沙雷菌为肠内杆菌科的一属,系需氧性固紫阴性短小杆菌。其特征为产生红色色素。它在自然界分布较广,并可自人体分离。长期以来,人们认为该菌无致病性。但Woodward首先报告了该菌可引起呼吸道感染。后来又有引起人体多种感染的报告,如创伤感染、肺炎、肺化脓症、脓胸、脊髓膜炎、尿 Serratia enterobacteriaceae is a genus, Department of aerobic solid purple-negative short bacillus. It is characterized by the production of red pigment. It is widely distributed in nature and can be isolated from the human body. For a long time, people think that the bacteria is non-pathogenic. But Woodward first reported that the bacteria can cause respiratory infections. Later, there have been a number of reports of human infection, such as traumatic infections, pneumonia, pulmonary empyema, empyema, spinal meningitis, urine