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. 2019 Mar 25;6:84. doi: 10.3389/fvets.2019.00084

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Copyright © 2019 Truong, Doan, Doan Tran, Nguyen, Bach, Rueanghiran, Binot, Goutard, Thwaites, Carrique-Mas and Rushton.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Map of study areas in Dong Thap province. Blue: geographical location of CIs; red: geographical location of participants of Q-sorting interviews; triangle: chicken farmers; circle: meat duck farmers; square: free-grazing duck farmers; rhombus: veterinary drug shop owners; star: government veterinarian/CAHWs.