Abstract：【Abstract】 To investigate the pathogenic characteristics of Yersinia enterocolitica isolated from oral-pharyngeal swab (tonsils) samples in Dengfeng area. 331 strains of Y. enterocolitica were isolated from 1346 pharyngeal swab, the detection rate was 24.59%.These bacteria were analysed by the systematic biochemistry, serotyp and PCR detection methods. It were identified three serotypes(O:3,O:5,O:8)，of which 84.6% ,2.1% and 1.8% respectively.while they belonged to three biological type(1A, 3 and 4 ). Distribution characteristics of toxicity gene were as follow: ail+、ystA+、ystB-、yadA+、virF+ accounted for 80.67℅, ail+、ystA+、ystB-、yadA-、virF- accounted for 3.32℅,they were all O:3 serotype;others accounted for 16.01℅.From these observations,it is evident that swine is the dominant animal host and most of Yersinia enterocolitica strains isolated from it are pathogenic.It should be strengthened the monitoring, quarantine and management of swine in the future.
2012, Vol. 28 
