Objective To examine the distribution of host and virulence gene of Yersinia enterocolitis in Ningxia Hui Autonomous Region（Ningxia）for effective control of the spread of the bacteria.
Methods We collected various kinds of specimens in Ningxia from 2012 to 2017 for the culture and isolation of Yersinia enterocolitis strains; then serum agglutination test and virulence gene identification were performed for the isolated strains.
Results A total of 8 032 specimens were collected during the 6-year period and 146 Yersinia enterocolitis strains were indentified, with the detection rate of 1.81%. The pathogenic strains carrying ail, ystA, yadA, virF virulence gene were all belong to O : 3 serotype and were isolated from animal specimens.
Conclusion Yersinia enterocolitica is wide-spread in Ningxia. The detection rate of pathogenic Yersinia enterocolitica strains is the highest for specimens collected from pigs and the isolated strains are of high homology and of no difference in temporal distribution.
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