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. 2017 Aug 18;48:43. doi: 10.1186/s13567-017-0448-z

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© The Author(s) 2017

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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Immunohistochemical detection of antigen uptake following immersion vaccination in gill of trout. Detection of F. psychrophilum antigen in gills: A unvaccinated, B day 2 pv. Brown staining indicates positive staining for antigen. Bar: 50 µm.