease and reduce the severity of the symptoms. Use of antibiotics also reduces fluid requirements.REPORT, November 28, 2011, Cholera Treatment,weblink Centers for Disease Control and Prevention (CDC), live,weblink" title="">weblink March 11, 2015, People will recover without them, however, if sufficient hydration is maintained. The WHO only recommends antibiotics in those with severe dehydration.WEB, First steps for managing an outbreak of acute diarrhea,weblink World Health Organization Global Task Force on Cholera Control, November 23, 2013, live,weblink" title="">weblink August 5, 2014, Doxycycline is typically used first line, although some strains of V. cholerae have shown resistance. Testing for resistance during an outbreak can help determine appropriate future choices. Other antibiotics proven to be effective include cotrimoxazole, erythromycin, tetracycline, chloramphenicol, and furazolidone.WEB,weblink" title="">weblink 6 November 2012,weblink Cholera treatment, Molson Medical Informatics, 2007, 2008-01-03, Fluoroquinolones, such as ciprofloxacin, also may be used, but resistance has been reported.JOURNAL, Krishna BV, Patil AB, Chandrasekhar MR, Fluoroquinolone-resistant Vibrio cholerae isolated during a cholera outbreak in India, Trans. R. Soc. Trop. Med. Hyg., 100, 3, 224–6, March 2006, 16246383, 10.1016/j.trstmh.2005.07.007, harv, Antibiotics improve outcomes in those who are both severely and not severely dehydrated.JOURNAL, Neuberger, A, Bitterman, R, Sinclair, D, Salam, MA, Paul, M, 19 June 2014, Antimicrobial drugs for treating cholera, Cochrane Database Syst. Rev., 6, CD008625, 10.1002/14651858.CD008625.pub2, 24944120, Leibovici-Weissman, Y, 4468928, Azithromycin and tetracycline may work better than doxycycline or ciprofloxacin.

Zinc supplementation

In Bangladesh zinc supplementation reduced the duration and severity of diarrhea in children with cholera when given with antibiotics and rehydration therapy as needed. It reduced the length of disease by eight hours and the amount of diarrhea stool by 10%.REPORT, November 28, 2011, Cholera-Zinc Treatment,weblink Centers for Disease Control and Prevention (CDC), live,weblink" title="">weblink December 3, 2013, Supplementation appears to be also effective in both treating and preventing infectious diarrhea due to other causes among children in the developing world.JOURNAL, Telmesani AM, Oral rehydration salts, zinc supplement and rota virus vaccine in the management of childhood acute diarrhea, J. Fam. Community Med., 17, 2, 79–82, May 2010, 21359029, 3045093, 10.4103/1319-1683.71988,


If people with cholera are treated quickly and properly, the mortality rate is less than 1%; however, with untreated cholera, the mortality rate rises to 50–60%.WEB,weblink Vibrio cholerae and Asiatic Cholera, Todar's Online Textbook of Bacteriology, Todar K, 2010-12-20, live,weblink" title="">weblink 2010-12-28, For certain genetic strains of cholera, such as the one present during the 2010 epidemic in Haiti and the 2004 outbreak in India, death can occur within two hours of becoming ill.EPISODE, NPR News, Morning Edition, Presenter: Richard Knox, NPR, 10 December 2010,


