Type I and III IFN expression in differentiated NHBE and NSBE cells.

<p>NHBE (black bars) or NSBE (white bars) cells that reached a well-differentiated state were infected at a MOI of 0.01 with the indicated viruses. At 8 (top panel) and 24 (bottom panel) HPI RNA was harvested and levels of type I and III IFN genes were quantified by qRT-PCR. Results are expressed as fold over mock infected cells and normalized to a housekeeping gene. Significant differences in gene expression between human and swine cells are indicated by * and determined as described in the Material and Methods.