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Abstract Filaroid nematodes Setaria tundra (Issaitshikoff & Rajewskaya, 1928) and Setaria cervi (Rudolphi, 1819) are internal parasites from family Onchocercidae with occurrence in the northern hemisphere. They have a considerably wide range of final host, including many species of family Cervidae. Intermediate hosts and vectors at the same time, are represented by the several mosquito species, mostly of genus Aedes. Infection of Setaria is relatively harmless and especially in wild cervids usually pass unnoticed. Although in some cases it can induce peritonitis which might be a life threatening condition. This study was determined to reveal the presence of helminths Setaria tundra and Setaria cervi in red deer ( Cervus elaphus ) in Slovakia. The parasites were identified morphologically and genetically, based on the sequences of a fragment of the mitochondrial cytochrome c oxidase subunit 1 ( cox 1) gene. For this purpose we used partial results of our longer parasitological monitoring realized in one particular hunting area located in eastern Slovakia, near the city of Košice. A total of 60 red deer individuals were tested, of which one was found to be infected with Setaria tundra (prevalence of 1.7%) and four were detected to be infected with Setaria cervi (prevalence 6.7%). The intensity of infection was very low, only one specimen of Setaria spp. in each positive animal.
Lazár et al. (Fri,) studied this question.