Figure 1From: Molecular characterization of H3N2 influenza A viruses isolated from Ontario swine in 2011 and 2012 Within-herd prevalence of positive samples for influenza virus during testing of individual samples by virus isolation in Madin-Darby canine kidney (MDCK) cells, and during testing of 3:1 pools of nasal swabs on real-time reverse transcription (rtRT)-PCR in Ontario swine herds during 2011-2012. Back to article page