本文对46例厌氧菌感染的临床特点进行了分析。病例中败血症、原发性腹膜炎各19例,肝脏肿8例。厌氮菌培养阳性63株,其频数依次为脆弱类杆菌(39.7％)、消化球菌、真杆菌、产黑色素类杆菌等。46例中细菌混合感染占45.65％,均为多种细菌反复感染或同时感染。厌氧菌感染多系继发性的内源性感染,为医院内感染重要病原菌之一。 In this paper, the clinical features of 46 cases of anaerobic infections were analyzed. In the case of sepsis, 19 cases of primary peritonitis, liver enlargement in 8 cases. Anaerobic bacteria culture positive 63 strains, followed by the frequency of Bacteroides fragilis (39.7%), peptococcus, eubacteria, melanobacteria and so on. 46 cases of mixed bacterial infections accounted for 45.65%, are a variety of bacteria repeatedly infected or infected at the same time. Anaerobic infections are mostly secondary to endogenous infections and are one of the most important pathogens in the hospital.