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  • Title: Genetic characterization of Toxoplasma gondii from wild boar (Sus scrofa) in France.
    Author: Richomme C, Aubert D, Gilot-Fromont E, Ajzenberg D, Mercier A, Ducrot C, Ferté H, Delorme D, Villena I.
    Journal: Vet Parasitol; 2009 Oct 14; 164(2-4):296-300. PubMed ID: 19592170.
    Abstract:
    Toxoplasma gondii strains isolated from domestic animals and humans have been classified into three clonal lineages types I-III, with differences in terms of pathogenicity to mice. Much less is known on T. gondii genotypes in wild animals. In this report, genotypes of T. gondii isolated from wild boar (Sus scrofa) in France are described. During the hunting seasons 2002-2008, sera and tissues of individuals from two French regions, one continental and one insular, were tested for Toxoplasma infection. Antibodies to T. gondii were found in 26 (17.6%) of 148 wild boars using the modified agglutination test (MAT, positivity threshold: 1:24). Seroprevalence was 45.9% when considering a threshold of 1:6. Hearts of individuals with a positive agglutination (starting dilution 1:6) (n=60) were bioassayed in mice for isolation of viable T. gondii. In total, 21 isolates of T. gondii were obtained. Genotyping of the isolates using 3 PCR-restriction fragment length polymorphism markers (SAG1, SAG2 and GRA7) and 6 microsatellite loci analysis (TUB2, TgM-A, W35, B17, B18 and M33) revealed that all belonged to type II lineage. These results underline that wild boar may serve as an important reservoir for transmission of T. gondii, and that strains present in wildlife may not be different from strains from the domestic environment.
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