Prevalence of virulence genes of Yersinia enterocolitica isolated from pig at slaughterhouses in Ha Noi

Abstract

Yersinia enterocolitica is a bacteria causes food poisoning commonly in the developed countries, standing after Campylobacter and Salmonella. It is the causative agent of yersiniosis, a zoonotic disease. The purpose of this study was to initially determine the presence of virulent genes in the Yersinia enteratioitica strains. 20 strains of Yersinia enterocolitica isolated from pigs
at the slaughterhouses in Ha Noi were determined for the presence of some virulent genes (ail, inv, ystA, ystB and yadA) by PCR technique. As a result, 80% of strains carried ail gene, 60% of strains carried ystA gene, 50% of strains carried inv gene, 45% of strains carried yadA gene and only 10% of strains carried ystB gene. The studied result also indicated that not all the pathogenic Yersinia enterocolitica strains must carry all the virulent genes and in the nonpathogenic bacteria strains also present some virulent factors