患儿男,出生后7d因反复发热3d入院,体温最高39.3℃,无抽搐、尖叫,以“败血症可能”收住。入院后查体:体温38.5℃,全身轻度黄染,前囟张力不高,双肺少许干、湿啰音,心率齐,未闻及杂音。腹部稍膨,腹软,肝右肋下两指可及,肠鸣音正常。四肢关节无异常、未见皮疹及出血点。血常规:白细胞37.4×10~9/L,其中中性77%,淋巴20%,并检出中毒颗粒,红细胞5.15×10~12/L。血培养:检出铜绿假单胞菌,对青霉素及头孢类抗生敏感,入院当日腰穿因穿刺 Children male, 7d after birth due to repeated fever admitted to the hospital for 3 days, the highest temperature 39.3 ℃, no convulsions, screaming, “septicemia may” receive. After admission, physical examination: body temperature 38.5 ℃, systemic mild yellow dye, anterior fontanel tension is not high, a little dry lungs, wet rales, heart rate Qi, no smell and noise. Abdomen slightly swollen, abdominal soft, right ribs under the liver can be two fingers, bowel sounds normal. No abnormal limbs and joints, no rash and bleeding points. Blood: WBC 37.4 × 10 ~ 9 / L, of which 77% neutral, lymphatic 20%, and poisoning particles were detected, red blood cells 5.15 × 10 ~ 12 / L. Blood culture: Pseudomonas aeruginosa was detected, sensitive to penicillin and cephalosporin, on the day of admission lumbar puncture due to puncture