Development of simple and rapid PCR‐fingerprinting methods for Vibrio cholerae on the basis of genetic diversity of the superintegron

摘要: Aims: To develop simple and rapid PCR‐fingerprinting methods for Vibrio cholerae O1 (El Tor and classical biotypes) and O139 serogroup strains which cause major cholera epidemics, on the basis of the diversity of superintegron (SI) carried by these strains. Methods and Results: PCR‐restriction fragment length polymorphism (PCR‐RFLP) assay was developed targeting region between integrase gene in the SI and its nearby ORF, followed by BglI digestion. Besides, a V. cholerae repeat‐amplified fragment length polymorphism (VCR‐AFLP) assay was also developed. In the PCR‐RFLP, 94 El Tor, 29 classical and 54 O139 strains produced nine, three and six different DNA fingerprints, respectively. On the other hand, VCR‐AFLP distinguished these El Tor, classical and O139 strains into five, nine and two DNA fingerprints, respectively. Combining both assays the El Tor, classical and O139 …