1.临床资料 患儿男,6岁,因发热、咳嗽、纳差3天。X线胸透,双肺纹理增强,化验血白细胞分类均正常。尿常规正常,诊断为:支气管炎,给于0.9％氯化钠250毫升加氨苄青霉素3.0克(皮试阴性),静滴,每天1次,共7天,治愈出院。 出院后第4天,患儿出现全身皮肤瘙痒,弥漫性潮红,伴有乏力。体检:体温37℃,一般情况较好,眼睑、 1. Clinical data Children, 6 years old, due to fever, cough, anorexia for 3 days. X-ray thoracentesis, enhanced lungs, laboratory white blood cell classification were normal. Urine routine normal, diagnosed as: bronchitis, 250 ml 0.9% sodium chloride plus ampicillin 3.0 grams (skin test negative), intravenous infusion, once daily for 7 days, cured and discharged. On the fourth day after discharge, the patient developed systemic pruritus, diffuse flushing and fatigue. Physical examination: body temperature 37 ℃, the general situation is better, eyelids,