1.Benin, AL, Benson, RF, Besser, RE. Trends in legionnaires disease, 1980-1998: declining mortality and new patterns of diagnosis. Clin Infect Dis 2002;35:1039–1046.
2.Butler, JC, Fields, BS, Breiman, RF. Prevention and control of legionellosis. Infect Dis Clin Pract 1997;6:458–464.
3.Joseph, C. Surveillance of legionnaires disease in Europe. In: Marrie, R, ed. Legionella. Washington, DC: American Society for Microbiology; 2002:311–317.
4.Squier, CL, Stout, JE, Krystofiak, S, et al.A proactive approach to prevention of healthcare-acquired legionnaires disease: the Allegheny County (Pittsburgh) experience. Am J Infect Control 2005;33:360–367.
5.Allegheny County Health Department. Approaches to Prevention and Control of Legionella Infection in Allegheny County Health Care Facilities. 2nd ed. Pittsburgh, PA: Allegheny County Health Department; 1997:1–15. Available at: http://www.legionella.org. Accessed June 1, 2007.
6.Centers for Disease Control and Prevention. Guidelines for preventing health-care-associated pneumonia, 2003. MMWR Morb Mortal Wkly Rep 2004;53(RR-3):1–36.
7.Yu, VL. Resolving the controversy on environmental cultures for Legionella. Infect Control Hosp Epidemiol 1998;19:893–897.
8.O'Neill, E, Humphreys, H. Surveillance of hospital water and primary prevention of nosocomial legionellosis: what is the evidence? J Hosp Infect 2005;59:273–279.
9.Ruef, C. Nosocomial legionnaires disease—strategies for prevention. J Microbiol Methods 1998;33:81–91.
10.Stout, JE, Rihs, JD, Yu, VL. Legionella. In: Murray, PR, Baron, EJ, Jorgensen, JH, Pfaller, MA, Yolken, RH, eds. Manual of Clinical Microbiology. Washington, DC: ASM Press; 2003:809–823.
11.Drenning, SD, Stout, JE, Joly, JR, Yu, VL. Unexpected similarity of pulsed-field gel electrophoresis patterns of unrelated clinical isolates of Legionella pneumophila, serogroup 1. J Infect Dis 2001;183:628–632.
12.Kool, JL, Bergmire-Sweat, D, Butler, JC, et al.Hospital characteristics associated with colonization of water systems by Legionella and risk of nosocomial legionnaires disease: a cohort study of 15 hospitals. Infect Control Hosp Epidemiol 1999;20:798–805.
13.Best, M, Yu, VL, Stout, J, Goetz, A, Muder, RR, Taylor, F. Legionellaceae in the hospital water supply—epidemiological link with disease and evaluation of a method of control of nosocomial legionnaires disease and Pittsburgh pneumonia. Lancet 1983;2:307–310.
14.Sabria, M, Modol, JM, Garcia-Nunez, M, et al.Environmental cultures and hospital-acquired legionnaires disease: a 5-year prospective study in 20 hospitals in Catalonia, Spain. Infect Control Hosp Epidemiol 2004;25:1072–1076.
15.Boccia, S, Laurenti, P, Borella, P, et al.Prospective 3-year surveillance for nosocomial and environmental legionella: implications for infection control. Infect Control Hosp Epidemiol 2006;27:459–465.
16.Formica, N, Yates, M, Beers, M, et al.The impact of diagnosis by Legionella urinary antigen test on the epidemiology and outcomes of legionnaires disease. Epidemiol Infect 2001;127:275–280.
17.Fields, BS, Benson, RF, Besser, RE. Legionella and legionnaires disease: 25 years of investigation. Clin Microbiol Rev 2002;15:506–526.
18.Helbig, JH, Bernander, S, Castellani-Pastoris, M, et al.Pan-European study on culture-proven legionnaires disease distribution of Legionella pneumophila serogroups and monoclonal subgroups. Eur J Clin Microbiol Infect Dis 2002;21:710–716.
