Stomach parasites of wild boars in the Lower Silesia district
Magdalena Kantyka , Zenon Sołtysiak
AbstractWild boars feed on a varied diet consisting of plants and animals. As omnivorous scavengers, they eat almost anything they come across during foraging, including grass, nuts, berries, carrion, the nests of ground nesting birds, roots, tubers, insects and small reptiles or rodents. Wild boars inhabit nutrient-rich, deciduous and mixed forests nearby agricultural land, so they are an important link in the circulation of parasites between the forest environment (sylvatic) and the farm (livestock). The animals, that wild boar feed on are in many cases the intermediate hosts of numerous parasites. Dung beetles commonly found in the woods (e.g Anoplotrupes stercorosus or Trypocopris vernalis) are the intermediate hosts of parasitic stomach nematodes belonging to the Spiruroidea superfamily, represented by Ascarops strongylina and Physocephalus sexalatus, found in feral pigs in Lower Silesia in the period from November 2011 to December 2012. Tests for confirmation of the stomach parasites were conducted on 64 wild boars of both sexes aged from 8 months to 6 years, which were shot during hunts in the Zlotowek Forest Inspectorate (Lower Silesia). The stomachs of the wild boars were collected immediately after the animals were killed, packed in refrigerated containers and transported to the Division of Parasitology, where necroscopy of the internal organs was conducted. During the study, the parasites were found in the gastric mucosa in 20 cases. The parasites were the most frequently observed in the area of the fundus along the greater curvature. The morphological studies confirmed the existence of two species of parasites: Ascarops strongylina and Physocephalus sexalatus. No examples of mixed infection were found. Rectal faecal samples collected from killed animals confirmed the presence of parasite eggs stated at necroscopy. The intensity of the infection in affected individuals was varied and ranged from 1 to 28 parasites in the lumen of the stomach. Previous studies indicate that stomach infestations in wild boars are common in Europe (Fernandez-de-Mera et al. 2004, Humbert and Henry 1989). Pathological changes caused by the parasites are varied and depend on the degree of intensity of the invasion. In the case of extensive infection, frequent effects are ulceration, gastritis and digestive disorders. Clear inflammatory lesions of the gastric mucosa with local reddening were diagnosed only in two cases during the studies. Monitoring the presence of parasites in wild boars is justified, as they increasingly inhabit surroundings of farms and can be a potential source of parasites for livestock.
|Journal series||Annals of Parasitology, ISSN 2299-0631, e-ISSN 2300-6706, (B 15 pkt)|
|Conference||XXIIIth Congress of the Polish Parasitological Society, 04-09-2013 - 07-09-2013, Szklarska Poręba-Piechowice, Polska|
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