兰氏贾第鞭毛虫(简称贾第虫)是一种主要寄生于人体消化道的致病原虫,可引起腹泻,消化不良等症状。Wolfe 发现它是旅行者腹泻的常见病因。此病在欧美不少国家已成为最常见的寄生虫病,感染率为7～44%之间。国内也很广泛,但流行情况尚不清楚,据以往资料,感染率在0.48～20.3%。我们于1984年上半年在商邱县平台乡杨大楼村进行了初步调查,感染率为7.83%,首次 Giardia lamblia (referred to as Giardia) is a major parasitic in the human gastrointestinal pathogenic protozoa, can cause diarrhea, indigestion and other symptoms. Wolfe found it to be a common cause of traveler’s diarrhea. The disease in many countries in Europe and the United States has become the most common parasitic disease, the infection rate of 7 to 44%. Domestic is also very wide, but the prevalence is not clear, according to past data, the infection rate of 0.48 ~ 20.3%. In the first half of 1984, we conducted a preliminary investigation in Yangdalou Village, Pingtai Township, Shangqiu County with an infection rate of 7.83% for the first time