患儿,女,4天。第一胎第一产,孕39周顺产。生后3天发现双下肢起红色皮疹,次日即蔓延至躯干及四肢,无发热。生后曾肌注青霉素2天。父母非近亲婚配。其父幼年双下肢及腰部也有类似斑疹,后呈色素斑,青春期自愈。查体: T36.5℃,体重3.2kg,发育正常,反应好,躯干及上下肢满布大小不等玖瑰色风团样皮疹,多数融合成片,疹间可见正常皮肤,胸部散在2～3个黄豆大小结节样皮疹,无水疱及渗出,皮 Children, women, 4 days. The first birth of the first birth, 39 weeks of pregnancy, spontaneous. Three days after birth, the lower limbs were found red rash, the next day that spread to the trunk and limbs, no fever. After giving penicillin twice a day after birth. Parents non-relatives marriage. His father, both lower extremities and waist have similar rash, was pigmented, adolescent self-healing. Physical examination: T36.5 ℃, weight 3.2kg, normal development, good response, torso and upper and lower limb covered with cloth sizes ranging from the same color of the wind-like rash, the majority of integration into films, rash visible normal skin, chest scattered 2 ~ 3 Soy-sized nodular rash, no blisters and exudation, skin