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目的 为了解陕西省动物鼠疫流行的病原特点。方法 对2000～2001年定边县分离于不同宿主、媒介动物的19株鼠疫菌进行了生化、毒力因子和毒力测定。结果 所有菌株生化特点一致,4种毒力因子除1株菌为Pgm±外,均齐备。对5株菌的毒力测定LD_(50)介于41～180之间。结论 分离菌株为鄂尔多斯高原生态型强毒鼠疫菌。
Objective To understand the epidemiological characteristics of animal plague in Shaanxi Province. Methods The biochemical, virulence factors and virulence of 19 strains of Yersinia pestis isolated from different hosts and vector animals in Dingbian County from 2000 to 2001 were determined. Results All the strains had the same biochemical characteristics. All four virulence factors except Pgm ± were all available. The virulence of five strains of LD_ (50) ranged from 41 to 180. Conclusion The isolates are ecotype virulent Yersinia pestis in Erdos plateau.