Wystepowanie swidrowcow Trypanosoma carassii we krwi ploci Rutilus rutilus i lina Tinca tinca

212 freshwater fishes, belonging to 7 species, were examined for the presence of trypanosomes. The fishes were coming from breeding ponds in Gołysz (Silesia). The blood smears were fixed with methyl alcohol and stained with Giemsa method. Trypanosoma carassii MITROPHANOW, 1883 was found in blood of roach Rutilus rutilus (L.) (in 4 out of 19 examined specimens) and tench Tinca tinca (L.) (in 2 examined fishes). In trypanosomes from blood of both species of host there was observed a considerable variety of forms and size of body. Morphological description is completed with morphometrical values in the Tab. 2. Our own morphological description and morphometrical values have been compared with those of other authors. The authors of this paper agree with the opinion of LOM and DYKOVA (1992) that Trypanosoma tincae LAVERAN et MESNIL, 1904 is the synonym of Trypanosoma carassii.