我们在1987年5～11月,在宁夏盐池县柳杨堡乡长爪沙鼠自然疫源地鼠间鼠疫流行期间对革螨进行了检菌工作。5～11月共检革螨1242只,其中鼠体螨68只,24组;巢穴螨1174只,86组。在10月下旬,从1组30只巢穴里的仓鼠真厉螨(Eulaelaps cricetuli)体内分离出1株鼠疫菌。通过对动物的致病性、形态特点、培养特点、噬菌体裂解试验和主要的生化试验及毒力测定等,确定为沙 We conducted a bacteriological examination of mites during the period of the plague epidemic in the natural foci of gopher gerbils in Liuyangpu Township, Yanchi County, Ningxia from May to November 1987. From May to November, a total of 1242 mites were found, of which 68 were mouse mites, 24 were mites, 1174 were mites, and 86 were mites. In late October, 1 Y. pestis was isolated from Eulaela cricetuli in a group of 30 nests. Through animal pathogenicity, morphological characteristics, culture characteristics, bacteriophage lysis test and the main biochemical tests and virulence determination, identified as sand