1　临床资料患儿 ,女 ,3岁 ,因咳嗽 1周 ,加重伴发热 3ｄ入院。患儿 1周前受凉开始咳嗽 ,呈阵发性干咳无痰 ,无发热、流涕 ,大小便正常。自服交沙霉素好转。 3ｄ前再次受凉 ,咳嗽加重伴发热 ,呈间隙性 ,体温 38 5℃左右。查体 :体温 38℃ ,呼吸 4 5次 /ｍｉｎ ,心率 15 0次 /ｍ 1 clinical data of children, women, 3 years old, due to cough for 1 week, aggravated with fever 3d admission. Children with cold began to cough 1 week ago, was paroxysmal dry cough without sputum, no fever, runny nose, normal urine. Self serving josamycin improved. Cold again before the 3d, cough aggravated with fever, was intermittent, body temperature 385 ℃ or so. Physical examination: body temperature 38 ℃, breathing 4 5 times / min, heart rate 15 0 times / m