title: Occurrence of V-factor (NAD) independent strains of Haemophilus paragallinarum.
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.
authors.affiliation: Department of Medical Microbiology, University of Marburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Mouahid
authors.forename: M
authors.initials: M
authors.lastname: Bisgaard
authors.forename: A J
authors.initials: AJ
authors.lastname: Morley
authors.forename: R
authors.initials: R
authors.lastname: Mutters
authors.forename: W
authors.initials: W
authors.lastname: Mannheim
mesh_terms: D000818:Animals; D001482:Base Composition; D002645:Chickens; D004269:DNA, Bacterial / Q000032:analysis* / Q000737:chemistry; D006190:Haemophilus / Q000145:classification* / Q000235:genetics; D006192:Haemophilus Infections / Q000382:microbiology / Q000662:veterinary*; D009243:NAD / Q000378:metabolism*; D009693:Nucleic Acid Hybridization; D010641:Phenotype; D011201:Poultry Diseases / Q000382:microbiology*; D012141:Respiratory Tract Infections / Q000382:microbiology / Q000662:veterinary
chemical_list: D004269:DNA, Bacterial; D009243:NAD