title: Reactivity of nonsensitized control erythrocytes in rubella passive hemagglutination assays.
abstract: Two commercially available, nonsensitized control erythrocytes for use in rubella antibody passive hemagglutination assays detected nonspecific reactions in 10 of 600 (1.7%) and 9 of 500 (1.8%) sera tested. Reactive sera were positive with one or the other cell type, but not both. The probability of obtaining a false-positive result owing to a nonspecific passive hemagglutination reaction was estimated to be 0.17% for either cell type.
mesh_terms: D004912:Erythrocytes / Q000276:immunology*; D006385:Hemagglutination Inhibition Tests; D006386:Hemagglutination Tests / Q000379:methods; D006801:Humans; D012412:Rubella virus / Q000276:immunology*