• 한국수산과학회지
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• 제47권5호
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• pp.556-561
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• 2014

We applied a combination of most probable number-polymerase chain reaction (MPN-PCR) methods using a PCR procedure targeting the H-NS (VP1133) gene to detect Vibrio parahaemolyticus presence and density in seawater as well as within short-necked clam Ruditapes philippinarum tissues collected from Gomso Bay, Korea. In 30 seawater samples, V. parahaemolyticus levels ranged from less than 1.8 to $1.1{\times}10^3MPN/100mL$, and samples from August showed higher than those from other months. Furthermore, the levels of V. parahaemolyticus in six short-necked clam samples ranged from $7.8{\times}10^2$ to $2.1{\times}10^3MPN/100g$, approximately 2.5 times higher than in seawater samples from the corresponding month. Our results provide data on V. parahaemolyticus contamination in seawater and short-necked clam tissues, and help to improve quantitative methods of assessing V. parahaemolytcius levels.

• 한국식품위생안전성학회지
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• 제15권2호
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• pp.173-175
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• 2000

V. parahaemolyticus 종류들이 gelatin분해 확인 실험에서 큰 clear zone을 형성했고, V. alginolyticus 분리균주도 V. parahaemolyticus와 비슷한 clear zone을 형성했다. V. fluvialis KCTC 2473은 clear zone을 형성하지 못했다. Hemolytic activity측정 실험에서는 V. parahaemolyticus 분리균주(2)가 가장 활성이 크게 나타났고, V. parahaemolyticus ATCC 17802, V. parahaemolyticus 분리균주(1)과 V. mimicus ATCC 33653도 높은 활성을 나타냈으며, 나머지 다른 비브리오균은 활성이 나타나지 않았다. Azocasein분해 활성 실험에서는 V. parahaemolyticus ATCC 17802, 분리균주(1), 분리균주(2)는 200EU/m1전후로 활성이 높게 나타났고, 나머지는 110EU/ml전후로 활성이 상대적으로 낮게 나타났다.

• 한국수산과학회지
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• 제9권4호
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• pp.233-237
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• 1976

충무연안의 한실포에서 인평포에 이르는 굴${\cdot}$홍합 양식장(Fig.1)을 중심으로 1975년 7월부터 1976년 9월까지 매월, 해수, 이토, 굴 및 담치에서 V.parahaemolyticus와 V. alginolyticus의 분포를 조사한 결과를 요약하면 다음과 같다. 1. 해수, 이토, 굴 및 담치, 420개 시료에서 parahaemolyticus 51균주와 V. alginolyticus 160 균주를 분리하였다. 2. 월별분리율은 7월-9월에 가장 높았다. 3. 시료별 parahaemolyticus의 분리율은 이토$(28\%)$, 해수$(24\%)$, 담치$(5\%)$ 및 굴$(4.2\%)$의 순이였다. 4. 조사지점별 분리율은 station 1 과 5가 다른 조사지점에 비해 가장 높았다. 5. 분리된 211 균주의 형태적 생리적 생화학적성상은 전형적인 parahaemolyticus 및 V. alginolyticus와 및 일치하였다.

• 한국식품위생안전성학회지
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• 제18권2호
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• pp.61-66
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• 2003

본 연구는, Vibrio parahaemolyticus에 대한 면역 글로블린 Y(IgY)를 생산하기 위하여 시행되었다. Vibrio parahaemolyticus는 중요한 병원성 균이며, 위장염을 유발시키는 원인 균이다. 따라서, 난황에서 Vibrio parahaemolyticus에 대한 항체를 생산하기 위하여 항원 LPS(lipopolysaccharide)를 암탉에 주사하였다. 면역은 2주 간격으로 4차까지 실시하였으며, 추가면역으로 2주 간격으로 3차까지 실시한 후 ELISA로 그 항체 역가를 측정하였다. 난황에서의 항체생성은 1차 면역 후 1주일부터 나타나기 시작하였으며, 7주에 최고 역가에 도달하였고, 이러한 역가는 13주 이후까지 지속되는 것으로 나타났다. 한편 혈청에서의 항체 역가도 난황에서의 경향과 유사하였다. 정제시킨 IgY를 본 연구의 water-dilution방법과 상업용 IgY분리 kit로 그 정제 정도를 비교해본 격과 큰 차이를 나타내지 않았으며, Vibrio parahaemolyticus외의 다른 Vibrio 속 및 세균들과의 교차반응성 조사에서 특별한 교차반응이 없었다. 본 연구에 나타난 결과로, 아주 적은 양의 LPS 항원으로 역가가 높은 항체의 생산이 가능하였으며, 이러한 결과들로 보아 난황은 유행성 위장염을 유발하는 병원성 균의 특이 항체 개발을 위한 좋은 공급원이 될 것으로 생각된다.

