[1] Natl Res Inst Anim Prod, Dept Poultry Breeding, PL-32083 Balice, Poland
[2] Univ Warmia & Mazury, Fac Vet Med, Dept Vet Prevent & Feed Hyg, PL-10718 Olsztyn, Poland
[3] Univ Warmia & Mazury, Fac Food Sci, Dept Ind & Food Microbiol, PL-10726 Olsztyn, Poland