[1] Univ Ostrava, Fac Sci, Life Sci Res Ctr, Ostrava 71000, Czech Republic
[2] Czech Acad Sci, Ctr Biol, Inst Parasitol, Ceske Budejovice 37005, Budweis, Czech Republic
[3] Univ South Bohemia, Fac Sci, Ceske Budejovice 37005, Budweis, Czech Republic
[4] Canadian Inst Adv Res, Toronto, ON M5G 1Z8, Canada