Circulation of the serotype of Vibrio cholerae isolated in Tra Vinh

Abstract

From 25 Vibrio cholerae strains obtained in last study was conducted for serotyping by PCR and biochemical (ISO/TS 21872-1:2007). The serotyping results showed that there were six Vibrio cholerae strains belonged to biotype O1, with 50% (3/6) strains were positive with Inaba, and 50% (3/6) strains were positive with Ogawa. There was not strain belonged to biotype O139.
The adhesion indexes of V. cholerae strains were 55.7±13.9 and 59.3±4.2 in the intestinal mucosa of the rabbits were not orally administered with cholerae vaccine. These indexes were 12.4±0.6 and 7.41±1.9, higher than those of rabbits administered with cholerae vaccine.
The studied result also showed that the isolated strain shared the same serum type with the bacteria strain that was used to produce cholerae vaccine (moORCVAX) which was available in Viet Nam.