Morphological and molecular identification of adult Stichorchis subtriquetrus in beaver in Slovakia.

The European beaver (Castor fiber) was a fully eradicated species in Slovakia. Thanks to year-round protection and several different reintroduction programs the population is now increasing. However, there are limited reports about their health status.A 2-year-old female European beaver, was found dead by road near town Hanušovce nad Topľou in eastern Slovakia in 2021. Necropsy was carried out at the Department of Breeding and Diseases of the Game, Fish and Bees, Ecology and Cynology, University of Veterinary Medicine and Pharmacy in Košice. Necropsy revealed a total of 13 trematodes, collected from the caecum and colon. Based on morphological and molecular analysis digenean trematode Stichorchis subtriquetrus (Rudolphi, 1814) was identified. This is the first record of adult helminth Stichorchis subtriquetrus in beaver in Slovakia.