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. 1984 Sep;20(3):478–482. doi: 10.1128/jcm.20.3.478-482.1984

Detection of soluble Legionella pneumophila antigens in serum and urine specimens by enzyme-linked immunosorbent assay with monoclonal and polyclonal antibodies.

W F Bibb, P M Arnow, L Thacker, R M McKinney
PMCID: PMC271354  PMID: 6490831

Abstract

Urine and serum specimens from three patients with pneumonia caused by Legionella pneumophila serogroup 1 (Lp1) were tested by enzyme-linked immunosorbent assay (ELISA) for Lp1-soluble antigen. A three-layer direct ELISA with polyclonal antibodies and a four-layer indirect ELISA with both polyclonal and monoclonal antibodies were used. Lp1 antigen was detected in both urine and serum from the three patients. As determined by ELISA, the concentration of antigen was 30- to 100-fold less in serum than in urine collected on the same day. In some instances the indirect ELISA was more sensitive than the direct ELISA, but in others it was less sensitive, depending on the monoclonal antibody used. The subgroup of the infecting Lp1 organism was determined based on antigenic determinants expressed in the urine. This study illustrates the use of serum as well as urine as an antigen reservoir in the laboratory diagnosis of legionellosis by ELISA and the potential for developing more sensitive antigen detection systems by the judicious use of monoclonal antibodies.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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