MICROMORPHOLOGY OF TEGUMENT OF EURYTREMA PANCREATICUM BEFORE AND AFTER ANTHELMINTICS
The article describes micromorphological features of the tegument of the trematode of the species Eurytrema pancreaticum (Janson, 1899), Loos, 1907, family Dicrocoelliidae Odhner, 1911. The parasites were collected by dissection of spontaneously infected animals (cattle) with Eurytrema and with formed chronic eurythrematosis. Some of the trematodes were collected from the control group of animals, and some after deworming with anthelmintics. Using histological methods in a comparative aspect with the control, changes in the morphological features of the tegument of Eurytrema after effect of hexachloroparaxylol and oxinid were shown. It has been established that the toxic effect of anthelmintics causes destruction of the tegument. This increases the permeability of the drug and its metabolites through the outer cover of the trematodes into their body. There is a complete atrophy of the outer part of the tegument, and in the inner part of the tegument there is a decrease in the number of degenerative cells with hexachloroparaxylol and their increase with oxinid. The comparative effect by two anthelmintics of the old generation on the tegument is described to emphasize the effectiveness of their use in trematodiases, on the one hand, and to show the quality of histological methods in the expert assessment of drugs, on the other.