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. 2014 Apr 25;7:199. doi: 10.1186/1756-3305-7-199

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Copyright © 2014 Feria-Arroyo et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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Geographic area of study. Each county within Texas, Tamaulipas, Nuevo León and Coahuila [72] from which we obtained Ixodes tick samples has been highlighted in gray. The locations of the positive samples for B. burgdorferi are marked with a target sign.