Toxin producing Vibrio cholerae O75 outbreak, United States, March to April 2011.

The Florida Department of Health, Florida, United States, is investigating a Vibrio cholerae O75 outbreak. Ten cases with disease onsets from 23 March to 13 April 2011, presented with gastrointestinal symptoms of diarrhoea, nausea, vomiting, cramps, chills, and/or fever, after consuming raw or lightly cooked oysters harvested from Apalachicola Bay, Florida. Symptoms were milder than those during outbreaks of epidemic (serogroup O1 and O139) Vibrio cholerae; no case required rehydration treatment or hospitalisation.