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美国新生儿单纯疱疹病毒(HSV)感染每年约1/5000～1/7500,主要为HSV-2型,1型占25%～30%。但50%以上患儿之母无生殖道HSV 感染病史或症状,与其性交者也无HSV 感染。生产时无症状排HSV 者约占0.2%～1%。宫内感染(胎盘血行或上行)较少约10%,主要系产时经产道感染.如母为原发性感染,其胎儿被感染的机会为40%～50%,而复发性感染者则仅4%～8%。早产,胎膜早破>4小
The United States HSV infection every year about 1/5000 ~ 1/7500, mainly HSV-2 type, type 1 accounted for 25% to 30%. However, more than 50% of the mothers with no history of reproductive tract HSV infection or symptoms, and no sexual intercourse with HSV infection. Asymptomatic HSV production accounted for about 0.2% to 1%. Intrauterine infection (placental blood or ascending) less about 10%, mainly when the production line by the birth canal infection, such as the mother of primary infection, the chances of their fetus was 40% to 50%, while those with recurrent infections Only 4% ~ 8%. Premature delivery, premature rupture of membranes> 4 small