{{See also|Cholera outbreaks and pandemics}}Cholera affects an estimated 3–5 million people worldwide, and causes 58,000–130,000 deaths a year {{as of|2010|lc=y}}.JOURNAL, Lozano R, Naghavi M, Foreman K, Lim S, Shibuya K, Aboyans V, Abraham J, Adair T, Aggarwal R, Ahn SY, Global and regional mortality from 235 causes of death for 20 age groups in 1990 and 2010: a systematic analysis for the Global Burden of Disease Study 2010, Lancet, 380, 9859, 2095–128, December 15, 2012, 23245604, 10.1016/S0140-6736(12)61728-0, etal, 10536/DRO/DU:30050819, This occurs mainly in the developing world.JOURNAL, Reidl J, Klose KE, Vibrio cholerae and cholera: out of the water and into the host, FEMS Microbiol. Rev., 26, 2, 125–39, June 2002, 12069878, 10.1111/j.1574-6976.2002.tb00605.x,weblink In the early 1980s, death rates are believed to have been greater than three million a year. It is difficult to calculate exact numbers of cases, as many go unreported due to concerns that an outbreak may have a negative impact on the tourism of a country.JOURNAL, Sack DA, Sack RB, Chaignat CL, Getting serious about cholera, N. Engl. J. Med., 355, 7, 649–51, August 2006, 16914700, 10.1056/NEJMp068144, Cholera remains{{when|date=August 2017}} both epidemic and endemic in many areas of the world. In October 2016, an outbreak of cholera began in war-ravaged Yemen.WEB,weblink The horrors of Yemen's spiralling cholera crisis, BBC, Johannes Bruwer, 25 June 2017, WHO called it "the worst cholera outbreak in the world".NEWS, Dwyer, Colin, Yemen Now Faces 'The Worst Cholera Outbreak In The World,' U.N. Says,weblink 25 June 2017, National Public Radio, Although much is known about the mechanisms behind the spread of cholera, this has not led to a full understanding of what makes cholera outbreaks happen in some places and not others. Lack of treatment of human feces and lack of treatment of drinking water greatly facilitate its spread, but bodies of water can serve as a reservoir, and seafood shipped long distances can spread the disease. Cholera was not known in the Americas for most of the 20th century, but it reappeared towards the end of that century.JOURNAL, Blake PA, Epidemiology of cholera in the Americas, Gastroenterol. Clin. N. Am., 22, 3, 639–60, 1993, 7691740,


{{Expert needed|Medicine|talk=|reason=timeline inconsistencies, see talk page|date=December 2017}}{{See also|Timeline of cholera|Cholera outbreaks and pandemics}}File:Africa cholera2008b.jpg|thumb|upright=1.3|Map of the 2008–2009 cholera outbreak in sub-Saharan Africasub-Saharan AfricaThe word cholera is from kholera from χολή kholÄ“ "bile". Cholera likely has its origins in the Indian subcontinent as evidenced by its prevalence in the region for centuries.The disease appears in the European literature as early as 1642, from the Dutch physician Jakob de Bondt's description it in his De Medicina Indorum.WEB,weblink All Entries by BONDT, Jacob de, Jacobus Bontius:,, en-us, 2019-07-23, (The "Indorum" of the title refers to the East Indies. He also gave first European descriptions of other diseases.)Early outbreaks in the Indian subcontinent are believed to have been the result of poor living conditions as well as the presence of pools of still water, both of which provide ideal conditions for cholera to thrive. The disease first spread by trade routes (land and sea) to Russia in 1817, later to the rest of Europe, and from Europe to North America and the rest of the world. Seven cholera pandemics have occurred in the past 200 years, with the seventh pandemic originating in Indonesia in 1961."Cholera's seven pandemics {{webarchive|url= |date=2016-03-02 }}". CBC News. October 22, 2010.The first cholera pandemic occurred in the Bengal region of India, near Calcutta starting in 1817 through 1824. The disease dispersed from India to Southeast Asia, the Middle East, Europe, and Eastern Africa.BOOK,weblink Epidemics and Pandemics: Their Impacts on Human History, Hays, JN, ABC-CLIO, 2005, 978-1-85109-658-9, 193, The movement of British Army and Navy ships and personnel is believed to have contributed to the range of the pandemic, since the ships carried people with the disease to the shores of the Indian Ocean, from Africa to Indonesia, and north to China and Japan.{{Citation|last=McNeill|first=William H|title=Plagues and People|page=268}}. The second pandemic lasted from 1826 to 1837 and particularly affected North America and Europe due to the result of advancements in transportation and global trade, and increased human migration, including soldiers.BOOK, Something New Under The Sun: An Environmental History of the Twentieth Century World (The Global Century Series)., McNeil J, The third pandemic erupted in 1846, persisted until 1860, extended to North Africa, and reached South America, for the first time specifically affecting Brazil. The fourth pandemic lasted from 1863 to 1875 spread from India to Naples and Spain. The fifth pandemic was from 1881–1896 and started in India and spread to Europe, Asia, and South America. The sixth pandemic started 1899–1923. These epidemics were less fatal due to a greater understanding of the cholera bacteria. Egypt, the Arabian peninsula, Persia, India, and the Philippines were hit hardest during these epidemics, while other areas, like Germany in 1892 and Naples from 1910–1911, also experienced severe outbreaks. The seventh pandemic originated in 1961 in Indonesia and is marked by the emergence of a new strain, nicknamed El Tor, which still persists ({{as of|2018|lc=y}}WEB,weblink Cholera – Vibrio cholerae infection {{!, Cholera {{!}} CDC|date=2017-05-16||language=en-us|access-date=2018-04-04}}) in developing countries.BOOK, Plagues in World History, Aberth, John, Rowman & Littlefield, 2011, 978-0-7425-5705-5, Lanham, MD, 102, Since it became widespread in the 19th century, cholera has killed tens of millions of people.Kelley Lee (2003) "Health impacts of globalization: towards global governance". Palgrave Macmillan. p.131. {{ISBN|0-333-80254-3}} In Russia alone, between 1847 and 1851, more than one million people perished of the disease.Geoffrey A. Hosking (2001). "Russia and the Russians: a history". Harvard University Press. p. 9. {{ISBN|0-674-00473-6}} It killed 150,000 Americans during the second pandemic.BOOK, Byrne JP, Encyclopedia of Pestilence, Pandemics, and Plagues: A–M,weblink ABC-CLIO, 2008, 99, 978-0-313-34102-1, Between 1900 and 1920, perhaps eight million people died of cholera in India.J. N. Hays (2005). "Epidemics and pandemics: their impacts on human history". p.347. {{ISBN|1-85109-658-2}} Cholera became the first reportable disease in the United States due to the significant effects it had on health. John Snow, in England, was the first to identify the importance of contaminated water as its cause in 1854. Cholera is now no longer considered a pressing health threat in Europe and North America due to filtering and chlorination of water supplies, but still heavily affects populations in developing countries.In the past, vessels flew a yellow quarantine flag if any crew members or passengers were suffering from cholera. No one aboard a vessel flying a yellow flag would be allowed ashore for an extended period, typically 30 to 40 days.JOURNAL, Sehdev PS, The origin of quarantine, Clin. Infect. Dis., 35, 9, 1071–2, November 2002, 12398064, 10.1086/344062, harv, In modern{{when|date=August 2017}} sets of international maritime signal flags, the quarantine flag is yellow and black.Historically many different claimed remedies have existed in folklore. Many of the older remedies were based on the miasma theory. Some believed that abdominal chilling made one more susceptible and flannel and cholera belts were routine in army kits.JOURNAL, 10.1017/S0025727300021281, 13440256, 1034286, The History of the Flannel Binder and Cholera Belt, Med. Hist., 1, 3, 211–25, 2012, Renbourn, E. T., In the 1854–1855 outbreak in Naples homeopathic camphor was used according to {{webarchive|url= |date=2013-05-14 }}, The American Homoeopathic Review Vol. 06 No. 11-12, 1866, pages 401–403 T. J. Ritter's "Mother's Remedies" book lists tomato syrup as a home remedy from northern America. Elecampane was recommended in the United Kingdom according to William Thomas Fernie.WEB, Cholera Infantum, Tomatoes Will Relieve,weblink October 13, 2008, live,weblink" title="">weblink December 24, 2013, Cholera cases are much less frequent in developed countries where governments have helped to establish water sanitation practices and effective medical treatments."Cholera", World Health Organization. {{webarchive|url= |date=2013-10-25 }} The United States, for example, used to{{when|date=August 2017}} have a severe cholera problem similar to those in some developing countries. There were three large cholera outbreaks in the 1800s, which can be attributed to Vibrio cholerae's spread through interior waterways like the Erie Canal and routes along the Eastern Seaboard.JOURNAL, Pyle GF, The Diffusion of Cholera in the United States in the Nineteenth Century, Geogr. Anal., 1, 59–75, 2010, 11614509, 10.1111/j.1538-4632.1969.tb00605.x, The island of Manhattan in New York City touched the Atlantic Ocean, where cholera collected just off the coast. At this time, New York City did not have as effective a sanitation system as it does today,{{when|date=August 2017}} so cholera was able to spread.JOURNAL, Lacey SW, Cholera: calamitous past, ominous future, Clin. Infect. Dis., 20, 5, 1409–19, 1995, 7620035, 10.1093/clinids/20.5.1409, Cholera morbus is a historical term that was used to refer to gastroenteritis rather than specifically cholera.BOOK, Charles E. Rosenberg, The Cholera Years the United States in 1832, 1849, and 1866., 2009, University of Chicago Press, Chicago, 978-0-226-72676-2, 74,weblink live,weblink 2015-11-09, File:Cholera.jpg|Drawing of Death bringing cholera, in Le Petit Journal (1912).File:Pedro II of Brazil and ministers of state.JPG|Emperor Pedro II of Brazil visiting people with cholera in 1855.File:Cholera 395.1.jpg|Hand bill from the New York City Board of Health, 1832—the outdated public health advice demonstrates the lack of understanding of the disease and its actual causative factors.File:ICS Lima.svg|Signal flag "Lima" called the "Yellow Jack" which when flown in harbor means ship is under quarantine.


