1. Hygiene Laboratory, Medical School, University of Ioannina, Ioannina, Greece
2. Laboratory of Microbiology, Biotechnology and Food Hygiene, Department of Food Science and Technology, Faculty of Agricultural Development, Democritus University of Thrace, Orestiada, Greece
3. Laboratory of Animal Health and Infectious Diseases, Department of Animal Production, TEI of Epirus, Arta, Greece