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贾第虫病是全球分布的传染性较强的肠道原虫病之一。世界卫生组织估计感染率为1～20%,与卫生状况密切有关,有的人群可高达50～70%。60和70年代,在地中海地区智利、美,意、苏等地均有过较大规模的水源性暴发流行。有的国家发病率已超过肠阿米巴病,故对其危害性严重性日益得到重视,从而加强了研究,取得了一些进展,在我国亦逐步引起注意。一、对贾第虫病致病性的认识以往认为贾第虫是一种共生性致病力未定的肠道鞭毛虫。近十多年来大量证据表明贾第虫是致病性的肠道原虫,与腹泻直接有关。流行病学调查志愿者及临床病例均予肯定:腹泻者该虫检出率高于无肠病者,带虫者腹泻发生率高于非带虫者,志愿者吞食其包囊可导致腹泻,有效抗虫治
Gicarcinosis is one of the more contagious enterocolitics worldwide. The WHO estimates the infection rate is 1 ~ 20%, closely related to health status, and some people can be as high as 50 to 70%. In the 1960s and 1970s, there were relatively large-scale water-based outbreaks in Chile, the United States, Italy, and the Soviet Union in the Mediterranean region. In some countries, the incidence rate has exceeded that of intestinal amoebiasis. Therefore, the severity of its harm has been given more and more attention. As a result, the research has been strengthened and some progress has been made. In our country, more attention has been paid to it. First, understanding of the pathogenicity of giardiasis In the past that giardiasis is a commensal pathogenicity of undetermined intestinal flagellates. In the past ten years, a large amount of evidence shows that Giardia is a pathogenic enteric protozoa, which is directly related to diarrhea. Epidemiological survey of volunteers and clinical cases are affirmed: the incidence of diarrhea in the worm is higher than those without enteropathy, the incidence of diarrhea in mosquitoes is higher than non-parasites, volunteers swallow their cysts can lead to diarrhea, Effective anti-insect treatment