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  • Title: Infectious coryza: cross-protection studies, using seven strains of Haemophilus gallinarum.
    Author: Rimler RB, Davis RB, Page RK.
    Journal: Am J Vet Res; 1977 Oct; 38(10):1587-9. PubMed ID: 931140.
    Abstract:
    Bacterins prepared from 7 strains of Haemophilus gallinarum were used to immunized chickens for cross-protection studies. Three distinct immunotypes were distinguished. Slight protection between immunotypes was evident for some strains. Airsacculitis could be prevented by use of these bacterins; however, prevention was related to immunotype specificity. Hyaluronic acid found in 2 strains rendered them inagglutinable in homologous antiserums. Treatment with hyaluronidase rendered them agglutinable.
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