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. 2015 Jun 8;6:581. doi: 10.3389/fmicb.2015.00581

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Copyright © 2015 Li, Lv, Yue, Shi, Wei, Chai and Liu.

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) or licensor 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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The kinetics of IFN-γ and IL-2 in serum of different age ducks infected with DTMUV. (A) IFN-γ levels of serum from all the infected ducks. (B) IL-2 levels of serum from all the infected ducks. The samples of 3-weeks-old ducks were not collected at 15 and 19 dpi. Data are expressed as mean ± SD (n = 3). Each sample was analyzed in triplicate. In each panel, different capital letters mean highly significant difference (P < 0.01), and different small letters mean significant difference (P < 0.05), while no letters mean no significant difference (P > 0.05). Significant differences were calculated by ANOVA with Duncan’s multiple range test.