title: Pasteurella haemolytica of cattle: serotype, production of beta-galactosidase and antibacterial sensitivity.
abstract: Two hundred and three isolates of Pasteurella haemolytica from cattle were studied. They originated from the nasal cavity of cattle in housed herds; the nasal cavity and pneumonic lungs of experimental feedlot calves and from pneumonic bovine lungs submitted for bacteriological diagnosis.To determine whether a single characteristic or combination of characteristics might be a feature of isolates collected from animals with pneumonic pasteurellosis (Shipping Fever), the following tests were made. Cultures were serotyped by indirect haemagglutination; the ability to produce beta-galactosidase was examined in the ortho-nitrophenyl-beta-D-galactopyranoside (ONPG) test and antibacterial sensitivity tests were done. None of these factors could be directly related to the role of P. haemolytica in "Shipping Fever".
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology*; D005696:Galactosidases / Q000096:biosynthesis*; D006386:Hemagglutination Tests; D008168:Lung; D008722:Methods; D008826:Microbial Sensitivity Tests; D009666:Nose; D010325:Pasteurella / Q000201:enzymology / Q000302:isolation & purification*; D010326:Pasteurella Infections / Q000382:microbiology*; D012703:Serotyping
chemical_list: D005696:Galactosidases