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KMID : 0364820120480010022
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Korean Journal of Microbiology
2012 Volume.48 No. 1 p.22 ~ p.28
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Antibiotic Resistance and Plasmid Profile of Vibrio parahaemolyticus Strains Isolated from Kyunggi-Incheon Coastal Area
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Han A-Rheum
Yoon Young-June
Kim Jung-Wan
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Abstract
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Vibrio parahaemolyticus is one of the major agents responsible for food poisoning during summer in Korea, which is
transmitted via seawater or seafoods. Recently, distribution of the bacteria in the marine environment has been
increased due to global warming. Great concern also has been raised regarding public hygiene as well as marine
culture by the emergence of pathogens with antibiotic resistance. Therefore, distribution of V. parahaemolyticus and
antibiotic resistance of the isolates were monitored in 7 coastal areas of Kyonggi Province and Incheon by sampling
seawater, fishes and clams monthly. V. parahaemolyticus was detected from 47.7% of 966 samples (seawater 61.9%,
seafoods 41.8%) analyzed using CHROMagarTM and TCBS agar plates as well as multiplex PCR. Among 13
antibiotics tested, resistance to vancomycin and ampicillin was observed in 97.3% and 87.3% of the isolates,
respectively, and the ratios of them resistant to cephalothin (48.8%) and rifampin (46.1%) were also high. The
isolates were most highly sensitive to chloramphenicol (91.7%) and trimethoprim-sulfamethoxazole (91.8%). The
ratio of sensitivity for other antibiotics was also high in the descending order of gentamycin (82.3%), tobramycin
(74.8%), nalidixic acid (71.6%), tetracyclin (69.4%), cefotaxime (63.0%). About 69% of the isolates showed
multiple drug resistance toward 3 antibiotics including vancomycin and ampicillin. Two of them exhibited resistance
for 11 antibiotics used in this study. Plasmid profile analysis of the isolates with antibiotic resistance revealed that
55.1% of them retained plasmids of 24 different types. However, no clear inter-relationship between the resistance
and the plasmid profile has been observed.
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KEYWORD
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V. parahaemolyticus, antibiotics resistance, distribution, multiple resistance, plasmid profile
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