谈及微生物,大家可能会认为它与疾病密切相关,其实这种看法是很不确切,至少可以说是不全面的,有时甚至是错误的.有些外来菌,如伤寒杆菌、痢疾杆菌等确实可以使人染病;然而,长期生长在人体皮肤、粘膜上的常住菌却是人类的好朋友,这是因为它为人体构筑了第一道安全的防线,是人体的微生物“保护膜”.在人身上,常住菌最多的地方是大肠.一个新生儿肠内基本上是无菌的,不过,几个小时之后,细菌便开始产生和出现了.如果用显微镜对肠粘膜进行 When it comes to microorganisms, we may think that it is closely related to the disease. In fact, this view is very imprecise, at least not comprehensive and sometimes even wrong. Some foreign bacteria such as Salmonella typhi, Shigella dysenteriae, etc. can indeed However, long-term growth in the human skin, mucous membrane of the resident bacteria is a good friend of mankind, because it builds the body for the first safe line of defense, is the body’s micro-organisms “protective film ”. In humans, the most common place of colonization is the large intestine. A neonatal intestine is essentially sterile, but bacteria begin to develop and appear in a few hours. If the intestinal mucosa is examined with a microscope