隐孢子虫病是一种人畜共患病 ,是免疫缺陷者 (如艾滋病 )常见的机会性感染 ,也可在免疫功能正常的人群中传播与流行[1] 。国内 1987年韩范报道了第一例[2 ] ,后来其他省市亦相继发现此病。为了解本省此病的流行情况 ,于 1997年 5月～ 1998年 6月对兰州、张掖和酒泉 3个地县医院 Cryptosporidiosis, a zoonotic disease, is a common opportunistic infection in immunocompromised persons (such as AIDS) and can also be transmitted and prevalent among people with normal immune function [1]. Han Fan in 1987 reported the first case of domestic [2], then later provinces and cities have also found the disease. In order to understand the prevalence of the disease in this province, from May 1997 to June 1998 on Lanzhou, Zhangye and Jiuquan three county hospitals