Abstract

Objective: To study virulence and regulatory genes (hlyA, ctxB, up in clinical strains of Vibrio cholerae (V. cholerae), simultaneously. Methods: Three important genes, lcpI, hlyA and ctxB were used for detection of toxigenic and pathogenic V. cholera by chain reaction assay method. Results: According to the results of the PCR, the incidence of hlyA, tcpI, and ctxB genes in clinical isolates was obtained as 94.7 (72 sample), 90.8 (69 sample), and 92.1 (70 sample), respectively. Five strains possessed all genes except ctxB, six strains possessed all genes except tcpI, four strains possessed all genes except hlyA, one strain possessed only hlyA and 60 strains contained a combination of three genes, Including hlyA, ctxB and tcpI. Conclusions: Result show that this method could be reliable to detect toxigenic pathogenic strains of V. cholerae in Iran.