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J.Health Sci., 54(6), 686-691, 2008
Role of the Enterotoxic Hemolysin in Pathogenicity of Vibrio mimicus
Tao Li, Akiko Kobayashi,
Noriko Takata, Tomonaga Yoshimura,
Yoko Maehara, Tomofusa Tsuchiya,
and Shin-ichi Miyoshi*
Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Tushima-Naka, Okayama 700-8530, Japan
Vibrio mimicus (V. mimicus) is a causative agent of human gastroenteritis and food poisoning. Although several toxic or virulence factors have been isolated from the bacterium, an enterotoxic hemolysin is a sole toxin produced by all clinical isolates. In the present study, we found that the antibody against the hemolysin significantly inhibited the fluidaccumulating action of the living cells inoculated into a rabbit ileal loop, and that the hemolysin gene (vmhA) was probably expressed by the bacterium in the ileal loop. Additionally, in spit of the comparable motility and similar proteome profiles, a vmhA mutant revealed the reduced fluid-accumulating activity. Theses findings suggest that the hemolysin contributes to full virulence of V. mimicus.
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