PCR Detection and Investigation of Distribution of Virolence Factors for Yersinia enterocolitic Serotype O∶3 and O∶9
JING Huai-qi *,LI Ji-yao,XIAO Yu-chun,et al. *National Institute of Communicable Diseases Prevention and Control,Chinese Center for Diseases Control and Prevention,P. O. Box5,Changping Beijing 102206,China
Objective To investigate the contribution of virulence factors of common pathogenic Yersinia serotypes in China. Methods Developed PCR technology described by other authors was used to detect the virulence factors. Results The contribution characters of the main Yersinia serotypes O∶3 and O∶9 in China were ail +,yst +,ystB -,yadA +,virF +( 56.2% );ail +,ystA +,ystB -,yadA -,virF -( 25.6% ),other serotypes were 18.2% . Conclusion It was confirmed that the main virulence factors that caused Yersinia enterocolitis outbreak and epidemics in China were ail +,ystA +,ystB -,yadA +,virF +. The minor parts were ail +,ystA +,ystB -,yadA -,virF -,which were considered the result of lost of virulent plasmid at the past time. Other serotypes maybe the non-pathogenic strains.
【CateGory Index】： R378