SEROTYPES OF VIBRIO-CHOLERAE NON-O1 ISOLATED FROM WATER-SUPPLIES FOR HUMAN CONSUMPTION IN CAMPECHE, MEXICO AND THEIR ANTIBIOTIC SUSCEPTIBILITY PATTERN

The presence of Vibrio cholerae non-O1 in water supplies for human con sumption in the city of Campeche and rural locality of Becal was inves tigated. V. cholerae non-O1 was detected in 5.9% of the samples obtain ed in deep pools of Campeche. Studies conducted in Becal and neighbour hood of Morelos in Campeche indicated that collected samples harbored V. cholerae non-O1 in 31.5% and 8.7% respectively. There was a particu lar pattern of distribution of V. cholerae non-O1 serotypes among diff er ent studied regions. Accordingly, V. cholerae non-O1 serotype O14 p redominated in the deep pools of Campeche and together with V. cholera e non-O1, O155 were preferentially founds in samples taken from intrad omiciliary faucets in the neighbourhood of Morelos. Samples from Becal predominantly presented the serotype O112. 60% and 53.8% of all studi ed strains of V. cholerae non-Ol proved to be resistant to ampicillin and carbenicillin. 3.1%, 7.7% and 6.2% presented resistant to doxycycl ine, trimethoprim-sulfamethoxazole and erythromycin respectively. The study showed the necessity of performing a strong epidemiologic survei llance for emergence and distribution of V. cholerae non-O1.