Trichinella spp. biomass has increased in raccoon dogs (Nyctereutes procyonoides) and red foxes (Vulpes vulpes) in Estonia

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Kärssin , A , Häkkinen , L , Niin , E , Peik , K , Vilem , A , Jokelainen , P & Lassen , B 2017 , ' Trichinella spp. biomass has increased in raccoon dogs (Nyctereutes procyonoides) and red foxes (Vulpes vulpes) in Estonia ' , Parasites & vectors , vol. 10 , 609 . https://doi.org/10.1186/s13071-017-2571-0

Title: Trichinella spp. biomass has increased in raccoon dogs (Nyctereutes procyonoides) and red foxes (Vulpes vulpes) in Estonia
Author: Kärssin, Age; Häkkinen, Liidia; Niin, Enel; Peik, Katrin; Vilem, Annika; Jokelainen, Pikka; Lassen, Brian
Other contributor: University of Helsinki, Veterinary Pathology and Parasitology

Date: 2017-12-16
Language: eng
Number of pages: 12
Belongs to series: Parasites & vectors
ISSN: 1756-3305
DOI: https://doi.org/10.1186/s13071-017-2571-0
URI: http://hdl.handle.net/10138/232783
Abstract: Background: Raccoon dogs and red foxes are well-adapted hosts for Trichinella spp. The aims of this study were to estimate Trichinella infection prevalence and biomass and to investigate which Trichinella species circulated in these indicator hosts in Estonia. Methods: From material collected for evaluating the effectiveness of oral vaccination program for rabies eradication in wildlife, samples from 113 raccoon dogs and 87 red foxes were included in this study. From each animal, 20 g of masseter muscle tissue was tested for the presence of Trichinella larvae using an artificial digestion method. The Trichinella larvae were identified to species level by multiplex polymerase chain reaction method. Results: The majority of tested animals were infected with Trichinella spp. The parasite species identified were T. nativa and T. britovi. The apparent infection prevalence was 57.5% in raccoon dogs and 69.0% in red foxes, which were higher than previous estimates. In addition, the larval burden had also increased in both hosts. We estimated that in 2011-2012, the Trichinella spp. biomass was more than 15 times higher in raccoon dogs and almost two times higher in red foxes than in 1992-2000 (based on mean larval burden), and almost 20 times higher in raccoon dogs and almost five times higher in red foxes than in 2000-2002 (based on median larval burden). Conclusions: Raccoon dogs and red foxes are relevant reservoirs for Trichinella spp. in Estonia. The biomass of Trichinella circulating in sylvatic cycles was substantial and had increased: there is substantial infection pressure in the sylvatic cycle.
Subject: Trichinella infection
Trichinella nativa
Trichinella britovi
Prevalence
Sylvatic
Zoonosis
BOAR SUS-SCROFA
SPATIAL-DISTRIBUTION
BRITOVI INFECTION
WILD CARNIVORES
ITALIAN ALPS
SPIRALIS
PREVALENCE
EPIDEMIOLOGY
TRICHINOSIS
ANIMALS
413 Veterinary science
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