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1981年10月份,美国衣阿华州大学医院的病人中发生了24例军团病,受感染者大多为免疫妥协患者且11例死亡。爆发前不久,21名病人住进新近完成的医院增设建筑;16名病人住进一个新的血液学——肿瘤学单位。在从病人获取的全部临床分离物以及14个污水出口中的7个、9份热水标本中的6份,新增建筑物的14个淋浴喷头中的1个鉴定出血清学1群嗜肺性军团病杆菌。虽然水系统明显地受到军团病杆菌污染,但实验室检验结果表明,水各项指标并未超出目前规定的水质标准范围。血液学—肿瘤学单位住院病人用水受到限制时,控制
In October 1981, there were 24 cases of Legionnaires’ disease among patients at the University Hospital of Iowa, United States, most of whom were immunocompromised and 11 died. Shortly before the outbreak, 21 patients were admitted to the newly completed hospital extension; 16 patients were admitted to a new hematology-oncology unit. One out of 14 shower heads of all clinical isolates and 14 out of 14 sewer outlets obtained from the patient, 6 out of 9 hot water samples, and new buildings identified seronegative Legionella Bacillus. Although the water system was significantly contaminated with Legionella, the laboratory test results showed that the water indicators did not exceed the current water quality standards. Hematology - Oncology Unit Inpatients Controlled when water usage is limited