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Value of indirect hemagglutination and coagglutination tests for serotyping Haemophilus parasuis
M L Del Río1, C B Gutiérrez, E F Rodríguez Ferri
1Department of Animal Health, Faculty of Veterinary Medicine, León, Spain.
Journal of Clinical Microbiology
|February 8, 2003
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.