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. 1988 May;26(5):1016–1023. doi: 10.1128/jcm.26.5.1016-1023.1988

Common epitope on the lipopolysaccharide of Legionella pneumophila recognized by a monoclonal antibody.

C Barthe 1, J R Joly 1, D Ramsay 1, M Boissinot 1, N Benhamou 1
PMCID: PMC266507  PMID: 2454935

Abstract

Serogroup-specificity of Legionella pneumophila is related to lipopolysaccharide (LPS), and few cross-reactions between serogroups have been observed with rabbit or monkey antisera. C57BL/6 mice were sequentially immunized with crude outer membrane fractions of L. pneumophila serogroups 1, 5, and 7, Legionella bozemanii, and Legionella micdadei. Spleen cells from these mice were then fused with the Sp2-0/Ag14 mouse myeloma cell line. Outer membrane-rich fractions and LPS were prepared from L. pneumophila serogroups 1 to 8 and other Legionella and non-Legionella species. Immunoblots of these extracts were performed with monoclonal antibody obtained from these fusions. One of these monoclonal antibodies recognized an epitope common to all tested serogroups of L. pneumophila and attached to the major constituent of the outer membrane, LPS. This antibody did not react with other Legionella species and numerous gram-negative rods other than Pseudomonas fluorescens CDC93. This monoclonal antibody may be useful in preliminary identification of L. pneumophila as an alternative to direct fluorescent-antibody testing.

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Selected References

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