IFNA1 and infection: To determine the difference in IFN-inducing activity between RIG-I from waterfowl and pigeon, DF-1 cells were transfected with EGFP-tagged plasmids including ppCARDs-EGFP, pdCARDs-EGFP, pgCARDs-EGFP, ppRIG-I-EGFP, pdRIG-I-EGFP, pgRIG-I-EGFP, and pEGFP-N1, which was followed by infection with ZB07, IBDV TS/CJ-801 or mock-treatment.