Authors
Krystyna Pohorecka
krystyna.pohorecka@piwet.pulawy.pl
National Veterinary Research Institute, Department of Honeybee Diseases,, Puławy, Poland
Teresa Szczęsna
Research Institute of Horticulture, Apiculture Department,, Puławy, Poland
Monika Witek
Research Institute of Horticulture, Apiculture Department,, Puławy, Poland
Artur Miszczak
Research Institute of Horticulture, Food Safety Laboratory,, Skierniewice, Poland
Piotr Sikorski
Research Institute of Horticulture, Food Safety Laboratory,, Skierniewice, Poland