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. 2016 Feb 25;47:35. doi: 10.1186/s13567-016-0322-4

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© Qi et al. 2016

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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Scanning electron microscopy of the inner and outer surface of the eggshells of laying hens at different times post inoculation with AIV. Representative scanning electron microscopy photograph of the outer (A–F) and inner surface (G–L) of the eggshells from the control hens (A, G) and in hens at 1~7 days post inoculation with AIV (B–F, H–L).