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Title: Isolation and Characterization of Pathogenic Vibrio harveyi(V. carchariae) From the Farmed Marine Cobia Fish Rachycentron canadum L. with Gastroenteritis Syndrome
Authors: Ping-Chung Liu
Ji-Yang Lin
Wen-Hsiao Chuang
Kuo-Kau Lee
Contributors: 國立臺灣海洋大學:水產養殖學系
Keywords: Cobia Rachycentron canadum L.
V. carchariae
Vibrio harveyi
Date: 2004
Issue Date: 2016-08-29T08:36:25Z
Publisher: World Journal of Microbiology and Biotechnology
Abstract: Abstract: An outbreak of serious mortality among the cultivated juvenile cobia Rachycentron canadum L. (weighing 8–10 g) characterized by a swollen intestine containing transparent yellow fluid (ascites and gastroenteritis) occurred in August 2001 in Taiwan. Ten motile bacterial strains, C3d1–C3d10, were isolated from head kidney (an organ located near the head of the fish) and/or the intestinal yellow fluid on tryptic soy agar supplemented with 1% NaCl (TSA1) and/or thiosulphate citrate bile salt sucrose (TCBS) agar plates. These strains were characterized and identified as Vibrio harveyi(V. carchariae) on the basis of biochemical characteristics, and comparisons with those of three reference strains, originally identified as V. harveyior V. carchariae. The strain C3d1 was selected as a representative strain for virulence tests and was found lethal to the cobia with an LD50 value of 7.48 × 104 colony forming units g−1 fish body weight. All the moribund/dead fish exhibited gastroenteritis as that observed in natural outbreak. The same bacteria could be reisolated from kidney and the transparent yellow fluid of swollen intestine of fish after bacterial challenge using TSA1 and TCBS plates. This is a first report showing that V. harveyi(V. carchariae) is the causative agent of gastroenteritis in the cobia.
Relation: 20(5)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/38351
Appears in Collections:[水產養殖學系] 期刊論文

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