Bovine Respiratory Disease
Bovine respiratory disease (BRD) is one of the most common diseases among cattle. It is mostly prevalent among young calves and is caused by a mix of pathogens, environment, and management factors. The four main bacterial pathogens are Mannheimia haemolytica, Histophilus somni, Pasteurella multocida, and Mycoplasma bovis (Confer, 2009). These bacteria are transmitted by direct contact, use of contaminated equipment, and stress that weakens the immune system as a result of transport or a change in diet.