Distribution of Trematodes of Vertebrates by Regions of Uzbekistan

The purpose of this research is to study the distribution of trematodes of vertebrates by individual regions of Uzbekistan. Helminthological material was collected from vertebrates in the eastern, northeastern, central, southern, and northwestern parts of the Republic. The trematode infection rate in vertebrates was determined by complete and partial helminthological dissections of animals. During 2000- 2023, 3,380 vertebrate animals were examined using the method of complete helminthological dissections. Trematodes of the vertebrate fauna in Uzbekistan were represented by 186 species (174 species in adult form and 12 species in larval form) belonging to 89 genera, 35 families, 13 orders and two subclasses (Bucephalidea and Prosostomidea) of the Trematoda class. The research results showed that the quantitative ratio of trematodes of vertebrates prevailed in the northeastern region where 128 species were recorded; 70 in the northwestern region; per 31 species in the central and eastern regions, and 21 species in the southern region. Of 186 trematode species, the most pathogenic were representatives of the families Fasciolidae, Echinostomatidae, Paramphistomatidae, Dicrocoeliidae, Prosthogonomidae, Alaridae, Diplostomidae, Brachylaimidae, Notocotylidae, Bilharziellidae and Schistosomatidae in Uzbekistan and had epizootological and epidemiological significance. In this connection, when organizing anthelminthic measures, it is necessary to consider the degree of species distribution and its morphobiological characteristics. This will ensure the effectiveness of taken measures and livestock survival and increase animal productivity.