1.Yunnan Institute of Endemic Diseases Control and Prevention, Dali 671000, China; 2.Gucheng District Center for Disease Control and Prenvention,Lijiang 674100,China; 3.Heqing County Center for Disease Control and Prenvention,Dali 671500,China; 4.National Institute for Communicable Disease Control and Prevention, Beijing 102206, China
Abstract：We investigate the primary host animals(rodent) and indicator animals(domestic dog) carrying Yersinia enterocolitica in Apodemus chevrieri and Eothenomys miletus plague foci, and to grasp the ecological distribution characteristics of the Yersinia enterocolitica in the plague natural foci. By isolating Yersinia enterocolitica from samples of rodents and domestic dogs, testing serotype and biotype and virulence gene. Results showed that 43 strains of Yersinia enterocolitica were detected from62 rodent specimens with a carrying rate of 35.5%. The 96 strains of Yersinia enterocolitica were detected from171 dogs specimens with a carrying rate of 26.3%.The 138 strains of Yersinia enterocolitica were biotype 1A.One strain of Yersinia enterocolitica was biotype 3 and serotypeO∶3. In conclusion, the carring rate of Yersinia enterocolitica of rodents were more than domestic dogs. Nonpathogenic Yersinia enterocolitica was the dominant strain. It is important to research the distribution and biological characteristics of Yersinia enterocolitica in the plague foci for disease prevention and control, and it is also helpful to investigate the long-term preservation and variation mechanism and correlation of pathogenic Yersinia in nature.
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