Pontiac fever at a sewage treatment plant in the food industry
Pontiac fever at a sewage treatment plant in the food industry
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DOI：
10.5271/sjweh.437
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发表时间：
1999-06-01
影响因子：
6.3
通讯作者：
Madsen, H
中科院分区：
文献类型：
--
作者：
Gregersen, P;Grunnet, K;Madsen, H
背景和目的在炎热潮湿的夏季，工人们在污水处理厂修理用于污泥浓缩的滗析器后出现发烧和流感样症状。这项工作在一个封闭的小房间里进行了10天，同时另一个滗析器正在运行，因此向环境中排放气溶胶，工人们暴露在其中。本研究的目的是确定这一爆发的发热性疾病的原因，使额外的情况下，可以prevent.Methods所有5例患者都看到，并在职业医学科检查。此外，有2名工人反复患病，在住院期间接受了检查。由于怀疑有庞蒂亚克热（非肺炎性军团菌病），在血液样本中测定了军团菌抗体。结果与结论5例患者的临床表现与庞蒂亚克热一致，血清中嗜肺军团菌血清1型抗体均为阳性。从滗析器的污泥中培养出大量嗜肺军团菌血清群1。由此得出结论，发热是由无盖醒酒器散发到环境中的嗜肺军团菌引起的。制定了预防新病例的程序。
Background and objectives During a hot and humid summer period workers became ill with fever and flu-like symptoms after repairing a decanter for sludge concentration at a sewage treatment plant. The work took place over a period of 10 days in a small closed room, while another decanter was in operation and was consequently emitting aerosol to the environment, to which the workers were exposed. The aim of this study was to determine the cause of this outbreak of febrile illness so that additional cases could be prevented.Methods All 5 patients were seen and examined in the Department of Occupational Medicine. Furthermore 2 of the workers had recurrent illness and were examined during hospitalization. As Pontiac fever (nonpneumonic legionellosis) was suspected, antibodies to legionellae were measured in blood samples. After positive antibody titers to Legionella pneumophila were found, samples of the sludge were collected for legionellae culture.Results and conclusions The clinical picture agreeed with that described for Pontiac fever, and positive antibody titers to L pneumophila serogroup 1 were found in blood from all 5 patients. L pneumophila serogroup 1 was cultured in high amounts from sludge from the decanter. It was concluded that the fever was caused by L pneumophila emitted to the environment by the uncovered decanter. Procedures for preventing new cases were established.