^aThere were three replicate arrays for S-CorNV-Day 5 and CB-CorNV-Day 6 groups, and two replicate arrays for S-CorNV-Day 10 and CB-CorNV-Day 14 groups. Shown are geometric means (±standard deviations) of fold changes of gene expression in each group. ^bOnly one array produced a valid fold change for this gene in this group. To get a valid fold change for each array, both the experimental sample and the control sample were required to give valid signals after normalization of the raw signals. Failing to obtain an effective signal for a specific gene in any sample lead to the absence of a fold change in that array. ^cNA, not available. In the dual fluorescence microarray format, an actual ratio will not be available when the signal for either the control or experimental sample is classified as undetectable, even if the signal for its component was apparently much higher or lower. Without exception, all NAs in this table were derived because control samples in all arrays in a group gave values below the threshold of detection after standardization.