1. Institute of Parasitology, SAS, Hlinkova 3, Košice, Slovakia.
2. P.J. Šafárik University in Košice, Faculty of Natural Sciences, Institute of Biology and Ecology, Moyzesova 11, Košice, Slovakia.
3. Clinic of birds, exotic and wild animals, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, Košice, Slovakia.