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自１９９０年１月至１９９４年５月，对５１５０份临床标本进行了细菌培养鉴定，共分离出致病菌１６８２株。其中铜绿假单胞菌２９３株，超过金黄色葡萄球菌、大肠埃希氏菌、鼠伤寒沙门氏菌而居首住，占致病菌的１１．５％，而且该菌检出率有逐年递增的趋势，耐药菌逐年增多。另外对部分典型病例进行了追踪调查，结果表明机体抵抗力减弱、免疫力低下者为易感人群，空气、吸痰器、雾化器、吸氧、气管切开等为重要传染源和传播途径，潮湿为细菌繁殖的必要条件。并提出了降低院内感染的措施。
From January 1990 to May 1994, 5150 clinical specimens were identified by bacterial culture, and 1682 pathogenic bacteria were isolated. Among them, 293 strains of Pseudomonas aeruginosa surpassed Staphylococcus aureus, Escherichia coli and Salmonella typhimurium, occupying 11.5% of the pathogenic bacteria, and the detection rate of the bacteria tended to increase year by year , Drug-resistant bacteria increased year by year. In addition, some typical cases were followed up, the results showed that the body weakened immunity, immunocompromised were susceptible populations, air, sputum aspirator, nebulizer, oxygen, tracheostomy as an important source of infection and transmission Humidity is a necessary condition for bacterial growth. And put forward to reduce the nosocomial infection measures.