Nesibu Awol1, Gelagay Ayelet2, Shiferaw Jenberie2*, Esayas Gelaye2, Tesfaye Sisay1 and Haileleul Nigussie1
1Faculty of Veterinary medicine, A.A.U, P. O. Box: 34, Debre Zeit, Ethiopia.
2National Veterinary Institute, P. O. Box: 19, Debre Zeit, Ethiopia.
