Legesse Garedew1, Gelagay Ayelet2, Roman Yilma3, Aschalew Zeleke2 and Esayas Gelaye2*
1Faculty of Veterinary Medicine, Gondar University, P. O. Box 196, Gondar, Ethiopia. 2National Veterinary Institute, P. O. Box: 19, Debre Zeit, Ethiopia.
3Debre Birhan Agricultural Research Center, P. O. Box: 112, Debre Birhan, Ethiopia.
