ALARIOSIS OF CARNIVOROUS ANIMALS IN CENTRAL RUSSIA

The spread of alariosis of fishing animals of Central Russia was clarified and a circle of host agents among mammals was identified. The material for the study was the arcasses of trade animals. The period of work was 2018–2020. Animals were studied according to the method of complete helminthological study on K.I. Skryabin (1928). The tissue form of alariosis was examined by trichinelloscopic methods. During the reporting period, 107 heads of carnivorous animals (of which 27 heads (25.2%) are considered stray domestic) extracted in the territory of the Ryazan, Vladimir and Moscow regions. Of the Canidae family, 54 heads have undergone helminthological examination (29 foxes, 17 domestic dogs, 7 raccoon dogs, and 1 wolf). Of the cat (Felidae), 11 heads have been studied (domestic cats – 10, lynx – 1). Martens animals (Mustelinae) have been studied 42 heads (forest мartens – 19, stone мartens – 6, river otter – 4, ermines – 7, badgers – 2, аmerican mink – 4). Adult trematodes have been identified in 37 carnivorous animals (34.6%) in the thin part of the intestine. Canidae animals representing trade species (fox, raccoon dog, wolf) are 100% infected with the agent of alariosis. The intensity invasion of fox was 4–250 copies per head, raccoon dogs – 11–284, wolf – 84. The larval form of the agent was recorded in one fox (3.5%), 2 forest мartens (10.5%) and one аmerican mink (25.0%). Mesocercaries of trematodes were localized in a transparent capsule in lung parenchyma, in diaphragm muscle tissue, in esophageal muscle tissue.