目前对小儿军团病(LD)的认识还不足。本文作者报道了在1年中发现的3例嗜肺军团杆菌(Lp)肺炎患儿,检测了免疫功能及其他发病因素,并进行了流行病学调查。病例1:男,18月龄,既往体健。由于吸入丁香油后呼吸心跳停止,在当地医院急诊作气管插管和心肺复苏后,转入儿童医院。入院时胸片示两侧弥漫性肺纹理增多,右肺门周围和左下肺密度增高。入院后使用呼吸器36小时,拔管后患儿发生了持续性喉喘鸣,即予地塞米松(每日2mg/kg,静注),并重新插管,最后切开气管。病程第3周,患儿仍在接受地塞米松治疗,此时出现发热、气急和两肺罗音。自细胞计数为1200 At present, awareness of Pediatric Legionnaires’ Disease (LD) is not enough. The authors reported three children with Legionella pneumophila (Lp) pneumonia found in one year, tested for immune function and other risk factors, and conducted epidemiological investigations. Case 1: Male, 18 months old, previously healthy. Due to inhalation of clove oil after breathing stopped, in the local hospital for emergency tracheal intubation and cardiopulmonary resuscitation, transferred to Children’s Hospital. On admission, the chest radiograph showed increased diffuse lung markings on both sides, and increased density around the right hilum and lower left lung. After admission, the respirator was used for 36 hours. Persistent laryngolaryngology occurred in children after extubation, ie dexamethasone (2 mg / kg daily, intravenous injection), re-intubation and finally tracheal incision. The third week of course, children are still receiving dexamethasone treatment, this time fever, shortness of breath and two lung rales. Since the cell count is 1200