Bovine Respiratory Disease
Beef Cattle Research Council
Bovine Respiratory Disease (BRD) is the most common and costly disease affecting the North American beef cattle industry. In the broadest sense, BRD refers to any disease of the upper or lower respiratory tracts. BRD is commonly associated with infections of the lungs causing pneumonia in calves that have recently been weaned or recently arrived at the feedlot (which is why it is often referred to as shipping fever).