M. F. Najeeb, A. A. Anjum, M. U. D. Ahmad, H. M. Khan, M. A. Ali, M. M. K. Sattar
1 Department of Microbiology, Faculty of Veterinary Sciences, University of Veterinary and Animal Sciences, Lahore, 54000
2 Department of Epidemiology and Public Health, FVS, UVAS, Lahore, 54000
3 Department of Pharmacy, Lahore College for Women University, Jail road, Lahore, 54000
4 *** University College of Veterinary and Animal Sciences, The Islamia University of Bahawalpur, Bahawalpur.