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Antimicrobial-resistance Profiles and Virulence Genes of Vibrio parahaemolyticus Isolated from Seawater in the Wando Area

완도해역 해수에서 분리한 장염비브리오(Vibrio parahaemolyticus)의 항균제 내성 및 병원성 유전자의 특징

  • Kim, Tae-Ok (Department of Food Science and Biotechnology, Kunsan National University) ;
  • Eum, In-Seon (Department of Food Science and Biotechnology, Kunsan National University) ;
  • Jo, Sang-Man (Department of Marine Life and Aquaculture, Kunsan National University) ;
  • Kim, Hee-Dai (Department of Biotechnology and Biomedicine, Chungbuk Provincial College) ;
  • Park, Kwon-Sam (Department of Food Science and Biotechnology, Kunsan National University)
  • 김태옥 (군산대학교 식품생명공학과) ;
  • 엄인선 (군산대학교 식품생명공학과) ;
  • 조상만 (군산대학교 해양생명과학과) ;
  • 김희대 (충북도립대학 바이오생명의약과) ;
  • 박권삼 (군산대학교 식품생명공학과)
  • Received : 2014.03.04
  • Accepted : 2014.05.27
  • Published : 2014.06.30

Abstract

Sixty-seven Vibrio parahaemolyticus isolates from surface seawater from the Wando area, on the southern coast of Korea, were analyzed for their susceptibility to 15 different antimicrobials and the presence of virulence genes. According to the disk diffusion susceptibility test, all of the strains studied were resistant to ampicillin and oxacillin, while decreasing percentages were resistant to vancomycin (64.2%), streptomycin (56.7%), amikacin (31.3%), kanamycin (22.3%), cephalothin (20.9%), erythromycin (10.4%), ciprofloxacin (4.5%), and tetracycline (3.0%). All of the strains were susceptible to five antimicrobials: chloramphenicol, gentamycin, nalidixic acid, sulfamethoxazole/trimethoprim, and trimethoprim. Fifty-nine isolates (88.1%) were resistant to three or more classes of antimicrobial and defined as multidrug resistant, and two strains were resistant to seven antimicrobial agents. The minimum inhibitory concentration (MIC) of the 67 V. parahaemolyticus isolates to ampicillin and oxacillin ranged from 512-2,048 and $64-512{\mu}g/mL$, respectively. All 67 isolates were also examined for the presence of the tdh and trh virulence genes using the polymerase chain reaction (PCR). However, no isolates possessed either tdh or trh. The VPA0477 (${\beta}$-lactamase) gene, present in all of the tested strains, was validated as a new specific marker gene in PCR assays for the accurate detection and identification of V. parahaemolyticus.

Keywords

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  1. Application of the β-lactamase (VPA0477) Gene for the Detection of Vibrio parahaemolyticus by Polymerase Chain Reaction vol.47, pp.6, 2014, https://doi.org/10.5657/KFAS.2014.0740