６３９例小儿腹泻原虫感染调查孙卓启王建国１９９２～１９９５年５～１０月，对住我院治疗的６３９例小儿腹泻患者进行了原虫感染调查。１．对象与方法：４年内住院治疗的小儿腹泻患者均为调查对象（腹泻组），平均年龄６．５岁（１～１４岁），男３１１例，女３２８例。... Investigation of 639 Cases of Pediatric Diarrhea Protozoa Infection Sun Zhuoqi Wang Jianguo From May 1992 to May 1995, 639 cases of infantile diarrhea in our hospital were investigated for protozoal infection. 1. PARTICIPANTS AND METHODS: All children with diarrhea who were hospitalized within 4 years were investigated (diarrhea group) with an average age of 6.5 years (range, 1 to 14 years). There were 311 males and 328 females. ...