Levels of antibody against Legionella pneumophila serotype 1 in healthy populations in five areas in New Zealand

Abstract
Levels of antibody to L. pneumophila serogroup 1 in 5 areas of New Zealand were determined by indirect immunofluorescence. Both IgG and IgM levels were separately assessed. Of the 500 people studied, 2.8% had IgG titers of .gtoreq. 1:128 and 4.0% had IgM titers of .gtoreq. 1:128. Higher levels of IgG reactivity were noted in the southern part of New Zealand, but neither age nor sex appeared to be related to variations in antibody levels.