目的:了解杭州市余杭地区婴幼儿A组轮状病毒感染的流行病学特征。方法:回顾分析2006年3月～2010年2月,门诊和住院11岁以下腹泻患儿8 781例粪便标本A组轮状病毒抗原检测资料,检测方法是采用胶体金免疫层析技术和双抗体夹心原理检测粪便中A组轮状病毒抗原。结果:8 781例腹泻婴幼儿中,检出A组轮状病毒抗原阳性1 039份,阳性率11.83%,发病时间以每年的10、11、12和1月份为检出高峰,患儿年龄以2岁以下的婴儿为主。结论:A组轮状病毒是该地区婴幼儿腹泻的主要病原之一,以2岁以下的婴儿为主;流行季节明显,以秋末至春初为高峰期。 Objective: To understand the epidemiological characteristics of rotavirus A infection in infants and young children in Yuhang, Hangzhou. Methods: The data of group A rotavirus antigen in 8 781 cases of children with diarrhea under 11 years of age from March 2006 to February 2010 were retrospectively analyzed. The detection methods were colloidal gold immunochromatography and double antibody Sandwich principle detection of feces in group A rotavirus antigen. Results: Of 8 781 diarrhea infants, 1039 were positive for group A rotavirus antigen, the positive rate was 11.83%. The onset time was peaked at 10, 11, 12 and January each year, and the age of children Babies under 2 years old. Conclusion: Group A rotavirus is one of the most important pathogens of infant diarrhea in the region. The majority of babies under 2 years of age are predominant. The epidemic season is obvious with a peak from late autumn to early spring.