Field trial of primary and booster dose of inactivated vaccine against bovine respiratory bacteria in young Holstein calves

Abstract

The objective of this research was to evaluate the antibody response to multiple doses of an inactivated mixed vaccine against Histophilus somni, Pasteurella multocida, and Mannheimia haemolytica, and to investigate the influence of age at time of vaccination in the field.

Keywords

• bovine respiratory disease
• young calves
• early vaccination