المصدر: A.M. Kammon1,*, R.S. Brar2, S. Sodhi2, H.S. Banga2, J. Singh3 and N.S. Nagra4 1Department of Poultry and Fish Diseases, Faculty of Veterinary Medicine, Al-Fateh University, Tripoli, Libya 2Department of Veterinary Pathology, College of Veterinary Science, GADVASU, Ludhiana, India 3Department of Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Canada 4Department of Livestock Production and Management, College of Veterinary Science, GADVASU, Ludhiana, India