Serological classification of Australian isolates of Haemophilus paragallinarum

Thirty-nine Australian isolates of Haemophilus paragallinarum were compared serologically with 3 reference serotype strains of H. paragallinarum using a plate agglutination test. Twenty-eight of the isolates were serotype C, 5 were serotype A, while the remaining 6 isolates could not be assigned to a serotype.