Trichinellosis is one of the most widespread parasitic zoonoses. Trichinella Owen, 1835 nematodes are found in pigs, horses, and humans in the domestic cycle, and in many carnivores and omnivores in the sylvatic cycle, such as wild boars, red foxes, raccoon dogs, and wolves. Carnivores are known to be involved in the circulation of Trichinella nematodes and they act as a reservoir in the sylvatic environment. The aim of this study was to determine the occurrence of Trichinella spp. infection in red foxes in Poland. Samples were collected from 2010 to 2015 in different regions of the country and then tested for Trichinella nematodes using HCl–pepsin digestion. Trichinella larvae were found in 10.02% of examined samples (145/1447). The larvae were identified as T. spiralis (11.03%), T. britovi (71.72%), and T. pseudospiralis (0.69%). No mixed infection was observed. The prevalence of infection varied between years and different voivodeships of the country. Our findings confirm that red foxes are involved in the maintenance of Trichinella spp. in the sylvatic cycle in Poland.
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