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, Hirotaka Hiyoshi2
, Eiji Arakawa1, Hidemasa Izumiya1
, Makoto Ohnishi1, Kikuyo Ogata3, Mari Sasaki4, Hiroshi Narimatsu4, Emiko Kitagawa5, Yukihiro Akeda1
and Toshio Kodama2
In 2013, foodborne outbreaks in Japan were linked to non-O1, non-O139 Vibrio cholerae. However, laboratory tests have detected several serogroups, making it difficult to determine the causative agent. Therefore, whole-genome analyses revealed that only serogroup O144 V. cholerae possesses a genomic island with a type III secretion system (T3SS). A T3SS-deficient mutant was subsequently generated, and its pathogenicity was assessed using a rabbit ileal loop test. This led to the conclusion that serogroup O144 V. cholerae with T3SS was the causative agent of foodborne outbreaks. This study provides an illustrative example of the utilization of whole-genome data for pathogenicity and molecular epidemiological analyses in outbreak investigations.
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