title: Heartwater serology: some problems with the interpretation of results.
abstract: Antibodies in the sera of domestic ruminants that have been infected with Ehrlichia bovis and other ehrlichial agents cross-react with the Kümm strain of Cowdria ruminantium used in the indirect fluorescent antibody test as antigen. These cross-reactions are also shown by the Elisa test in which the Ball 3 strain of the heartwater agent is used as antigen.
authors.affiliation: Veterinary Research Institute, Onderstepoort.
authors.forename: J L
authors.initials: JL
authors.lastname: Du Plessis
authors.forename: E
authors.initials: E
authors.lastname: Camus
authors.forename: P T
authors.initials: PT
authors.lastname: Oberem
authors.forename: L
authors.initials: L
authors.lastname: Malan
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000276:immunology; D003429:Cross Reactions; D004536:Ehrlichia / Q000276:immunology; D005455:Fluorescent Antibody Technique; D006357:Heartwater Disease / Q000276:immunology*; D012288:Rickettsiaceae Infections / Q000276:immunology / Q000662:veterinary; D012698:Serologic Tests