院内感染に関する臨床的研究 : 第1報 Pseudomonas aeruginosa感染症の疫学的検討

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In our clinic, 311 patients were found to be infected with Ps. aerug. and the total number of strains detected from them were 493, during a five year period from Jan. 1971 to Dec. 1974. An epidemiological survey of them is documented here, considering the problems of environmental contamination. The procedures used for epidemiological tracing of Ps. aerug. were serotyping and antibiotic susceptibility (antibiogram). The results were as follows: 1. Infections due to Ps. aerug. were seen in 14% of hospitalized patients and 0.7 of out-patients. 2. The main infected region with Ps. aerug. was the urinary tract which encompassed 90.3% of these 311 cases, and the others were infected postoperative wound, urethral smear, blood, pleural effusion, and ascites. 3. Incidence of Ps. aerug.. Incidence of the infection fluctuates antiphase with humidity, that is, the fewest incidence in April when humidity is lowest and the highest incidence in summer when temperature and humidity are high. In addition, Ps. aerug. infection had some inclination to occur more frequently in wards in the hospital which have changing nursing teams. These findings revealed an epidemic outbreak of Ps. aerug. infections in a limited area in the hospital. 4. 37.5 of the environmental samples taken from many areas in hospital, were positive in Ps. aerug. cultures. This suggested that the environment in hospital was widely contaminated with Ps. aerug..
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院内感染に関する臨床的研究 : 第1報 Pseudomonas aeruginosa感染症の疫学的検討

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