Effect of Trypanosome Infection on Hematological Parameters of the Black Sea Sprat (Clupeonella cultriventris) from the Ivankovo Reservoir

For the first time, light microscopy was used to study the parameters of red and white blood cells and thrombocytes were studied in the Black Sea Sprat (Clupeonella cultriventris Nordmann) from the Ivankovo Reservoir, in the peripheral blood of which trypanosomes were found. A shift in the composition of erythrocytes towards immature cells, lymphopenia, an increase in the proportion of immature granulocytes, and a decrease in the proportion of platelets are shown. It was noted that earlier this species of fish in the Ivankovo reservoir was not infected with trypanosomes.