1　流行病学调查分析1963年 ,原新疆流行病防治研究所调查了沙湾山地 ,认为该地是疑似鼠疫自然疫源地。 1988年 8月在新疆沙湾后山博尔霍拉牧场发生一起人间鼠疫 ,同年从后山灰旱獭、长尾黄鼠及其寄生蚤———方形黄鼠蚤中分离到了 3株鼠疫菌 ,判定沙湾县为灰旱獭—长尾黄鼠双 1 Epidemiological Investigation and Analysis In 1963, the original Xinjiang Institute of Epidemiology investigated the Shawan Mountain, that the place is suspected of plague natural foci. In August 1988, an epidemic of human plague occurred in the Borjola Ranch in the back of the Shawan Backcountry in Xinjiang. In the same year, three strains of Y. pestis were isolated from the platycladus orientalis, the long-tailed salmon and their parasitic fleas, Judge Savannah gray marmot - long-tailed gopher double