| 摘要 |
<p>Antigens of the Pasteurella, Actinobacillus and Haemophilus species of bacteria capable of being up-regulated during infection in a host animal and in minimal medium formulations which provide protection against infections caused by these species are disclosed. Vaccine compositions containing antigens of the Pasteurella, Actinobacillus and Haemophilus species of bacteria are also provided along with methods of immunizing animals against infections by these species.</p> |
