**Author details**

Magdalena Larska1 \* and Michał K. Krzysiak2,3

1 Department of Virology, National Veterinary Research Institute, Puławy, Poland

2 Białowieża National Park, Białowieża, Poland

3 Department of Food Hygiene and Public Health Protection, Faculty of Veterinary Medicine, Warsaw University of Life Sciences, Warszawa, Poland

\*Address all correspondence to: m.larska@piwet.pulawy.pl

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
