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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 cross section of the eggshells from laying hens at different times post inoculation with H9N2 AIV. Representative scanning electron microscopy photograph of the cross section of the eggshell in the control group (A) and AIV-infected group at 1~7 dpi (B–F) as well as analysis of the eggshell thickness (G) in laying hens at the indicated days post inoculation with AIV. Columns and vertical bars represent the mean ± SEM from five independent experiments. Bars with different superscript letters represent a significant difference (P < 0.05). Scale bar = 100 µm.