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. 2015 Oct 13;115:527–534. doi: 10.1007/s00436-015-4768-5

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© The Author(s) 2015

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — Collection sites and SBV findings during the various collection years. 1, 2011; 2, 2012; 3, 2013; 4, 2014; 5, 2011–2013; 6, 2011 + 2012; 7, 2011 + 2013; 8, 2012 + 2013; negative for SBV (enclosed in circle), positive for SBV (enclosed in square)