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. 1990 Jun;56(6):1547–1550. doi: 10.1128/aem.56.6.1547-1550.1990

Screening of aquatic samples for Vibrio cholerae serotype O1 by a dot-blot method and a latex agglutination test.

Y Nishikawa 1, A Hase 1, E Ishii 1, T Kishi 1
PMCID: PMC184469  PMID: 2200338

Abstract

A dot-blot, enzyme-linked immunosorbent method and a latex agglutination test were studied for their abilities to detect Vibrio cholerae serotype O1 in aquatic samples by testing artificially contaminated water as well as samples from natural potential sources. Water samples were preenriched with alkaline peptone and then enriched with Monsur peptone water. For the dot-blot test, enriched cultures of organisms in a small portion of the Monsur peptone water were transferred to a polyvinylidene difluoride membrane with a microfiltration apparatus. The enzyme-linked immunosorbent assay was performed by using biotin-labeled antibodies and avidin-biotin-peroxidase complex; brown dots developed in the wells that contained serotype O1 vibrios. Latex agglutination tests were performed by mixing 1 drop of the culture in Monsur with 1 drop of reagent coated with monoclonal antibody specific for antigen A. The sensitivities and specificities of the methods were compared with those of the colony-blot method, which identified individual colonies of V. cholerae O1 in mixed bacterial cultures on isolation media. Our results indicate that the dot-blot method is as sensitive as the colony-blot method and is useful for screening for V. cholerae serotype O1 even in specimens that are heavily contaminated with non-O1 vibrios.

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Selected References

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