ECOLOGICAL AND BIOLOGICAL ASPECTS OF CIRCULATION OF OPISTHORCHIDS UNDER CONDITIONS OF VORONEZH REGION
Abstract
Objective of research: a study on the ecological and biological features of circulation of opisthorchiasis in conditions of Upper Don river (Voronezh region) based on retrospective and modern original materials. Materials and methods: wild carnivores (fox, stone marten, pine marten, American mink), and domestic carnivores (dog and cat) were examined by the method of full helminthological autopsy. Cyprinid fish have been investigated by compression method. The number of Opisthorchis metacercaria in fish muscles were calculated to determine the number values. Taxonomic studies were carried out using the field guides. Processing of whole-mount and terminal preparations from larval and adult trematodes was conducted by standard and laboratory-developed methods. The index of abundance, intensity and extensity of infection were used to evaluate the qualitative and quantitative characteristics of infestation and the prevalence of larval and adult opisthorchids in hosts. Results and discussion: 4 types of opisthorchids were registered in Voronezh region: Opisthorchis felineus, Pseudamphistomum truncatum, Metorchis bilis and M. xanthosomus. It was determined that first of all the opisthorchiasis foci occur at small rivers. Opisthorchis marites were found in 5 types of mammals in natural ecosystems of Voronezh region. Domestic cats play a key role in circulation of opisthorchiasis in anthropogenic ecosystems of Voronezh region. The evaluation of infestation of cyprinid fish with Opisthorchis metacercariae was presented. It was found that with respect to invasion and accumulation of Opisthorchis metacercariae there are 3 dominant types of cyprinid fish: roach, redfin and bleak leading.
About the Authors
E. N. Romashova
Voronezh State University named after Emperor Peter the Great
394087, Voronezh, 114/2 Lomonosov St.
Russian Federation
Russian Federation
B. V. Romashov
Voronezh State University named after Emperor Peter the Great
394087, Voronezh, 114/2 Lomonosov St.
Russian Federation
Russian Federation
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Review
For citations:
Romashova E.N., Romashov B.V. ECOLOGICAL AND BIOLOGICAL ASPECTS OF CIRCULATION OF OPISTHORCHIDS UNDER CONDITIONS OF VORONEZH REGION. Russian Journal of Parasitology. 2015;(4):49-60. (In Russ.)
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