1. Department of Vector-Borne Diseases, Institute of Parasitology, Slovak Academy of Sciences, Košice, Slovakia.
2. Pavol Jozef Šafárik University, Department of Anatomy, Košice, Slovakia.
3. Department of Medical Zoology, Institute of Zoology, Slovak Academy of Sciences, Bratislava, Slovakia.
4. Veterinary and Food Institute, Bratislava, Slovakia.
5. Veterinary and Food Institute, Košice, Slovakia.