Identification of Vibrio harveyi using PCR amplification of the toxR gene

L. Pang, X. H. Zhang, Y. Zhong, J. Chen, Y. Li, B. Austin

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    Abstract

    Aims: The aim of this study was to develop an effective method for the identification of Vibrio harveyi based on using the toxR gene as a taxonomic marker. Methods and Results: Primers for the toxR gene were designed for specificity to V. harveyi, and incorporated in a polymerase chain reaction (PCR). The results of the PCR, which took <5 h from DNA extraction to amplification, revealed positive amplification of the toxR gene fragment in 20 V. harveyi isolates including type strains, whereas DNA from 23 other Vibrionaceae type strains and 13 Vibrio parahaemolyticus strains were negative. The detection limit of the PCR was 4.0 × 103 cells ml -1. In addition, the technique enabled the recognition of V. harveyi from diseased fish. Conclusions: The PCR was specific and sensitive, enabling the identification of V. harveyi within 5 h. Significance and Impact of the Study: The PCR allowed the rapid and sensitive detection of V. harveyi. © 2006 The Authors.

    Original languageEnglish
    Pages (from-to)249-255
    Number of pages7
    JournalLetters in Applied Microbiology
    Volume43
    Issue number3
    DOIs
    Publication statusPublished - Sep 2006

    Keywords

    • Diseased fish
    • Identification
    • Polymerase chain reaction
    • toxR gene
    • Vibrio harveyi

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