1. Department of Zoology, Tanta University, Tanta, Egypt
2. Toxicology Centre, University of Saskatchewan, Saskatoon, Canada
3. Meadow Ridge Enterprises LTD, Saskatoon, Canada
4. Faculty of Science,Vaccine and Infectious Disease Organization, University of Saskatchewan, Saskatoon, Canada
5. Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, Canada