File:Robert Koch (Deutsche Cholera-Expedition in Ägypten 1884).jpg|thumb|upright=1.3|Robert Koch (third from the right) on a cholera research expedition in EgyptEgyptFile:How to avoid the Cholera 1848.jpg|thumb|upright=1.3|How to avoid the cholera leaflet; AberystwythAberystwythThe bacterium was isolated in 1854 by Italian anatomist Filippo Pacini,See:
  • Fillipo Pacini (1854) "Osservazioni microscopiche e deduzioni patologiche sul cholera asiatico" {{webarchive|url= |date=2015-11-18 }} (Microscopic observations and pathological deductions on Asiatic cholera), Gazzetta Medica Italiana: Toscana, 2nd series, 4 (50) : 397–401; 4 (51) : 405–412.
  • Reprinted (more legibily) as a pamphlet. {{webarchive|url= |date=2015-11-10 }} but its exact nature and his results were not widely known.
Spanish physician Jaume Ferran i Clua developed a cholera inoculation in 1885, the first to immunize humans against a bacterial {{webarchive|url= |date=2015-02-11 }}Russian-Jewish bacteriologist Waldemar Haffkine developed the first cholera vaccine in July {{webarchive|url= |date=2015-09-24 }}One of the major contributions to fighting cholera was made by the physician and pioneer medical scientist John Snow (1813–1858), who in 1854 found a link between cholera and contaminated drinking water.BOOK, Rosenberg, Charles E., The cholera years: the United States in 1832, 1849 and 1866, University of Chicago Press, Chicago, 1987, 978-0-226-72677-9, Dr. Snow proposed a microbial origin for epidemic cholera in 1849. In his major "state of the art" review of 1855, he proposed a substantially complete and correct model for the cause of the disease. In two pioneering epidemiological field studies, he was able to demonstrate human sewage contamination was the most probable disease vector in two major epidemics in London in 1854.Dr John Snow, The mode of communication of cholera {{webarchive|url= |date=2015-11-06 }}, 2nd ed. (London, England: John Churchill, 1855). His model was not immediately accepted, but it was seen to be the more plausible, as medical microbiology developed over the next 30 years or so.Cities in developed nations made massive investment in clean water supply and well-separated sewage treatment infrastructures between the mid-1850s and the 1900s. This eliminated the threat of cholera epidemics from the major developed cities in the world. In 1883, Robert Koch identified V. cholerae with a microscope as the bacillus causing the disease.Aberth, John. Plagues in World History. Lanham, MD: Rowman & Littlefield, 2011, 101.Robert Allan Phillips, working at the US Naval Medical Research Unit Two in Southeast Asia, evaluated the pathophysiology of the disease using modern laboratory chemistry techniques and developed a protocol for rehydration. His research led the Lasker Foundation to award him its prize in 1967.WEB,weblink Albert Lasker Clinical Medical Research Award, Lasker Foundation, June 30, 2017, live,weblink" title="">weblink September 1, 2017, More recently, in 2002, Alam, et al., studied stool samples from patients at the International Centre for Diarrhoeal Disease in Dhaka, Bangladesh. From the various experiments they conducted, the researchers found a correlation between the passage of V. cholerae through the human digestive system and an increased infectivity state. Furthermore, the researchers found the bacterium creates a hyperinfected state where genes that control biosynthesis of amino acids, iron uptake systems, and formation of periplasmic nitrate reductase complexes were induced just before defecation. These induced characteristics allow the cholera vibrios to survive in the "rice water" stools, an environment of limited oxygen and iron, of patients with a cholera infection.JOURNAL, Merrell DS, Butler SM, Qadri F, Dolganov NA, Alam A, Cohen MB, Calderwood SB, Schoolnik GK, Camilli A, Host-induced epidemic spread of the cholera bacterium, Nature, 417, 6889, 642–5, June 2002, 12050664, 2776822, 10.1038/nature00778, harv, 2002Natur.417..642M,

