1. 1 Sub-Department of Veterinary Microbiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin , Lublin , Poland
2. 4 Department of Microbiology, National Veterinary Research Institute , Puławy , Poland
3. 2 Department and Clinic of Animal Reproduction, Faculty of Veterinary Medicine, University of Life Sciences , Lublin , Poland
4. 3 Department of Preclinical Veterinary Sciences, Faculty of Veterinary Medicine, University of Life Sciences in Lublin , Lublin , Poland