艰难梭菌在肠道内无症状定居多出现于生后一年内。以往关于婴儿无症状带菌率的报告不一1致。有的报告表明带菌率随年龄增长而升高:不足一个月的新生儿中带菌率为0～29%,1～2岁较大婴儿带菌率为4～46%。另一些报告结果则相反,即1～2岁较大婴儿带菌率低于4%。虽然婴儿肠道中艰难梭菌一般是无害的,但是,流行病学资 Clostridium difficile in the intestine asymptomatic settlements appear in more than one year after birth. Previous reports on the incidence of asymptomatic babies have varied. Some reports indicate that the incidence of infection increases with age: the incidence of newborns in less than one month is 0 to 29%, and the prevalence of 4 to 46% in large infants aged 1 to 2 years. Other reports, on the other hand, have the opposite result, ie less than 4% of 1 to 2 year old babies. Although C. difficile in the infant intestine is generally not harmful, however, epidemiological data are available