1. Institute of Parasitology, Biology Centre CAS, České Budějovice, Czech Republic.
2. Faculty of Agriculture, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic.
3. Faculty of Science, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic.
4. Department of Biology and Medical Parasitology, Wroclaw Medical University, Wroclaw, Poland.
5. Microbiological Sciences Department, North Dakota State University, Fargo, North Dakota.