• Journal of Microbiology and Biotechnology
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• 제14권1호
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• pp.41-47
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• 2004

This study was performed to investigate the antimicrobial effects of hetero-chitosans and their oligosaccharides on the halophilic bacterium, Vibrio parahaemolyticus. Nine classes of hetero-chitosan oligosaccharides were prepared based on their molecular weights, using an ultrafiltration membrane reactor system with chitosanase and celluase, from partially different deacetylated chitosans, 90%, 75%, and 50% deacetylated chitosan, respectively. Thirty-two strains of V. parahaemolyticus were isolated from various marine organisms such as shellfish, shrimps, octopus, and seabirds. Seventy-five percent deacetylated chitosan showed the highest antimicrobial acitivity. The minimal inhibitory concentration (MIC) was 0.5 mg/ml on 14 strains of V. parahaemolyticus, and MIC of the rest strains (18 strains) was 1.0 mg/ml. In addition, MIC of most hetero-chitosan oligosaccharides was 8.0 mg/ml. The results revealed that the antimicrobial effects of hetero-chitosans and their oligosaccharides against V. parahaemolyticus depend on the degree of deacetylation, their molecular weights, and strains tested.

• Food Science and Biotechnology
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• 제14권3호
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• pp.410-412
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• 2005

Vibrio parahaemolyticus is a gram-negative bacterium which acts as a causative agent for food poisoning. Studies with respect to specific extracellular proteins of V. parahaemolyticus would be useful for the development of specific detection methods against V. parahaemolyticus. In our present study, outer membrane proteins (OMPs) of V. parahaemolyticus were obtained from insoluble traction of 1% sarkosyl treated-cell wall materials. SDS-PAGE analysis showed the presence of several conserved outer membrane proteins among five strains of V. parahaemolyticus, and three bands were identified as V. parahaemolyticus OMPs through MALDI-TOF analysis. Polyclonal antibodies enriched with anti-OmpU were obtained from immunized rabbits. The antibodies against these proteins may be useful for the development of detection methods for V. parahaemolyticus.

• 한국수산과학회지
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• 제43권2호
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• pp.125-130
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• 2010

A trimethoprim resistant Vibrio parahaemolyticus, which cause acute gastroenteritis in humans, was isolated from farmed fish and seawater. The resistance profiles of isolated V. parahaemolyticus and their correlation with mobile elements were investigated. All of the V. parahaemolyticus were resistance to both rifampin and trimethoprim. The presence of class I integron was confirmed by PCR. PCR-amplified inserted gene cassettes contained aminoglycoside aac6-II, rifampin arr-3 and trimethoprim dfrA27 resistance genes. This study indicated that class I integron mainly contributed to the circulation of trimethoprim resistance determinants in V. parahaemolyticus.

• Journal of Microbiology
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• 제42권2호
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• pp.74-79
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• 2004

Ingestion of shellfish-associated Vibrio parahaemolyticus is the primary cause of potentially severe gas-troenteritis in many countries. However, only Kanagawa phenomenon (hemolysin) positive (KP$\^$+/) strains of V. parahaemolyticus are isolated from patients, whereas >99％ of strains isolated from the environment do not produce this hemolysin (i.e. are KP$\^$-/). The reasons for these differences are not known. Following a temperature downshift, Vibrio parahaemolyticus enters the viable but noncultur-able (VBNC) state wherein cells maintain viability but cannot be cultured on routine microbiological media. We speculated that KP$\^$+/ and KP$\^$-/ strains may respond differently to the temperature and salinity conditions of seawater by entering into this state which might account for the low numbers of cul-turable KP$\^$+/ strains isolated from estuarine waters. The response of eleven KP$\^$+/ and KP$\^$-/ strains of V. parahaemolyticus following exposure to a nutrient and temperature downshift in different salinities, similar to conditions encountered in their environment, was examined. The strains included those from which the KP$\^$+/ genes had been selectively removed or added. Our results indicated that the ability to produce hemolysin did not affect entrance into the VBNC state. Further, VBNC cells of both biotypes could be restored to the culturable state following an overnight temperature upshift.

• 미생물학회지
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• 제35권3호
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• pp.185-191
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• 1999

본 연구는 1997년 1월부터 1997년 11월까지 낙동강 기수지역인 다대포의 모래에서 서식하는 식용 쌍패각 조개인, 빛조개로부터 비브리오를 분리 동정한 것이다. 표현형을 중심으로 한 새와학적 성상으로 빛조개의 내장으로부터 Vibrio alginolyticus, V. parahaemolyticus, V. cholerae non-O1, V. vulnificus, V. salmonicida 및 V. tubiashii 등 8종의 비브리오가 동정되었다. 수온이 $15^{\circ}C$ 이하에서 성장이 불가능한 병원성 세균인 V.parahaemolyticus 가 동절기에 및조개로부터 분리됨으로서 빛조개가 자연계내에서 V.parahaemolyticus 의 월동 보균체중의 하나라는 결론을 얻게 되었다.

• 생명과학회지
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• 제10권1호
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• pp.94-100
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• 2000

Urease is an important microbial enzyme and its production is a marker to predict potential pathogenicity. An unusual halophilic bacterium producing urease was isolated from sea product and identified as Vibrio parahaemolyticus KH410. Its biochemical properties were indole negative, gelatin positive, sodium citrate positive and Kanagawa positive whereas other characteristics were identical as the standard strain except it showed a positive reaction on Christensen's urea agar. V. parahaemolyticus urease production was directly related to urea concentration. The production of urease was noticeable by the addition of 0.2% urea, 0.5% glucose, 2% NaCl in LB broth, and the initial pH of 5.5. The maximum production reached after 6 hr of incubation at 37$^{\circ}C$. However, NiCl2, metal ions, phosphorus did not affect production of urease.