机会感染是医院内感染的一种少见类型 ,随着抗生素、激素及免疫抑制剂的广泛应用 ,一些原发病导致免疫功能低下的患者发生机会感染的情况日渐增多。我们发现马棒状杆菌感染一例 ,现报道如下。患者 ,男性 ,5 3岁。因反复咳嗽、咳痰、喘 2 0余年 ,加重伴心悸、气短 10ｄ天入院。 Opportunistic infection is a rare type of nosocomial infection. With the widespread use of antibiotics, hormones and immunosuppressive agents, opportunistic infections are frequently reported in some patients with primary disease leading to immunocompromised patients. We found a case of horses coryneform bacteria infection, are reported below. Patient, male, 53 years old. Due to repeated cough, expectoration, asthma 20 years, increased with palpitations, shortness of breath 10d admission.