MORPHOMETRIC ANALYSIS OF OPISTHORCHIS FELINEUS (S. RIVOLTA, 1884) MARITA EGGS IN DIFFERENT DEFINITIVE HOSTS

The morphological variability of trematodes in different definitive hosts is reflected in the ovoproduction of the parasite. The size and structure of eggs have major diagnostic and therapeutic importance in a parasitic disease. A morphometric study of eggs in slides of trematodes Opisthorchis felineus (S. Rivolta, 1884) in humans and rabbits was conducted in a comparative aspect. Histological specimens of autopsy material from the liver with O. felineus marita in bile ducts in the form of microslides were treated by standard bichrome hematoxylin-eosin staining and examined by light microscopy. The study material was obtained from animals after 1.5 years in own experiment, and the infectious dose was 50 metacercariae each. The human autopsy material was provided by the Kuzbass Clinical Pathoanatomical Bureau. The morphometric study was conducted using a special morphometric Zeiss Axio Vision software and a digital camera of Zeiss Primo Cam Edition light microscope. It was found that the sizes of eggs were different by the main parameters: length and width, in different definitive host species. As a result of comparative morphometry, the sizes of O. felineus eggs were larger in the atypical host (rabbit) than the typical host (human), which can be explained by intraspecific polymorphism in the parasite