Eighty fecal samples from free living wild boars and internal organs from eleven hunted animals from Bulgaria were investigated during 2016–2017. The fecal samples were analyzed with the coproscopical methods of Fulleborn, Shterbovich and serial sedimentations, as well as the modified Baermann technique. Helminthological necropsies of the lungs and gastrointestinal tracts of the animals were carried out through the common technique. Ten helminth genera (Metastrongylus, Strongyloides, Oesophagostomum, Hyostrongylus, Globocephalus, Nematodirus, Ascaris, Ascarops, Trichuris, Macracanthorhynchus) and one protozoa (Eimeria) were established through coproscopical investigations. Helminths of the species Metastrongylus elongatus, M. pudendotectus, M. salmi, Globocephalus urosubulatus, Oesophagostomum dentatum, O. quadrispinulatum, Trichuris suis, Macracanthorhynchus hirudinaceus, Ascaris suum, Ascarops strongylina and Physocephalus sexalatus were found during the necropsies. Metastrongylus, Globocephalus and Oesophagostomum were the genera with the highest prevalence of infection being respectively 28.75%, 13.75% and 12.5%. These were also the genera with the highest territorial incidence. Metastrongylids were found in eight of the eleven examined areas, while globocephalids and oesophagostomids were found in four of them. The infections of Metastrongylus spp., Oesophagostomum spp. and Ascarops spp. were with the highest intensity. This is the first study in which O. quadrispinulatum has been found in wild boar from Bulgaria.
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