[1] Slovak Acad Sci, Inst Zool, Bratislava 84506, Slovakia
[2] Vietnamese Acad Sci & Technol, IEBR, Dept Parasitol, Hanoi, Vietnam
[3] Acad Sci Czech Republ, Inst Vertebrate Biol, Vvi, CS-60365 Brno, Czech Republic
[4] Univ Vet & Pharmaceut Sci, Fac Vet Hyg & Ecol, Dept Biol & Wildlife Dis, Brno 61242, Czech Republic