Which viral disease is primarily focused on cattle and is known to affect respiratory health?

Infectious Bovine Rhinotracheitis (IBR) is primarily focused on cattle and significantly impacts their respiratory health. The disease is caused by the bovine herpesvirus-1 (BHV-1), which leads to inflammation of the respiratory tract, often presenting with symptoms such as coughing, nasal discharge, and fever. IBR not only causes acute respiratory disease but can also contribute to secondary bacterial infections due to the damage it causes to the respiratory epithelium.

By targeting the respiratory system, IBR can lead to severe economic consequences in the cattle industry due to increased veterinary costs, decreased productivity, and impacts on animal welfare. This disease is particularly concerning in herds that are not vaccinated against it, highlighting the need for preventive measures in herd management.

Other diseases listed can affect cattle but are not primarily respiratory in nature. For example, Bovine Viral Diarrhea (BVD) impacts overall health and can cause a variety of systemic issues rather than predominantly affecting the respiratory tract. Foot-and-mouth disease is a highly contagious viral infection affecting various livestock and leads to significant oral lesions and productivity losses but is not primarily respiratory. Parainfluenza 3 (PI-3), while it does affect cattle's respiratory health in some