Antimicrobial Susceptibilities of Vibrio parahaemolyticus and Vibrio vulnificus Isolates from Louisiana Gulf and Retail Raw Oysters

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Abstract
The antimicrobial susceptibilities of 168 Vibrio parahaemolyticus and 151 Vibrio vulnificus isolates recovered from 82 Louisiana Gulf and retail oysters in 2005 and 2006 were determined. Overall, the two vibrios remained susceptible to the majority of antimicrobials tested; reduced susceptibility was detected only in V. parahaemolyticus for ampicillin (81%; MIC ≥ 16 μg/ml). Additionally, V. parahaemolyticus displayed significantly higher MICs for cefotaxime, ciprofloxacin, and tetracycline than V. vulnificus .