Analysis of the epidemiological factors influencing vulpine trichinellosis in ecologically different regions of Slovakia.

Introduction: In the Slovak Republic, trichinellosis circulates almost exclusively in the sylvatic cycle, with main reservoir host red fox and wild boar and sporadic occurrence of human outbreaks. A detailed study was performed in five ecologically different regions of eastern Slovakia with more profound regard to eco-geographical and anthropogenic influences to natural fox habitat.

Material And Methods: In total of 689 red foxes (Vulpes vulpes) hunted in selected regions in 2005/2006 was examined using artificial digestion method. Larvae obtained from infected samples were on the species level characterised using multiplex PCR analysis.

Results: The study revealed a total prevalence of 15.6%, with most frequent occurrence of infected foxes in the mountain of the Volovské Vrchy (25.2%) where both human habitation and fox population are very dense. High prevalence rates were found in the Kosická Kotlina Basin (19.6%) with urbanised landscape, concentrated human activities and low fox population and in national park of the High Tatras (15.8%) where the inhabitants and fox population are relatively low. In the remote localities of the Nízke Beskydy Highlands that represent ideal fox habitat free of any human impact, 14.2% of foxes harboured Trichinella larvae. The lowest occurrence of infected foxes (6.9%) was found in agrarian areas of the Východoslovenská Nizina Lowland, with relatively low inhabitants and fox population density. In all localities Trichinella britovi was the most important etiological agent of sylvatic trichinellosis.