Bovine respiratory disease (BRD), also known as pneumonia, is a common and economically significant disease of cattle. It is caused by a variety of infectious agents, including bacteria, viruses, and mycoplasma. BRD can be spread through direct contact between infected and susceptible animals, as well as through indirect contact with contaminated objects, such as feed, water, and clothing.
Horses can also be infected with BRD, and they can transmit the disease to cattle. In addition, some of the infectious agents that cause BRD in cattle can also cause disease in horses, such as Streptococcus pneumoniae and Mannheimia haemolytica.
Therefore, it is important to isolate infected animals and to practice good hygiene and biosecurity measures to prevent the spread of BRD between cows and horses.