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      The occurrence of human pathogenic Vibrio spp. and Salmonella in aquaculture*

      International Journal of Food Science and Technology
      Wiley-Blackwell

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          The pathogenicity of Vibrio parahaemolyticus and the role of the thermostable direct haemolysin and related haemolysins

          T Honda, T Iida (1993)
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            VibrioInfections on the Gulf Coast: Results of First Year of Regional Surveillance

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              Urease production correlates with possession of the trh gene in Vibrio parahaemolyticus strains isolated in Thailand.

              A total of 489 Vibrio parahaemolyticus isolates from patients in Thailand with diarrhea was examined for the presence of thermostable direct hemolysin (TDH) and TDH-related hemolysin genes (tdh and trh, respectively), their serovars, TDH production, and urease activity. Of the strains, 81% were positive only for the tdh gene, 6% for both trh and tdh genes, and 2% for the trh gene only. Thirty-seven (8%) of the 489 isolates were positive for urease production. Of special interest, all urease-positive strains possessed the trh gene, and conversely, urease-negative strains lacked the gene, indicating that urease production by V. parahaemolyticus strains strongly correlates with the possession of the trh gene. Thus, the urease-positive phenotype of V. parahaemolyticus can be considered an indication of virulent (trh-possessing) V. parahaemolyticus strains in clinical diagnosis.
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                Author and article information

                Journal
                International Journal of Food Science and Technology
                Int J Food Sci Tech
                Wiley-Blackwell
                0950-5423
                1365-2621
                April 1998
                April 1998
                : 33
                : 2
                : 127-138
                Article
                10.1046/j.1365-2621.1998.3320127.x
                01ab643b-4cf8-4261-a42f-716a3b5a0237
                © 1998

                http://doi.wiley.com/10.1002/tdm_license_1.1

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