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병원성 비브리오균과 동물성 플랑크톤과의 관계에 관한 연구
장동석(Dong Suck CHANG),김창훈(Chang Hoong KIM),유홍식(Hong Sik YU),김신희(Shin Hee KIM),정은탁(Eun Tak JEONG),신일식(Il Shik SHIN) 한국수산과학회 1996 한국수산과학회지 Vol.29 No.5
An ecological study on pathogenic vibrios was done in the aquatic environments of southern coast of Korea during summer in 1995, to investigate the distribution and relationship between pathogenic vibrio and zooplankton. Furthermore, special emphasis was given to study on the effects of zooplankton existence on the wintering of Vibrio cholerae in the aquatic region in Korea. During the study period, pathogenic vibrios were isolated from the samples such as V. parahaemolyticus, V. vulnificus, V. mimicus, and V. cholerae non O1, but V. cholerae O1 was not detected in any sample submitted in this study. Adsorption ratio of V. parahaemolyticus onto zooplankton was higher than that of E. coli. The efficiency of adsorption was found to be on the concentration of NaCl and other ions found in sea water. For example, adsorption ratio of V parahaemolyticus were 75% at 5 ‰ of NaCl solution and 55% at same salinity of diluted sea water, but those were decreased as 20% and 7% at 15 ‰ salinity of NaCl solution and diluted sea water, respectively. In addition, survival period of pathogenic vibrio was extended in the presence of live copepods at 25℃, but zooplankton existence has no significant effect on the survival rate at 5℃ in closed microcosm and also microalgae and dead copepods do not affect on the survival of V. parahaemolyticus. According to these experimental results, zooplankton has positive effects on the growth and survival rate of pathogenic vibrios in sea water during the summer season, but copepods have no significant effects on the growth and survival rate of them in winter season in Korea. Finally, authors suggest that V. cholerae is not able to over winter with zooplankton in adjacent sea water in Korea.
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