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disease caused by infection with Legionella species, such as L. pneumophila.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

Le·gion·naires' dis·ease

an acute infectious disease, caused by Legionella pneumophila, with prodromal influenzalike symptoms and a rapidly rising high fever, followed by severe pneumonia and production of usually nonpurulent sputum, and sometimes mental confusion, hepatic fatty changes, and renal tubular degeneration. It has a high case-fatality rate; acquired from contaminated water, usually by aerosolization rather than being transmitted from person-to-person.
Synonym(s): legionellosis
[American Legion convention, in Philadelphia in 1976, at which many delegates were so affected]
Farlex Partner Medical Dictionary © Farlex 2012


A disease caused by infection with a Legionella bacterium.
Mentioned in: Legionnaires' Disease
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
ANSI/ASHRAE Standard 188-2015, Legionellosis: Risk Managementfor Building Water Systems, is available from the ASHRAE Bookstore (http://tinyurl.com/legionellosis), or it can be read for free online via this page, www.ashrae.
Two cases of legionellosis were reported in Korea in 2001, and less than 10 cases were reported between 2002 and 2005.
By the time the legionellosis was reported for public health investigation, the delivery tub had been drained, disinfected, and placed in storage before being swabbed by the midwifery center.
([section]) The category of illness reported by [greater than or equal to]50% of ill respondents; all legionellosis outbreaks were categorized as ARI.
The New York City (NYC) Health Code requires providers and laboratories to report all cases of legionellosis in city residents to the NYC Department of Health and Mental Hygiene (DOHMH); these reports include positive results for Legionella in cultures, urine antigen tests, direct fluorescent antibody stains, and serologic testing.
pneumophila sg 1 predominated as the causal Legionella strain for laboratory-diagnosed cases of legionellosis in 2008 and 2009 at 27.6% and 32.0%, respectively (Public Health Surveillance, 2008, 2009) (Table 3); additionally, 5.2% and 9.0% of legionellosis cases were due to L.
ASHRAE Guideline 12-2000, Minimizing the Risk of Legionellosis Associated with Building Water Systems, states that, in surveys of spas, Legionella has been found only when disinfectant levels were not maintained adequately.
Few cases of neonatal legionellosis have been reported in the literature (3-3).
Thirty-three cases of legionellosis have been described in patients receiving infliximab, adalimumab, or etanercept for rheumatoid arthritis, inflammatory bowel disease, psoriasis, or other inflammatory conditions (3-5).
NNDSS data for 2000-2009 were used to describe legionellosis case demographics, assess seasonal patterns of legionellosis infection, and, using denominators from the 2000 U.S.
pneumophila SG 11 cannot be detected by Legionella urinary antigen or serologic tests, the assays most frequently used to diagnose legionellosis (7-9).