Prevalence, antimicrobial resistance profiles and virulence genes of Vibrio spp. isolated from shrimp retails in Ho Chi Minh City (Vietnam)

Abstract

This study was conducted to determine the diversity of pathogenic Vibrio species, the antimicrobial resistance profile and the presence of virulence genes linked to food-borne pathogens of Vibrio spp. isolated from shrimp samples in Ho Chi Minh City, Vietnam. A total of 40 raw shrimp batches were collected from retails markets (supermarket and street). All 133 test strains were isolated from 40 shrimp samples. V. parahaemolyticus was the most common species (87.5%), followed by V. navarrensis (60%), V. alginolyticus (52.5%), V. cholerae non-O1 (37.5%), V. vulnificus (22.5%), and V. fluvialis (10%). Vibrio spp. isolates were susceptible to 12 antimicrobial agents. The prevalence of ampicillin resistance was highest (82.7%), followed by cotrimoxazole (18.8%) and 3rd generation cephalosporins (16.5% cefotaxime and 8.3% ceftazidime). Extended spectrum β lactamase (ESBL) activity was detected in 28.1% V. parahaemolyticus isolates. None of tdh or trh virulence genes were detected. The results of this study indicated the presentation of Vibrio species in shrimp samples purchased in Ho Chi Minh City. Therefore, our results could be of great potential for the identification of Vibrio infection in shrimp samples taken from different regions to improve food quality and safety.