We carried out a 1:2 matched case-control study in PHD from 5 to 12 June 2022. A questionnaire was administered to cases identified in health facility registers and in the community and controls selected. Case definition included acute watery diarrhoea and having epidemiological link with a confirmed case in the PHD from 1 February to 5 June 2022, or with positive stool sample for Vibrio cholerae. A control was any person without signs of the disease in the same house or neighbour of case. We calculated adjusted odds ratios (ORa) using Epi Info 7 to identify risk factors. 