1. Laboratory of Microbiology and Infectious Diseases; School of Veterinary Medicine; Faculty of Health Sciences; Aristotle University of Thessaloniki; Thessaloniki Greece
2. Department of Surveillance and Intervention; Hellenic Centre for Disease Control and Prevention; Athens Greece
3. Ecodevelopment S.A. - Environmental Applications; Thessaloniki Greece
4. Department of Hygiene and Epidemiology; School of Medicine; Faculty of Health Sciences; University of Thessaly; Larissa Greece