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. 1988 Oct;26(10):2059–2063. doi: 10.1128/jcm.26.10.2059-2063.1988

Immunologic diversity among serogroup 1 Legionella pneumophila urinary antigens demonstrated by monoclonal antibody enzyme-linked immunosorbent assays.

R B Kohler 1, C Wilde 3rd 1, W Johnson 1, J Joly 1, L J Wheat 1, R Baker 1, M Misfeldt 1
PMCID: PMC266816  PMID: 2460492

Abstract

We tested urine specimens from 222 patients with serogroup 1 Legionella pneumophila pneumonia in two enzyme-linked immunosorbent assays (ELISAs) which used different monoclonal antibodies (A and B) as detector antibodies. Of 171 specimens which contained enough antigen to be detected in the ELISAs, 169 reacted in only one of the two assays. A total of 25 patients whose infections were acquired in any of three Indianapolis hospitals excreted antigen reactive with monoclonal antibody B, but 18 patients who were treated for infections acquired elsewhere reacted with monoclonal antibody A. The urinary antigen ELISA reactivity patterns correlated with the reactivity patterns of L. pneumophila isolates when a separate panel of seven monoclonal antibodies was used. The isolate patterns, in turn, correlated well with environmental isolate patterns from two of the hospitals with nosocomial cases. We conclude that at least two different epitopes exist on the antigen molecules in urine from patients with serogroup 1 L. pneumophila pneumonia and that the subtyping of urinary antigens can be useful epidemiologically.

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Selected References

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