49 Fun Facts About Cholera

Cholera is an infection of the small intestine caused by what kind of organism?

A bacterium, Vibrio cholerae, is the culprit: it never invades the gut wall but sits on its lining and releases a toxin that makes the intestine pour out water.

Most swallowed cholera germs never cause illness because they are destroyed by what?

Stomach acid kills most of them, so it takes a huge dose to make a healthy adult ill; people taking acid-suppressing drugs can be infected by far fewer.

Cholera was nicknamed the 'blue death' because of what effect on patients?

Their skin turned bluish-grey from fluid loss as the circulation failed; untreated, cholera can drain the body so fast that it kills within hours.

The death from cholera of General Lamarque in 1832 sparked the Paris uprising at the heart of which novel?

Les Misérables builds to the barricades of June 1832, which went up at the funeral of Lamarque, a popular general; the same epidemic had killed France's prime minister two weeks earlier.

Which now-famous graphic did John Snow make of the 1854 Broad Street cholera outbreak?

A dot map of deaths, each one marked as a small black bar at the victim's address, showed them piling up around a single water pump; it is now a classic of disease mapping.

The doctor investigating the 1854 Soho outbreak persuaded the local council to do what to the Broad Street water pump?

Removing its handle shut the pump the day after he put his evidence to the parish board, yet for years most doctors went on rejecting his explanation of the disease.

Which engineer built London's sewers after its cholera epidemics?

Joseph Bazalgette's sewers were built on a mistaken theory of how cholera spread, yet by carrying waste away from the water supply they ended the city's outbreaks.

Why did no workers at the Broad Street brewery die of cholera in 1854?

They drank beer, not pump water: the men had a daily allowance of malt liquor and the brewery had its own deep well, so its owner was sure they never used the street pump.

The Broad Street well was contaminated by an old cesspit into which water from washing what had drained?

A sick baby's nappies were washed at 40 Broad Street and the water tipped into a cesspit that leaked into the well a few feet away; the child is counted as the outbreak's first case.

Who was Henry Whitehead, who traced the Broad Street outbreak to its first case?

A local curate at St Luke's, Whitehead knew the families of his parish, and that knowledge let him trace the outbreak to the house where its first victim lived, right beside the pump.

Customers of London's Lambeth water company suffered far less cholera in 1854 because it had moved its intake where?

Upriver, above the tide at Thames Ditton, Lambeth drew water beyond the reach of the capital's sewage; a rival still pumping from the tidal Thames lost far more of its customers.

Apart from cholera, the Broad Street investigator is famous for giving which monarch chloroform during childbirth?

Queen Victoria asked for it at Prince Leopold's birth in 1853 and again for Princess Beatrice four years later; he gave just enough to dull the pain without putting her under.

The miasma theory, which most doctors of the 1850s accepted, blamed cholera on what?

Noxious 'bad air' rising from rot and filth was blamed, so reformers fought disease by cleaning streets and airing hospitals, which helped for the wrong reason.

Which Italian anatomist isolated the cholera microbe in 1854, though his work went largely unnoticed?

Filippo Pacini described the germ in 1854, but colleagues wedded to the miasma theory ignored him and the credit went to a rediscovery 30 years later; his name now sits in the species' formal title.

Which German scientist identified Vibrio cholerae under the microscope in 1883 as the cause of the disease?

Robert Koch led a German commission that chased two outbreaks as they raged, in Africa and then in India, and came home having grown the germ in the laboratory.

Vibrio cholerae has what distinctive shape?

Comma-shaped and driven by a single whip-like tail, it bores through the mucus lining the small intestine to reach the gut wall, where it settles and multiplies.

Cholera toxin makes the gut pour out water by raising levels of which messenger molecule inside its cells?

cAMP soars because the toxin jams a G protein switch in the 'on' position; the cell responds by pumping out salts, and water follows them into the gut.

In 1892 Max von Pettenkofer tried to show the cholera germ alone could not cause disease by doing what?

Drinking a live culture of the cholera germ in front of witnesses left the Munich hygienist with nothing worse than mild diarrhoea, which he took as proof that the germ alone was not enough.

The seventh cholera pandemic began in 1961 in which country?

Indonesia's island of Sulawesi was the launch point of the El Tor strain, which leaves most of its carriers without symptoms and so travels unnoticed; as of 2025 the pandemic it started is still running.

The first cholera pandemic began in 1817 in which region of India?

Bengal's Ganges delta had long harboured the disease; in 1817 it broke out of the delta and, carried by pilgrims, traders and British troops, went on to reach the Mediterranean.

Cholera first reached Canada in 1832 with immigrant ships from Britain, entering through which port city?

Quebec was the gateway: a quarantine station opened just downriver on Grosse Isle in 1832 to inspect every immigrant ship, yet cholera got through and epidemics kept returning into the 1850s.

An 1892 outbreak in which German port city killed more than 8,600 people?

Hamburg still piped its drinking water raw from the Elbe after years of putting off a treatment plant; next-door Altona, which ran its supply through beds of sand first, lost far fewer people.

In Russia's cholera riots of 1830–31, mobs attacked doctors and officials for supposedly doing what?

Poisoning the people was the rumour: quarantines and armed cordons were so hated that crowds believed the authorities were tainting bread and water, and troops had to clear a St Petersburg square.

The word 'cholera' is usually traced to the Greek 'kholē', meaning what?

Bile is the likeliest root; for centuries the word covered any violent stomach upset blamed on it, and only in the 19th century did it settle on the epidemic disease arriving from Asia.

Ships with cholera aboard traditionally flew a quarantine flag of which colour?

Yellow marked a ship in quarantine, with nobody allowed ashore; today the plain yellow signal flag means the opposite, a healthy vessel asking for clearance to enter port.

Oral rehydration solution, the simple drink used to treat cholera, is clean water mixed with salt and what?

Glucose is the trick: the gut absorbs salt and water alongside it even while cholera is draining the body. Hemendra Nath Chatterjee first reported treating patients this way in 1953.

Oral rehydration therapy proved itself on a mass scale in 1971 among refugees from which conflict?

The Bangladesh Liberation War drove millions into Indian camps where cholera broke out; when drip fluid ran out, Dr Dilip Mahalanabis switched to the oral drink and deaths fell sharply.

In 1892 Waldemar Haffkine developed an improved cholera vaccine and first tested it on whom?

Himself: Haffkine injected the vaccine at the Pasteur Institute in Paris in July 1892, at real risk to his life, then took it to India for mass trials.

The 2010 cholera outbreak in Haiti, ten months after the earthquake, was traced to a base of UN peacekeepers from which country?

Nepal's contingent came from a country where cholera circulates, and sewage from its base leaked into a river that thousands of Haitians used for drinking and washing.

Which German philosopher's death in Berlin in 1831 was put down to the cholera epidemic then sweeping the city?

Georg Hegel came back to Berlin that autumn believing the epidemic was over and was dead within weeks, while Schopenhauer fled the city; doctors blamed cholera, though some scholars doubt it.

Which UN Secretary-General said in December 2016 he was 'profoundly sorry' for the organisation's role in Haiti's outbreak?

Ban Ki-moon apologised on the UN's behalf six years after the outbreak began and weeks before leaving office; the UN had earlier fought off victims' lawsuits by claiming legal immunity.

In 2019, 93% of the world's reported cholera cases came from which war-torn country?

Yemen's outbreak began in October 2016 after war wrecked its water, sewage and health systems; the WHO called it the worst cholera outbreak in the world.

A 2008 outbreak blamed partly on government failures happened in which southern African country?

Zimbabwe's water system had collapsed amid hyperinflation: the capital ran out of purification chemicals and its piped supply stopped, and cholera reached every province.

Cholera reappeared in the Americas at the end of the 20th century with a severe outbreak in which country?

Peru's outbreak began in January 1991 and spread across South America over the next three years, the first epidemic the continent had seen in most of a century.

Which Russian composer's death in 1893 has traditionally been attributed to cholera, though some scholars suspect suicide?

Tchaikovsky is said to have drunk unboiled water at a restaurant during an epidemic, waving off his friends' warnings; he died nine days after the premiere of his Sixth Symphony.

Which US president died of cholera in 1849, only months after leaving office?

James K. Polk toured the South after leaving the White House, fell ill as cholera raged in New Orleans, and died at home in Nashville after barely three months of retirement.

Which pioneer of thermodynamics died of cholera in 1832 aged 36?

Sadi Carnot died in obscurity: the one short book he published, at his own expense, was barely noticed in his lifetime, yet it founded the science of heat engines.

Which electrical pioneer spent nine months bedridden with cholera at 17?

Nikola Tesla, by his own account, struck a deal on his sickbed: he might recover if allowed to study engineering, and his father, a priest who had wanted him in the church, agreed.

Who wrote the 1985 novel Love in the Time of Cholera?

Gabriel García Márquez modelled the lovers' thwarted courtship on his own parents, a match his mother's father fought to stop; in Spanish, 'cólera' also means rage.

In Thomas Mann's Death in Venice, how does the cholera-stricken Gustav von Aschenbach die?

In a deck chair on the beach, watching the boy Tadzio at the water's edge: Mann gives him a quiet end that the violent reality of cholera never allows.

In which children's classic do the heroine Mary Lennox's parents die of cholera in India?

The Secret Garden opens with the servants dead or fled and Mary forgotten in the silent bungalow, alone with a small snake until soldiers searching the house find her.

W. Somerset Maugham's 1925 novel The Painted Veil sends an unfaithful wife into a cholera epidemic in which country?

China's remote interior is where her husband, a doctor, volunteers to fight the epidemic; he gives her the choice of coming with him or facing a scandalous divorce over her affair.

The cholera vaccines the WHO stockpiles for outbreaks are given in what way?

Swallowed as a drink, the vaccine does its work in the gut, where cholera strikes; Vaxchora, approved for US travellers in 2016, is a single dose of about three fluid ounces.

The profuse diarrhoea of cholera is classically described as resembling what?

Rice water is the classic comparison because by then the gut is passing a pale, salty fluid with no solid matter left in it, many litres of it a day.

People with which blood group are the most susceptible to cholera?

O is the unlucky group: a hospital study found type O far more common among severe cases, and its authors suggested cholera may explain why O is unusually rare where the disease has circulated longest.

One evolutionary hypothesis holds that carriers of the delta-F508 mutation for which disease resist cholera better?

Cystic fibrosis carriers have one faulty copy of the gene for a channel the cholera toxin exploits; mice with one copy lost half as much fluid, though human studies have not confirmed the benefit.

In French, being forced to pick between two evils is 'choosing between cholera and' what?

Plague is cholera's partner in the saying 'choisir entre la peste et le choléra'; French politicians reach for it at run-off votes, as a deputy beaten in 2022 did in refusing to back either candidate left.

Which very basic filtering method has cut cholera in Bangladeshi villages using untreated water?

Chlorination and boiling remain the cheapest, most effective ways of halting transmission where they are available.

The El Tor cholera strain is named after a quarantine station for Mecca pilgrims in which country?

Egypt's El Tor station on the Sinai coast treated pilgrims returning from Mecca; the vibrio first identified there around 1900 seemed of little account until it went global six decades later.