Plaque phenotype: Plaque sizes of W

Plaque phenotype: Plaque sizes of WT and mCherry- or GFP-expressing IBVs in MDCK cells were evaluated 3 days post-infection by immunostaining (top) using a MAb
against IBV NP (B017) or by red and green fluorescence. White arrows indicate correlation between NP positive and fluorescent (mCherry or GFP) plaques