Society and culture

Health policy

In many developing countries, cholera still reaches its victims through contaminated water sources, and countries without proper sanitation techniques have greater incidence of the disease."Cholera vaccines. A brief summary of the March 2010 position paper" (PDF). World Health Organization. Retrieved September 19, 2013. Governments can play a role in this. In 2008, for example, the Zimbabwean cholera outbreak was due partly to the government's role, according to a report from the James Baker Institute. The Haitian government's inability to provide safe drinking water after the 2010 earthquake led to an increase in cholera cases as well.JOURNAL, Walton DA, Ivers LC, Responding to cholera in post-earthquake Haiti, N. Engl. J. Med., 364, 1, 3–5, 2011, 21142690, 10.1056/NEJMp1012997, Similarly, South Africa's cholera outbreak was exacerbated by the government's policy of privatizing water programs. The wealthy elite of the country were able to afford safe water while others had to use water from cholera-infected rivers.JOURNAL, Pauw J, The politics of underdevelopment: metered to death-how a water experiment caused riots and a cholera epidemic, Int. J. Health Serv., 33, 4, 819–30, 2003, 14758861, 10.2190/kf8j-5nqd-xcyu-u8q7, According to Rita R. Colwell of the James Baker Institute, if cholera does begin to spread, government preparedness is crucial. A government's ability to contain the disease before it extends to other areas can prevent a high death toll and the development of an epidemic or even pandemic. Effective disease surveillance can ensure that cholera outbreaks are recognized as soon as possible and dealt with appropriately. Oftentimes, this will allow public health programs to determine and control the cause of the cases, whether it is unsanitary water or seafood that have accumulated a lot of Vibrio cholerae specimens. Having an effective surveillance program contributes to a government's ability to prevent cholera from spreading. In the year 2000 in the state of Kerala in India, the Kottayam district was determined to be "Cholera-affected"; this pronouncement led to task forces that concentrated on educating citizens with 13,670 information sessions about human health.JOURNAL, John TJ, Rajappan K, Arjunan KK, Communicable diseases monitored by disease surveillance in Kottayam district, Kerala state, India, Indian J. Med. Res., 120, 2, 86–93, 2004, 15347857, These task forces promoted the boiling of water to obtain safe water, and provided chlorine and oral rehydration salts. Ultimately, this helped to control the spread of the disease to other areas and minimize deaths. On the other hand, researchers have shown that most of the citizens infected during the 1991 cholera outbreak in Bangladesh lived in rural areas, and were not recognized by the government's surveillance program. This inhibited physicians' abilities to detect cholera cases early.JOURNAL, Siddique AK, Zaman K, Baqui AH, Akram K, Mutsuddy P, Eusof A, Haider K, Islam S, Sack RB, Cholera epidemics in Bangladesh: 1985–1991, J. Diarrhoeal Dis. Res., 10, 2, 79–86, June 1992, 1500643,weblink live,weblink 2015-11-17, According to Colwell, the quality and inclusiveness of a country's health care system affects the control of cholera, as it did in the Zimbabwean cholera outbreak. While sanitation practices are important, when governments respond quickly and have readily available vaccines, the country will have a lower cholera death toll. Affordability of vaccines can be a problem; if the governments do not provide vaccinations, only the wealthy may be able to afford them and there will be a greater toll on the country's poor.JOURNAL, DeRoeck D, Clemens JD, Nyamete A, Mahoney RT, Policymakers' views regarding the introduction of new-generation vaccines against typhoid fever, shigellosis and cholera in Asia, Vaccine, 23, 21, 2762–2774, 2005, 15780724, 10.1016/j.vaccine.2004.11.044, JOURNAL, Choe, Chongwoo, Raschky, Paul A., Media, institutions, and government action: prevention vs. palliation in the time of cholera, Eur. J. Political Econ., 41, 75–93, 10.1016/j.ejpoleco.2015.11.001, January 2016, harv,weblink The speed with which government leaders respond to cholera outbreaks is important.JOURNAL, Pruyt, Eric, Cholera in Zimbabwe,weblink 26 July 2009, Delft University of Technology, dead,weblink" title="">weblink 20 October 2013, Besides contributing to an effective or declining public health care system and water sanitation treatments, government can have indirect effects on cholera control and the effectiveness of a response to cholera.JOURNAL, Kapp C, Zimbabwe's humanitarian crisis worsens, Lancet, 373, 9662, 447, February 2009, 19205080, 10.1016/S0140-6736(09)60151-3,weblink live,weblink" title="">weblink 2009-08-27, A country's government can impact its ability to prevent disease and control its spread. A speedy government response backed by a fully functioning health care system and financial resources can prevent cholera's spread. This limits cholera's ability to cause death, or at the very least a decline in education, as children are kept out of school to minimize the risk of infection.

