title: Upper limit of normal titer for detection of antibodies to Legionella pneumophila by the microagglutination test.
abstract: An upper limit of normal microagglutination titer for the Knoxville strain of Legionella pneumophila was determined by testing 830 sera. The upper limit of normal titer was found to be 8; however, we suggest that when applied to single serum specimens a titer of 32 be considered the lowest titer suggestive of infection (not necessarily disease).
mesh_terms: D000372:Agglutination Tests; D000907:Antibodies, Bacterial / Q000032:analysis*; D001419:Bacteria / Q000276:immunology*; D006801:Humans; D007877:Legionnaires' Disease / Q000276:immunology / Q000382:microbiology*
chemical_list: D000907:Antibodies, Bacterial