1. Dairy Department, Food Technology Research Institute, Agricultural Research Center, Ministry of Agriculture, Giza, Egypt
2. Dairy Chemistry Department., Animal production Research Institute, Agricultural Research Center, Ministry of Agriculture, Dokki -Giza, Egypt
3. Clinical Pathology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
4. Department of Natural Resources, Faculty of African Postgraduate Studies, Cairo University, Giza Egypt