First Cholera Pandemic (1817-1824): From Bengal to the World

The first cholera pandemic was the first time cholera spread far beyond its homeland in the Ganges delta of Bengal. Beginning in 1817, it travelled along rivers, trade routes and military campaigns across India and on to Southeast Asia, China, Japan and the Middle East, reaching the edge of Europe by 1823. It marked the start of a century of cholera pandemics that would transform medicine and public health.

Cholera before 1817

Cholera is an acute intestinal infection caused by the bacterium Vibrio cholerae. It spreads mainly through drinking water or food contaminated with human faeces. Victims suffer sudden, massive diarrhoea and vomiting, and without rapid replacement of fluids and salts they can die of dehydration within hours. In the 19th century, roughly half of those who developed severe symptoms died.

The disease had long been present in the Ganges delta, where warm brackish waters suit the bacterium. Earlier outbreaks in India were recorded by European observers, but they had remained regional. In 1817 something changed, and cholera broke out of Bengal on a scale never seen before.

Why this happened is still debated. Some historians point to unusual weather after the eruption of Mount Tambora in 1815, which disrupted the monsoon in 1816 and 1817. Others stress the growth of trade, shipping and military movement under British rule, which carried people and goods across India faster than before. A more aggressive strain of the bacterium may also have played a part.

European doctors soon began calling the new disease “Asiatic cholera” or “spasmodic cholera”. The names distinguished it from “cholera morbus”, an older European term for ordinary summer diarrhoea that was rarely fatal. The distinction mattered, because many physicians at first assumed the Indian reports described a familiar illness and underestimated the danger.

The outbreak in Bengal

In August 1817 officials reported a deadly epidemic at Jessore, a district town north-east of Calcutta (now Jashore in Bangladesh). Within weeks the disease reached Calcutta, the capital of British India, and spread along the Ganges and its tributaries.

In November 1817 cholera struck the Grand Army of the Governor-General, the Marquess of Hastings, which was campaigning in central India against the Pindari raiders and the Maratha powers. In about two weeks several thousand soldiers and camp followers died. The march routes of armies and their enormous trains of followers helped carry the disease across the subcontinent.

By 1818 and 1819 cholera had reached most of India, including Bombay and Madras. The Bengal Medical Board commissioned a detailed report, compiled by the surgeon James Jameson and published in 1820, which tracked the spread of the epidemic district by district. It was one of the first systematic studies of a cholera epidemic, although it could not identify the cause.

Spreading across Asia

From India the disease travelled by sea. It reached Ceylon (Sri Lanka) and, carried by shipping, the island of Mauritius in the Indian Ocean in 1819. It spread east to Burma and Siam, where in 1820 tens of thousands of people reportedly died in and around Bangkok, and south to the Malay Peninsula and Java, where deaths in 1821 may have reached around 100,000.

In the Philippines, cholera struck Manila in 1820. Rumours that foreigners had poisoned the water led to riots in October 1820 in which a number of European and Chinese residents were killed. The disease reached China through the port of Canton (Guangzhou) in 1820 and spread inland over the next two years. In 1822 it arrived in Japan, its first recorded appearance there. It entered through western Japan and spread as far as Osaka, but did not reach the shogun’s capital, Edo. Japanese writers later remembered it as a terrifying new illness that could kill a person within a day.

Westward, British military and naval expeditions to the Persian Gulf, together with merchant shipping and pilgrimage routes, carried cholera to Muscat in 1821 and then to Basra and Baghdad, where thousands died. It moved through Persia to Shiraz and Tabriz, and along caravan routes into Ottoman Syria and Anatolia. In 1823 it reached Astrakhan, at the mouth of the Volga on the Caspian Sea, inside the Russian Empire. Arab and Indian trading vessels also carried the disease along the shores of the Arabian Sea, and it reached the East African coast around Zanzibar in the early 1820s.

How people understood it

Doctors at the time had no idea that a microbe caused the disease. Most believed in miasma theory, the idea that diseases arose from foul air rising from rotting matter, marshes and filth. Others argued that cholera was contagious, passed from person to person. Debates between “miasmatists” and “contagionists” would continue for decades.

Treatments were often harmful. Physicians bled patients, gave them calomel (a mercury compound) and opium, or applied hot baths and mustard plasters. None addressed the real problem of fluid loss. Communities responded with quarantines, prayers, processions and, in some places, violence against outsiders blamed for the disease.

In Bengal, many Hindus and Muslims turned to religious protection. Devotion grew to local deities associated with cholera, such as Olabibi, whose worship spread in the 19th century. Elsewhere, Muslim communities held special prayers, and in China and Japan people relied on charms, festivals and offerings to drive away the disease. Colonial officials often dismissed these responses, but they reflected real terror at an illness that could kill a healthy adult between morning and night.

Scale and uncertainty

No one counted the dead across the whole of Asia, and colonial and local records were incomplete. Deaths in India alone probably ran into the hundreds of thousands between 1817 and 1824. Some writers give much higher overall totals, but these cannot be confirmed. What is clear is that cholera became a disease of global concern for the first time.

The pandemic also hit the colonial armies hard. British and Indian regiments, crowded into camps and marching with large numbers of followers, suffered repeated outbreaks, and military doctors produced many of the earliest written reports. The losses made the East India Company’s government more willing to fund medical inquiries, although understanding of the disease barely advanced.

Why it stopped

By 1823 and 1824 the pandemic was losing force. The severe winter of 1823 to 1824 is often credited with stopping its advance in Russia and the Middle East. At Astrakhan, Russian authorities also imposed quarantines, and the outbreak there remained limited. In Bengal, however, cholera remained endemic, and within a few years a new wave began. The second cholera pandemic would reach Moscow, Paris, London and New York.

Timeline

• 1817, August: A severe cholera epidemic is reported at Jessore in Bengal.
• 1817, September: Cholera reaches Calcutta.
• 1817, November: The disease kills several thousand in the Marquess of Hastings’ army in central India.
• 1819: Cholera reaches Ceylon and Mauritius.
• 1820: Epidemics strike Siam, Manila and Canton; riots in Manila in October.
• 1821: Cholera reaches Java, Muscat, Basra and Baghdad.
• 1822: The disease appears in Japan.
• 1823, September: Cholera reaches Astrakhan on the Caspian Sea.
• 1824: The pandemic dies down outside Bengal.

Why it matters

The first cholera pandemic turned a regional disease into a world threat. It showed how armies, shipping and trade in an age of empire could carry infection across continents, and it set the pattern for later pandemics that struck Europe and the Americas. The struggle to understand cholera eventually led to the work of John Snow during the Broad Street outbreak of 1854 and to modern sanitation.