Study on biology and epidemiological characteristics of vibrio cholerae non-O1 strains isolated from environmental waters in Foshan city / 中华预防医学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To study the distribution of serotype and the positive rate of toxins among vibrio cholerae non-O(1) isolated from environmental waters in Foshan city.</p><p><b>METHODS</b>Water specimens were collected from river and cultured for vibrio cholerae non-O(1). The PCR method was used to detect cholerae enterotoxin (CT) gene; the ELISA method was used to detect heat-stable toxin (ST) and heat-labile toxin (LT).</p><p><b>RESULTS</b>478 vibrio cholerae non-O(1) strains were isolated from 1 644 water specimens, with a positive rate of 29.07%. Serological assay showed that the main serotype of vibrio cholerae non-O(1) in Foshan city is VBO(7). Positive rate of CT, ST and LT were 1.91%, 13.14% and 12.17%, respectively.</p><p><b>CONCLUSIONS</b>A few non-O(1) strains were found to have several virulent factors simultaneously, and the results suggest that vibrio cholerae non-O(1) in environmental waters is potentially pathogenic and may affect people's health. It is necessary to pay attention to the prevention of diarrhoea caused by vibrio cholerae.</p>