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. 2013 Oct 28;44(1):102. doi: 10.1186/1297-9716-44-102

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Copyright © 2013 Andraud 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/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Experimental design of the transmission experiment. Inoculated and susceptible animals are represented by red circles and green triangles, respectively. Rooms 1 to 3 contained two pens housing 3 inoculated (red circles) and three susceptible contact pigs (green triangles) and were used to assess transmission by direct contact between animals as well as transmission via the environment. Rooms 4 to 6 were dedicated to the study of the transmission between animals in two adjacent pens separated by 10 cm. One negative control group was housed in room 0.