病例摘要患儿男,3岁4个月,因“反复发热、咳嗽18d”入院。咳嗽轻,无痰,发热呈中低热,最高38·5℃,无寒颤,无抽搐,无大汗淋漓,无呕吐腹泻,无皮疹及皮肤出血点,亦无关节疼痛及骨痛,不伴尿频、尿急、尿痛,精神、食欲欠佳,活动尚可,在家一直口服抗生素效果不显著。入院时查体:体温3 Case summary Children with male, 3 years old 4 months, because of “repeated fever, cough 18d” admission. Cough, no phlegm, fever was moderate fever, the highest 38.5 ℃, no chills, no convulsions, no sweating, no vomiting diarrhea, no rash and skin bleeding, nor joint pain and bone pain, without frequent urination , Urgency, dysuria, mental, poor appetite, activity is acceptable, the effect of oral antibiotics at home is not significant. Physical examination at admission: body temperature 3