K. Mekademi1*, D. Kebour1,2, N.A. Ouchene-Khelifi1,3, N. Ouchene1,3 1Institute of Veterinary Sciences, University of Saad Dahlab Blida 1, BP270, Street of Soumâa, 09000 Blida, Algeria 2 Department of Biotechnology, Faculty of Natural and Life Sciences, University of Saad Dahlab Blida

I. Zhelyazkova*, S. Lazarov Department of Animal husbandry – Non-ruminants and other animals, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria (Manuscript received 24 August 2018; accepted for publication 26 October 2018) Abstract. The objective of the present st

K. Gurgulova1, I. Zhelyazkova2*, S. Takova1, K. Malinova3 1National Diagnostic and Research Veterinary Medical Institute, 1000 Sofia, Bulgaria 2Department of Animal Science, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria 3Department of Ecology and Landscape Arc