Fig. 2

Reduced viral titer of H1N1 and H9N2 influenza viruses in CEF expressing chIFN-γ. Twenty-four hours after transfection with pcDNA-IFN-γ, CEFs were infected with H1N1 and H9N2 virus. Forty-eight hours post infection, MDCK cells were treated with a H1N1- and b H9N2-infected CEF culture supernatants. TCID50 titer was measured by end-point dilution assay. Statistical significance was determined by one-way ANOVA (*P < 0.05, **P < 0.01, and ***P < 0.001)