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. 2016 May 9;47:53. doi: 10.1186/s13567-016-0337-x

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© Lin 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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Concentrations of IFN-γ (A) and TNF-α (B) in lungs of mice infected with r-06 ( ) and r-06/NA2 ( ) strains. Concentrations of cytokines were determined via ELISA in lung supernatants taken from different days after infection. The results are expressed in terms of pg/g. *P < 0.05 indicates a significant difference for r-06 group compared with r-06/NA2 group. ^# P < 0.05, ^## P < 0.01, or ^### P < 0.005 indicates a significant difference between the infected groups and the PBS control group.

Inline graphic — Concentrations of IFN-γ (A) and TNF-α (B) in lungs of mice infected with r-06 ( ) and r-06/NA2 ( ) strains. Concentrations of cytokines were determined via ELISA in lung supernatants taken from different days after infection. The results are expressed in terms of pg/g. *P < 0.05 indicates a significant difference for r-06 group compared with r-06/NA2 group. ^# P < 0.05, ^## P < 0.01, or ^### P < 0.005 indicates a significant difference between the infected groups and the PBS control group.