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  • Title: Occurrence of V-factor (NAD) independent strains of Haemophilus paragallinarum.
    Author: Mouahid M, Bisgaard M, Morley AJ, Mutters R, Mannheim W.
    Journal: Vet Microbiol; 1992 Jun 15; 31(4):363-8. PubMed ID: 1496809.
    Abstract:
    Strains of Bisgaard taxon 31, isolated from chickens in South Africa suffering from a respiratory disease with clinical symptoms and gross lesions similar to infectious coryza, showed great phenotypical similarities with Haemophilus paragallinarum infection except for NAD requirement, beta-galactosidase activity and maltose fermentation. Deoxyribonucleic acid-deoxyribonucleic acid hybridization confirmed a high level of genetic relatedness (DNA binding value, 89%) with Haemophilus paragallinarum. Guanine + cytosine content and genome size data also support the classification of taxon 31 strains within the species Haemophilus paragallinarum.
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