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. 2015 Oct 20;11:267. doi: 10.1186/s12917-015-0564-9

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© Barrett et al. 2015

Open AccessThis 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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — County-level herd SBV prevalence, and the spatial distribution of herds positive to SBV, based on active surveillance. The colour and size of each dot refers to the number of animals per farm that were positive to SBV. a During November 2012–January 2013. b During June–August 2013. c During October–November 2013