患儿男,14岁。因高热2天,皮疹1天入院。体检:体温39℃,脉搏90次/min。四肢、躯干可见融合成片的猩红热样疹。眼结膜充血、口唇潮红、口腔粘膜充血,草莓舌。心肺(-)。肝脾未触及。实验室检查:血红蛋白13.5g/L,红细胞4.72×10~9/L,白细胞9.1×10~9/L,中性0.93,淋巴0.7。初诊为猩红热。经青霉素、氨苄青霉素、地塞米松治疗10天,全身脱屑出院。出院后,因体温仍持续在37.5～38℃,颈、耳后淋巴结大而再入院。查血红蛋白10.9g/L,红细胞3.78×10~9/L,白细胞18.6 Children male, 14 years old. 2 days due to fever, rash 1 day admission. Physical examination: body temperature 39 ℃, pulse 90 beats / min. Extremities, torso visible fusion into pieces of scarlet fever rash. Conjunctival hyperemia, lip flush, oral mucosal congestion, strawberry tongue. Cardiopulmonary (-). Liver and spleen not touched. Laboratory tests: hemoglobin 13.5g / L, red blood cells 4.72 × 10 ~ 9 / L, white blood cells 9.1 × 10 ~ 9 / L, neutral 0.93, lymph 0.7. First diagnosed as scarlet fever. After penicillin, ampicillin, dexamethasone treatment for 10 days, body exfoliation discharged. After discharge, due to body temperature continued in the 37.5 ~ 38 ℃, neck, ear and lymph nodes after admission. Check hemoglobin 10.9g / L, red blood cells 3.78 × 10 ~ 9 / L, white blood cells 18.6