进入新的世纪,自来水为早日达到直饮标准,水质的要求不断提高,在国际和国内水质标准的各项指标中,由于一些微生物能在同一时间内造成大片人群发病或死亡的严重后果,一直倍受各方关注。水源中,除了我们已熟知的细菌外,隐孢子虫、贾第鞭毛虫也是普遍存在的微生物之一。但直至1976年,人们才发现“两虫”会通过其卵囊在原水及饮用水中传播,而且到目前为止,“两虫”引起的疾病,还没有针对性的治疗方法,以致该病引起的周期性腹泻,对感染者尤其是免疫系统薄弱者的健康乃至生命都构成了严重威胁。1984年和1987年,美国先后两次爆发了隐孢子虫病,病例总人数为1.5万 In the new century, tap water has reached the standard of direct drinking as soon as possible and the water quality requirements have been continuously raised. Since some microorganisms can cause serious consequences of the onset or death of large population at the same time among the indicators of international and domestic water quality standards, Much attention from all parties. Water, in addition to the bacteria we are already familiar with, Cryptosporidium, Giardia is also one of the ubiquitous microorganisms. However, it was not until 1976 that people discovered that “two kinds of insects” would spread through their oocysts in raw water and drinking water. So far, there are no specific treatments for diseases caused by “two insects” As a result, the periodic diarrhea caused by this disease poses a serious threat to the health and even life of those infected, especially those with weak immune system. In 1984 and 1987, the United States had two outbreaks of cryptosporidiosis, the total number of cases was 15,000