1. Department of Food Hygiene and Control (Milk Hygiene), Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
2. Department of Animal and Poultry Health and Environment, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
3. Department of Biology, College of Science, King Khalid University, Abha, Saudi Arabia
4. Botany and Microbiology Department, Faculty of Science, South Valley University, Qena, Egypt
5. Bacteriology Unit, Reference Laboratory for Quality Control of Poultry Production, Animal Health Research Institute, El-Dokki- Giza, Egypt
6. Department of Zoology, Faculty of Science, Mansoura University, Mansoura, Egypt
7. Department of Theriogenology, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt