Validation of microarray results by qPCR.

<p>Microarray and qPCR analyses were applied to measure <i>in vivo</i> expression changes between 6 h p.i. and 48 h p.i. for 20 selected <i>A. pleuropneumoniae</i> genes. The log₂ transformed microarray data were plotted against the log₂ transformed qPCR data for correlation analysis.