奴卡氏菌较为少见。感染往往发生于使用免疫抑制剂、皮质类激素、机体抵抗力低下或原有肺部疾病的患者。健康人较少罹病。本病无特殊症状,易致误诊而延迟治疗。兹报告我们遇到的5例,并着重X线表现加以分析。 1 病例报告 Nocardia relatively rare. Infection often occurs in patients who use immunosuppressive agents, corticosteroids, low body resistance, or existing lung disease. Healthy people less sick. No special symptoms of this disease, easy to cause misdiagnosis and delay treatment. We report the five cases we encountered and focus on X-ray findings. 1 case report