Principles of Biological Control of Shipping Fever
DOI:
https://doi.org/10.21423/aabppro19807228Keywords:
Pasteurella haemolytica, bovine, immunizationAbstract
Using calves immunized with P. haemolytica serotype 1 and challenged by intrabronchial infusion of the homologous organism, the adverse effects of parenterally injected whole cell bacterins has been confirmed experimentally. Successful vaccination of calves to prevent Pasteurella-induced fibrinous pneumonia apparently cannot be accomplished by the simple expedient of parenteral injection of formalin killed bacterial cells.