Ferrouk Mustapha1, Gharbi Ismail1, Adel Djallal1, Lafri Mohamed1, Touati Kamel2, Kaidi Rachid1 and Djamel Guetarni1
1Faculty of Agro-Veterinary Science, University Saad Dahlab of Blida, Algeria. 2Faculty of Veterinary Medicine, Liege, Belgium.