Notable cases

  • Tchaikovsky's death has traditionally been attributed to cholera, most probably contracted through drinking contaminated water several days earlier.Brown, Man and Music, 430–32; Holden, 371; Warrack, Tchaikovsky, 269–270. Tchaikovsky's mother died of cholera,David Brown, Early Years, 46. and his father became sick with cholera at this time but made a full recovery.Holden, 23. Some scholars, however, including English musicologist and Tchaikovsky authority David Brown and biographer Anthony Holden, have theorized that his death was a suicide.Brown, Man and Music'', 431–35; Holden, 373–400.
  • 2010 Haiti cholera outbreak. Ten months after the 2010 earthquake, an outbreak swept over Haiti, traced to a United Nations base of peacekeepers from Nepal.JOURNAL, Orata, Fabini, Keim, Paul S., Boucher, Yan, The 2010 Cholera Outbreak in Haiti: How Science solved a Controversy, PLOS Pathog., April 2014, 10, 4, This marks the worst cholera outbreak in recent history, as well as the best documented cholera outbreak in modern public health.
  • Sadi Carnot, Physicist, a founder of thermodynamics (d. 1832)Asimov, Isaac (1982), Asimov's Biographical Encyclopedia of Science and Technology (2nd rev. ed.), Doubleday
  • Charles X, King of France (d. 1836)Susan Nagel, Marie Thérèse: Child of Terror, p. 349-350.
  • James K. Polk, eleventh president of the United States (d. 1849)BOOK, Haynes SW, James K. Polk and the Expansionist Impulse, Longman, New York, 191, 978-0-673-99001-3, 1997,weblink
  • Carl von Clausewitz, Prussian soldier and German military theorist (d. 1831)Smith, Rupert, The Utility of Force, Penguin Books, 2006, page 57
  • Elliot Bovill, Chief Justice of the Straits Settlements (1893)The Singapore Free Press and Mercantile Advertiser, 25 March 1893, Page 2 {{webarchive|url= |date=8 August 2014 }}



External links

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