title: Modulation of cross-protection factor(s) of avian Pasteurella multocida.
abstract: Cross-protection factor(s) (CPF) of Pasteurella multocida were maintained in vitro through at least 9 serial passages. Different growth media and temperatures enhanced or repressed the ability of P. multocida to produce CPF. Certain amino acids were innoculous to expression of CPF. B-vitamins enhanced CPF, whereas certain inorganic salts repressed CPF. The plasma of normal tuekeys contained a compound or compounds that were responsible for expression and maintenance of CPF.
mesh_terms: D000818:Animals; D001428:Bacterial Vaccines / Q000276:immunology; D003429:Cross Reactions; D003470:Culture Media; D010325:Pasteurella / Q000254:growth & development / Q000276:immunology*; D010326:Pasteurella Infections / Q000517:prevention & control / Q000662:veterinary; D011201:Poultry Diseases / Q000517:prevention & control; D014422:Turkeys / Q000276:immunology
chemical_list: D001428:Bacterial Vaccines; D003470:Culture Media