二级预防
采取呼吸道卫生防护措施，比如建议咳嗽的患者使用手部清洁用品以及面巾纸，以减少传播的风险。
如果已诊断嗜肺军团菌感染，一般需要进行流行病学调查（由当地感染控制小组或官方流行病学调查组进行），以预防进一步暴露和感染，[29]Cunha BA, Burillo A, Bouza E. Legionnaires' disease. Lancet. 2016 Jan 23;387(10016):376-85. http://www.ncbi.nlm.nih.gov/pubmed/26231463?tool=bestpractice.com [100]Mentasti M, Afshar B, Collins S, et al. Rapid investigation of cases and clusters of legionnaires' disease in England and Wales using direct molecular typing. J Med Microbiol. 2016 Jun;65(6):484-93. https://www.microbiologyresearch.org/content/journal/jmm/10.1099/jmm.0.000257#tab2 http://www.ncbi.nlm.nih.gov/pubmed/27046155?tool=bestpractice.com [101]Bartley PB, Ben Zakour NL, Stanton-Cook M, et al. Hospital-wide eradication of a nosocomial Legionella pneumophila serogroup 1 outbreak. Clin Infect Dis. 2016 Feb 1;62(3):273-9. https://academic.oup.com/cid/article/62/3/273/2462787 http://www.ncbi.nlm.nih.gov/pubmed/26462745?tool=bestpractice.com 以及改善水源中军团菌消毒措施。[102]Demirjian A, Lucas CE, Garrison LE, et al. The importance of clinical surveillance in detecting legionnaires' disease outbreaks: a large outbreak in a hospital with a Legionella disinfection system-Pennsylvania, 2011-2012. Clin Infect Dis. 2015 Jun 1;60(11):1596-602. https://academic.oup.com/cid/article/60/11/1596/356183 http://www.ncbi.nlm.nih.gov/pubmed/25722201?tool=bestpractice.com
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