Infection diseases of the respiratory system nowadays are the most important disturbances of herd health in the bovine in Germany. Besides of enzootic bronchopneumonia, IBR (BHV - 1 - Infection) and BVD-dependent bronchopneumonia more and more infections caused by coronavirus and BRSV are registered. Symptoms, methods of diagnosis, therapy and prophylaxis are quite different from other maladies in the BRSV-complex. Own investigations, clinical, virological and other ones will be demonstrated, . Treatment and methods for eridication of the infection from the farms will be discussed.