The trematode cercariae fauna in Central Uzbekistan
The trematode cercariae fauna in Central Uzbekistan

Summary/Abstract: The results of the research show that molluscs in the water bodies of Central Uzbekistan were infected with trematode cercariae. The infection of Lymnaeidae, Planorbidae, Physidae and Thiaridae molluscs with trematode cercariae was studied, and larvae of 32 species were identified. The trematode cercariae fauna in Central Uzbekistan has been enriched with a number of new species: Fasciola gigantica, Diplostomum helveticum, Calicophoron calicophorum, Liorchis scotiae, Gastrothylax crumenifer, Notocotylus ephemera, Skrjabinoeces similis, Strigea falconis, Philophthalmus lucipetus, Dendritobilharzia loossi, Gigantobilharzia acotylea, Gigantobilharzia sp. The composition of these cercariae is distinguished by its diversity in the molluscs Lymnaea auricularia (14 species) and Planorbis planorbis (15 species). In general, it was found that the fauna of the detected cercariae belonged to 15 families of trematodes. 2 cercariae species were recorded in each of the molluscs Physa fontinalis and Melanoides kainarensis. It was shown that adult forms of the detected trematode cercariae occur in fish, birds and mammals. The importance of molluscs in the formation of the cercariae fauna was highlighted. During the research period, monitoring was carried out in the water bodies of the indicated regions. As an example, stationary studies were conducted on the molluscs L. auricularia and P. planorbis in the Tudakul Reservoir. During the study period in the upper part of the reservoir, the incidence of accidental infection with trematode parthenites and cercariae in L. auricularia mollusca was 22.0–32.6%, in the middle part, the infection rate was 7.6%, and in the lower part, this rate was 11.2–25.7%. A similar situation can be observed with the infection of another mollusca species P. planorbis, the difference from L. auricularia mollusca is that the infection rate is significantly lower. At the same time, the main factors influencing the formation of the cercariae fauna in the study area are presented.

• Details
• Contents