Open AccessDevelopment and evaluation of a multiplex PCR assay for rapid detection of toxigenic Vibrio cholerae O1 and O139
Author(s) -
Hoshino Katsuaki,
Yamasaki Shinji,
Mukhopadhyay Asish K,
Chakraborty Soumen,
Basu Arnab,
Bhattacharya Sujit K,
Nair G.Balakrish,
Shimada Toshio,
Takeda Yoshifumi
Publication year - 1998
Publication title -
fems immunology & medical microbiology
Language(s) - English
Resource type - Journals
eISSN - 1574-695X
pISSN - 0928-8244
DOI - 10.1111/j.1574-695x.1998.tb01128.x
Subject(s) - vibrio cholerae , multiplex polymerase chain reaction , biology , multiplex , amplicon , microbiology and biotechnology , cholera toxin , polymerase chain reaction , toxin , virology , bacteria , gene , genetics
A multiplex polymerase chain reaction assay was developed for concurrent detection of rfb sequences specific for the O1 and the O139 serogroups of Vibrio cholerae and for ctxA specific sequences. The multiplex PCR assay was found to be highly specific and sensitive and was capable of detecting 65 cfu and 200 cfu per assay of V. cholerae O1 and O139, respectively. Evaluation of the multiplex PCR assay using 121 stool samples from patients admitted to the Infectious Diseases Hospital, Calcutta, showed the assay to be 100% sensitive and 95.2% specific when the culture method was taken as the standard. In addition to the 38 PCR positive stool samples, an additional four samples which were negative by culture method but positive by PCR assay belonged to the O139 serogroup. All the 38 stool samples positive for either O1 or O139 serogroup by PCR assay were also positive for the ctxA amplicon indicating that the O1 and O139 V. cholerae strains have the genetic potential of producing cholera toxin.