正常人具有防御和抗感染的能力,羊水也有这种特殊功能,羊水是保护胎儿免受感染的最后一道防御屏障。羊水感染可波及胎儿新生儿和母体感染,甚至可发生败血症。自1949年Cattaneo 首次提出羊水中抗菌物质与羊水感染间协调关系。近10余年来人们发现羊水对变形杆菌、化脓性链球菌及白色念珠菌均有抗菌作用。加藤俊发现羊水对金黄色葡萄球菌、大肠杆菌 Normal people have the ability to defensive and anti-infection, amniotic fluid also has this special feature, amniotic fluid is to protect the fetus from infection last defensive barrier. Amniotic fluid infection can affect fetal newborn and maternal infection, and even sepsis can occur. Cattaneo first proposed in 1949 the amniotic fluid antimicrobial substances and amniotic fluid infection between the coordination. In the past 10 years, people have found that amniotic fluid has antibacterial effect on Proteus, Streptococcus pyogenes and Candida albicans. Kato Jun found amniotic fluid against Staphylococcus aureus, Escherichia coli