title: Value of indirect hemagglutination and coagglutination tests for serotyping Haemophilus parasuis.
abstract: An indirect hemagglutination test (IHA) and a coagglutination test (CA) were evaluated using saline, boiled, and autoclaved extracts for serotyping Haemophilus parasuis. CA showed several cross-reactions, whereas IHA gave rise to specific reactions, with minor exceptions. IHA was further compared with the immunodiffusion test (the "gold standard") for the serotyping of 67 field isolates. As a conclusion, IHA is recommended as a useful method for sensitive and specific serotyping of H. parasuis.
authors.affiliation: Department of Animal Health, Faculty of Veterinary Medicine, León, Spain.
authors.forename: M L
authors.initials: ML
authors.lastname: Del Río
authors.forename: C B
authors.initials: CB
authors.lastname: Gutiérrez
authors.forename: E F
authors.initials: EF
authors.lastname: Rodríguez Ferri
mesh_terms: D006190:Haemophilus / Q000145:classification*; D006386:Hemagglutination Tests / Q000379:methods*; D006801:Humans; D012680:Sensitivity and Specificity; D012703:Serotyping