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. 2013 Sep 4;8(9):e72530. doi: 10.1371/journal.pone.0072530

Figure 7. HI assay.

Figure 7

Serum samples from immunized chickens before challenge collected at day 20 (MDA-) or 21 (MDA+) after vaccination with chNDVFHN PMV8H5 were tested for NDV (A), APMV-8 (B) and AIV H5 (C) specific antibodies by HI test. Furthermore, serum samples of MDA- chickens and MDA+ chickens vaccinated at day one (MDA+a) or day 7 (MDA+b) after hatch, taken 14 dpch were tested for AIV H5 (D) specific antibodies by HI assay. The number of animals considered seropositive (HI titer > 2 log2) is given below box plots. Significant differences (P < 0.05) between C and D are marked by *.