1. Department of Microbiology, Medical School, National and Kapodistrian University of Athens
2. Salmonella and Shigella Reference Centre, National School of Public Health
3. Salmonella Reference Centre for Macedonia and Thrace, Thessaloniki
4. State Veterinary Laboratory, Halkida, Greece
5. Department of Epidemiological Surveillance and Intervention, Hellenic Centre for Infectious Disease Control (KEEL), Athens