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. 2015 Apr 20;10(4):e0124992. doi: 10.1371/journal.pone.0124992

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Fig 3 — Sera from CEF control group (n = 10), parental HVT group (n = 10) and rHVT-pmpD-N group (n = 15) were analyzed by ELISA assay for anti-PmpD-N antibody using plates coated with PmpD-N as the antigens as described in material and method section. Results are expressed as absorbance at 450nm/630nm. A serum sample was considered positive when its OD value exceeded 0.045. The values were shown as means ± standard deviation. ** Indicates P < 0.01 when rHVT-pmpD-N & parental HVT group or CEF control group.