19.Yu, VL, Plouffe, JF, Castellani-Pastoris, M, et al.Distribution of Legionella species and serogroups isolated by culture in consecutive patients with community acquired pneumonia: an international collaborative survey. J Infect Dis 2002;186:127–128.
20.Doleans, A, Aureli, H, Reyrolle, M, et al.Clinical and environmental distributions of Legionella strains in France are different. J Clin Microbiol 2004;42:458–460.
21.Chang, FY, lacobs, SL, Colodny, SM, Stout, JE, Yu, VL. Nosocomial legionnaires disease caused by Legionella pneumophila serogroup 5: laboratory and epidemiological implications. J Infect Dis 1996;174:1116–1119.
22.Muder, RR, Yu, VL. Infection due to Legionella species other than L. pneumophila. Clin Infect Dis 2002;35:990–998.
23.Centers for Disease Control and Prevention. Guidelines for prevention of nosocomial pneumonia. MMWR Morb Mortal Wkly Rep 1997;46:31–34.
24.Fiore, AE, Butler, JC, Emori, TG, Gaynes, RP. A survey of methods to detect nosocomial legionellosis among participants in the National Nosocomial Infectious Surveillance System. Infect Control Hosp Epidemiol 1999;20:412–416.
25.Lin, YE, Vidic, RD, Stout, JE, Yu, VL. Legionella in water distribution systems. J Am Water Works Assoc 1998;90:112–121.
26.Butler, JC, Fields, BS, Breiman, RF. Issues in the control of nosocomial legionellosis. Infect Dis Clin Pract 1997;7:117–118.
27.Muder, RR, Yu, VL, McClure, J, Kominos, S. Nosocomial legionnaires disease uncovered in a prospective pneumonia study: implications for underdiagnosis. JAMA 1983;249:3184–3188.
28.Yu, VL, Beam, TR, Lumish, RM, et al.Routine culturing for Legionella in the hospital environment may be a good idea: a three-hospital prospective study. Am J Med Sci 1987;294:97–99.
29.Joly, J, Alary, M. Occurrence of nosocomial legionnaires disease in hospitals with contaminated potable water supply. In: Barbaree, JD, Breiman, RF, Dufour, AP, eds. Legionella: Current Status and Emerging Perspectives. Washington, DC: American Society for Microbiology; 1993:39–40.
30.Rudin, J, Wing, E. Prospective study of pneumonia: unexpected incidence of legionellosis. South Med J 1986;79:417–419.
31.Goetz, AM, Stout, JE, Jacobs, SL, et al.Nosocomial legionnaires disease discovered in community hospitals following cultures of the water system: seek and ye shall find. Am J Infect Control 1998;26:6–11.
32.Johnson, JT, Yu, VL, Best, M, et al.Nosocomial legionellosis uncovered in surgical patients with head and neck cancer: implications for epidemiologic reservoir and mode of transmission. Lancet 1985;2:298–300.
33.Plouffe, JR, Para, MF, Maher, WE, Hackman, B, Webster, L. Subtypes of Legionella pneumophila serogroup 1 associated with different atack rates. Lancet 1983;2:649–650.
34.Dournon, E, Bibb, WF, Rajagopalan, P, et al.Monoclonal antibody reactivity as a virulence marker for Legionella pneumophila serogroup 1 strains. J Infect Dis 1988;157:496–501.
35.Kool, JL, Carpenter, JC, Fields, BS. Effect of monochloramine disinfection of municipal drinking water on risk of nosocomial legionnaires' disease. Lancet 1999;35:272–277.
36.Heffelfinger, JD, Kool, JL, Fridkin, S, et al.Risk of hospital-acquired legionnaires disease in cities using monochloramine versus other water disinfectants. Infect Control Hosp Epidemiol 2003;24:569–574.