The survival of Vibrio parahaemolyticus serovar O3 : K6 strains and other serovars in the presence of acetic, citric and hydrochloric acids were studied. There were no di#erences in resistance to these acids between serovar O3 : K6 and the other serovars. At pH 5.6, citric acid was more e#ective in reducing the number of viable cells of V. parahaemolyticus than acetic acid. However, at pH 4.5, acetic acid was more e#ective than citric acid.