患儿,男,34天,孕1产1,足月顺产,Ap-gar评分1分钟4分,5分钟6分。出生体重4200g。入院时日龄16天,因全身皮疹5天,发热3天入院。生后第11天起发现颜面部、　臀部散在芝麻大小暗红色皮疹,发热不规则,　最高达39.8℃。入院查体:神志清,反应好,　无浅表淋巴结肿大,全身皮疹呈斑丘疹,疹间　皮肤正常,有互相融合趋势,无脱屑及溃烂,　压之褪色很快复原。心肺查体无异常。肝肋　下3.5cm可及,脾肋下2.5cm可及。实验室　检查:血象白细胞12.5×109/L,最高达32×109/L,其中淋巴细胞计数最高达13.9×109/L,血红蛋白139g/L,最低降至124g/L,血小板180×109/L,最低至73×109/L,肝功能受 Children, male, 34 days, 1 pregnancy 1, term full-term, Ap-gar score 1 minute 4 minutes, 5 minutes 6 minutes. Birth weight 4200g. Admission at the age of 16 days, due to systemic rash 5 days, 3 days admitted to hospital fever. After the first 11 days of life, he found facial, buttocks scattered in the sesame size dark red rash, fever irregular, up to 39.8 ℃. Admission examination: Consciousness, good response, no superficial lymph nodes, systemic rash rash, rash skin normal, there is a tendency of mutual integration, no scaling and ulceration, the pressure of fading quickly recover. Cardiopulmonary examination was normal. 3.5cm under the liver ribs can be accessed, 2.5cm under the spleen ribs can be accessed. Laboratory tests: blood leukocyte 12.5 × 109 / L, up to 32 × 109 / L, lymphocyte count up to 13.9 × 109 / L, hemoglobin 139g / L, the lowest dropped to 124g / L, platelet 180 × 109 / L , The lowest to 73 × 109 / L, liver function by