Antimicrobial resistance of Vibrio parahaemolyticus isolates from oyster sold in Thu Duc city, Ho Chi Minh City

This study was conducted to determine the rate of antibiotic resis tance in 75 Vibrio parahaemolyticus strains isolated from oysters sold in Thu Duc city, Ho Chi Minh City. The results of the anti biotic susceptibility test showed that all strains were sensitive to chloramphenicol and florfenicol, but resistant to ampicillin. The percentages of isolates resistance to streptomycin, tetracycline, trimethoprim/sulfamethoxazol, nalidixic acid, ciprofloxacin, enrofloxacin, nitrofurantoin were 56%; 4%; 4%; 4%; 22,7%; 38,7%, respectively. The percentage of multiple resistant isolates from two to six tested antibiotics was 96% and the multiple antibiotic resis tance (MAR) index ranged from 0.2 to 0.42.