1. Department of Parasitology and Microbiology, Faculty of Veterinary and Animal Sciences, PMAS-Arid Agriculture University, Rawalpindi 46000, Pakistan.
2. The Roslin Institute, University of Edinburgh, Easter Bush Campus, Midlothian, Scotland, EH25 9RG, UK.
3. Department of Clinical studies, Faculty of Veterinary and Animal Sciences, PMAS-Arid Agriculture University, Rawalpindi 46000, Pakistan.
4. Department of Zoology, Faculty of Sciences, PMAS-Arid Agriculture University, Rawalpindi 46000, Pakistan.