Is cholera a communicable disease?

Cholera is caused by Vibrio cholerae bacteria living in the intestine. The bacteria leave an infected person in stool and can reach drinking water, food, hands, or household surfaces when sanitation or handwashing is inadequate. Another person can then swallow the bacteria. Spread is therefore closely tied to water, sanitation, food handling, and hygiene.

Direct casual contact is not the usual route by itself. Sharing a room does not automatically transmit cholera, but shared toilets, unwashed hands, unsafe water, or contaminated food can create a route for infection. People with watery diarrhoea may lose fluids quickly, whether or not others around them develop symptoms.

Use safely treated water for drinking, cooking, brushing teeth, and washing food. Wash hands with soap after toilet use and after cleaning anyone with diarrhoea. Clean toilet and bathroom surfaces safely, wash soiled clothing separately, and avoid preparing food for others while ill and until a clinician says it is appropriate.

Anyone with watery diarrhoea should drink oral rehydration solution according to the instructions and seek medical advice promptly. Oral rehydration therapy can replace lost fluid and salts; IV fluid therapy may be needed when dehydration is severe or drinking is not possible. See the pages on diarrhoea, oral rehydration therapy, and IV fluid therapy for practical details.

Get urgent care for very frequent watery diarrhoea, repeated vomiting, faintness, confusion, marked weakness, a dry mouth with little urine, or difficulty drinking. Contact a clinician promptly if someone in your household has cholera or if several people develop similar symptoms after sharing a water source. Mention possible exposure so infection-control advice can start early.

Ask how long to use extra hygiene precautions, whether household contacts need assessment, which water source is safe, and what symptoms mean dehydration is worsening. Ask how to prepare oral rehydration solution correctly and when hospital fluids should be considered.