Antibodies to Legionella pneumophila serotype 1 among the healthy New Zealand population.

The antibody levels to Legionella pneumophila, serotype 1 in two groups of healthy New Zealanders have been determined by the indirect fluorescent antibody test. These have been compared with antibody levels obtained from patients' sera submitted for L. pneumophila antibody levels. Significant levels of antibody have been found among the healthy people. The lower age groups demonstrated greater levels of immunity than those of patients suspected of having the disease.