Antibiotic sensitivity of Vibrio parahaemolyticus strains

The strains of Vibrio parahaemolyticus isolated from water, sediment, plankton, fish and prawn of Cochin backwater were tested for sensitivity to ten antibiotics namely, ampicillin, chloramphenicol, gentamycin, kanamycin, neomycin, oxytetracycline, penicillin, polymyxin-B, streptomycin and sulphadiazine. Of the 120 isolates tested, 96.7 and 93.3% were sensitive to gentamycin and chloramphenicol respectively. No strain was sensitive to penicillin and only 5% were sensitive to kanamycin. Isolates from fish and prawn showed higher resistance to ampicillin and none of them was sensitive to kanamycin. Multiple resistant V. parahaemolyticus strains were more in prawn than in other samples.