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近十多年来,贾第虫病在欧美许多国家曾多次发生暴发流行。本病主要症状是腹泻,由于在旅游者中发病率高,故又称为“旅游者腹泻”。不少国家的医学、卫生工作者对此十分重视,进行了大量科研工作,并有不少报道,现将近年来这方面的进展综述如下。病原生物学形态:贾第虫早在1681年被发现,其在光学显微镜下的滋养体与包囊形态已有很多描述。自60年代起,应用电镜观察贾第虫的超微结构,进一步了解了其形态与功能的关系。滋养体有4对鞭毛:前侧鞭毛、后侧鞭
In the past decade or more, giardiasis has been outbreaks in many countries in Europe and the United States. The main symptoms of this disease is diarrhea, due to the high incidence of tourists, it is also known as “tourists diarrhea.” Many countries’ medical and health workers attach great importance to this and carry out a large amount of scientific research work. They have also made quite a number of reports. The progress in these fields in recent years is summarized as follows. Pathogenesis: Giardia was first discovered in 1681 and its trophozoites and cysts under light microscopy have been described in many ways. Since 1960s, the electron microscopy was used to observe the ultrastructure of Giardia so as to further understand the relationship between its morphology and function. Trophozoites have 4 pairs of flagella: front flagella, rear whip