Advances in Animal and Veterinary Sciencesor physiological stress induced by unfavourable climatic and ecological conditions, including severely bad weather, improper management, co-mingling, overcrowding, shipping or prior infection with mycoplasma, respiratory viruses or certain other pathogens, may therefore contribute to pneumonic pasteurellosis (Tadesse et al., 2017).The acute febrile course of pneumonic pasteurellosis is characterized by death of infected animals within few days after the onset of clinical signs if they are not properly