Factors influencing the reactivity of Legionella antigens in immunofluorescence tests.

Abstract:

:We examined several factors for their effects on the serological reactivity of Legionella antigens used for direct or indirect fluorescent-antibody tests. These factors included media, methods of killing, strain differences, and the nature of the reactivity with diverse human sera. The maximum serological reactivities were obtained with charcoal-yeast extract agar; the relative antigenicity of cells grown on a chemically defined medium could be fourfold less than those grown on the charcoal-yeast extract agar. Cells grown at 25 degrees C showed only small antigenic differences from those grown at 35 degrees C but had better morphological and staining characteristics. Cells killed by 1% Formalin or 37% Formalin vapors showed a 20% less relative antigenicity than those killed by heat, but their cell walls stained more clearly and they had fewer aberrations. As tested with several human sera, cells of Philadelphia 1 showed great variation in relative antigenicity with changes in media or methods of preparation; Bellingham 1 was quite stable under these same conditions. The data suggest that Bellingham 1 had serogroup 1-specific antigens, reactive with human sera, which were not present in Philadelphia 1.

journal_name

J Clin Microbiol

authors

Benson RF,Malcolm GB,Pine L,Harrell WK

doi

10.1128/JCM.17.5.909-917.1983

subject

Has Abstract

pub_date

1983-05-01 00:00:00

pages

909-17

issue

5

eissn

0095-1137

issn

1098-660X

journal_volume

17

pub_type

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