Ecological study of Vibrio cholerae in aquatic environments, Okayama

Sumio Shinoda, Mayumi Iwasaki, Tetsuya Sonoda, Yuki Furumai, Chizuko Miyake-Nakayama, Sei Ichi Katayama

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


An ecological and molecular-epidemiological study of Vibrio cholerae in some aquatic environments of Okayama was carried out. The strains of non-O1/non-O139 were isolated frequently, and unconventional O1 strains were rarely observed. These non-O1/non-O139 strains did not have ctxA, the gene of choleratoxin, the major pathogenic factor of epidemic cholera, but possessed hlyA, a gene encoding hemolysin thought to be a pathogenic factor for sporadic diarrhea or food poisoning. Furthermore these strains also had toxR, a gene controlling the pathogenic island of the V. cholerae genome, suggesting the potentia of these strains for accepting the horizontal transfer of virulence factor genes. Thus, continuous survey of the vibrio is to ensure the food safety of fishery products.

Original languageEnglish
Pages (from-to)117-121
Number of pages5
JournalBiocontrol science
Issue number3
Publication statusPublished - Sep 2010
Externally publishedYes


  • Bacterial ecology
  • Molecular epidemiology
  • Vibrio cholerae

ASJC Scopus subject areas

  • Applied Microbiology and Biotechnology
  • Public Health, Environmental and Occupational Health


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