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Journal of Clinical Microbiology, Apr 1997, 954-956, Vol 35, No. 4
Copyright © 1997 by the American Society for Microbiology. All rights reserved.

Rapid diagnosis of Legionella pneumophila serogroup 1 infection with the Binax enzyme immunoassay urinary antigen test

D Kazandjian, R Chiew and GL Gilbert
Department of Clinical Microbiology, Westmead Hospital, Sydney, New South Wales, Australia.

The Binax legionella urinary antigen (LUA) enzyme immunoassay (Binax, Portland, Maine) was evaluated in 159 patients with suspected or proven legionellosis and 209 controls. A positive LUA test was found in 37% of patients with suspected legionellosis overall and in 83% of those with proven Legionella pneumophila serogroup 1 infection. The sensitivity of the LUA test was significantly greater than that of the direct fluorescent-antigen test (83 versus 42%; P < 0.0001) but not significantly different from that of culture (85%) or serology (91%); specificity was at least 99.5%.

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