Serological Cross-Reaction between Legionella pneumophila and Citrobacter freundii in Indirect Immunofluorescence and Rapid Microagglutination Tests

AUTOR(ES)

Gray, J. J.

RESUMO

We describe the first case in which a diagnostic rise in titers of antibody to formalinized Legionella pneumophila serogroup 1 yolk sac antigen was shown to be caused by a cross-reaction between L. pneumophila and another organism, Citrobacter freundii.

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