随着广谱抗生素、激素及免疫抑制剂的广泛应用 ,病原微生物在不断的变化 ,了解引起医院感染的流行菌株为临床提供病原学诊断依据 ,合理使用抗生素 ,具有重要意义。某医院 1996年 7月～ 1997年 7月各病房送检标本中 ,共分离出病原菌 1146株 ,统计分析如下 :1　资料与方法1.1　标 With the widespread use of broad-spectrum antibiotics, hormones and immunosuppressive agents, the continuous changes of pathogenic microorganisms and the understanding of the epidemic strains causing nosocomial infections provide the basis for etiological diagnosis for clinical diagnosis, and the rational use of antibiotics is of great significance. A hospital in July 1996 ~ July 1997 each ward inspection specimens, a total of 1146 isolates were isolated pathogens, statistical analysis is as follows: 1 Materials and Methods 1.1 standard