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Parasitology ; 143(5): 557-67, 2016 Apr.
Article in English | MEDLINE | ID: mdl-26928081

ABSTRACT

The aim of this study was to assess the seroprevalence of the Toxoplasma gondii parasite in pork produced in France, and to determine infection risk factors. An innovative survey was designed based on annual numbers of slaughtered pigs from intensive and outdoor farms in France. A total of 1549 samples of cardiac fluids were collected from pig hearts to determine seroprevalence using a Modified Agglutination Test. Of those, 160 hearts were bio-assayed in mice to isolate live parasites. The overall seroprevalence among fattening pigs was 2·9%. The adjusted seroprevalence in pigs from intensive farms was 3·0%; the highest in sows (13·4%); 2·9% in fattening pigs and 2·6% in piglets. Adjusted seroprevalence in fattening animals from outdoor farms was 6·3%. Strains were isolated from 41 animals and all were genotyped by Restriction Fragment Length Polymorphism as type II. Risk-factor analysis showed that the risk of infection was more than three times higher for outdoor pigs, and that sows' risk was almost five times higher than that of fattening animals. This study provides further evidence of extensive pork infection with T. gondii regardless of breeding systems, indicating that farm conditions are still insufficient to guarantee 'Toxoplasma-free pork'.


Subject(s)
Meat/parasitology , Swine Diseases/epidemiology , Toxoplasmosis, Animal/epidemiology , Age Factors , Animals , Antibodies, Protozoan/blood , Breeding/methods , Cross-Sectional Studies , France/epidemiology , Risk Factors , Seroepidemiologic Studies , Swine , Swine Diseases/parasitology , Toxoplasma/immunology , Toxoplasma/isolation & purification
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