1. Department of Poultry, Zagazig University, Zagazig, Egypt
2. Cholistan University of Veterinary and Animal Sciences Bahawalpur,Bahawalpur,Pakistan
3. Sindh Agriculture University,Department of Veterinary Microbiology,,Tandojam,Pakistan
4. Cholistan University of Veterinary and Animal Sciences Bahawalpur,,Bahawalpur,Pakistan
5. University of Queensland,Australia
6. Zagazig University, Zagazig, Egypt
7. Zagazig University,Department of Agricultural Microbiology,Zagazig,Egypt