Losyev O. Flagellate blood parasites (Euglenozoa, Kinetoplastidеa) of freshwater fishes from reservoirs of Kiev Polissja.

Nine species of parasitic flagellates was registered.Genus Trypanoplasma was presented by 2 species, genus Trypanosoma - 4 species (T. elegans, T. gasimagomedovi, Trypanosoma sp. were firstly registered in Ukraine). T. (С.) borreli and T. carassii were registered as polyxenous species. Others seven species of blood parasites were monoxenous. The occurrence of thin mucosal layer, covering parasite cell was established during ultrastructural analysis of T. carassii. The dynamics of distribution of flagellates depending on the ecological peculiarities of hosts his age and seasonal distribution were studied. Firstly established that T.borreli infecting Cobitis taenia are polixenous parasite.