Vaccines comprising acapsular P. multocida hyaE deletion mutants

摘要

Acapsular hyaE deletion mutants of P. multocida can be administered to mammals, particularly ungulates, or birds to provide protective immunity against wild-type P. multocida, e.g., to prevent or reduce the severity of hemorrhagic septicemia or pneumonia in mammals, particularly livestock, ungulates, and companion animals, or fowl cholera in birds, particularly poultry.