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Toxoplasma gondii seroprevalence in wild boars (Sus scrofa) in Sweden and evaluation of ELISA test performance

  • C. WALLANDER (a1), J. FRÖSSLING (a2) (a3), I. VÅGSHOLM (a1), A. UGGLA (a1) and A. LUNDÉN (a1) (a4)...
Summary

Toxoplasma gondii is a zoonotic protozoan parasite, infecting a wide range of warm-blooded animals. The Swedish wild boar population is expanding and increased hunting provides its meat to a growing group of consumers. We performed a spatio-temporal investigation of T. gondii seroprevalence in Swedish wild boars. An ELISA was set up and evaluated against a commercial direct agglutination test, using Bayesian latent class analysis. The ELISA sensitivity and specificity were estimated to 79% and 85%, respectively. Of 1327 serum samples, 50% were positive. Thirty-four per cent of young wild boars and 55% of adults were positive (P < 0·001). The total seroprevalence ranged from 72% in 2005 to 38% in 2011 (P < 0·001), suggesting a declining trend. The highest seroprevalence, 65%, was recorded in South Sweden. In other regions it varied from 29% in Stockholm to 46% in East Middle Sweden.

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Copyright
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Corresponding author
* Author for correspondence: Ms. C. Wallander, Swedish University of Agricultural Sciences, Department of Biomedical Sciences and Veterinary Public Health, Box 7036, 750 07 Uppsala, Sweden. (Email: camilla.gustafsson@slu.se)
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