IBR (Infectious Bovine Rhinotracheitis) is an infectious viral disease of cattle caused by Bovine Herpes Virus 1 (BHV-1). IBR is the most common clinical manifestation associated with BHV-1 infection. The severity of disease associated with IBR infections can range from very mild/inapparent to very severe. Inflammation of the nostrils and upper airways of cattle, associated with a high temperature are the most common clinical signs. The virus can also cause abortion in pregnant cattle as well as pharygitis in young calves.