Figure 2From: Comparative analysis of apoptotic changes in peripheral immune organs and lungs following experimental infection of piglets with highly pathogenic and classical porcine reproductive and respiratory syndrome virusTUNEL assay with lung tissues of piglet during infection. Shown are lung tissue sections from HuN4 strain-infected piglets at 3 DPI (A) and 10 DPI (B) and from CH-1a strain-infected piglets at 3 DPI (C) and 10 DPI (D), respectively. The arrows in A and C show cells undergoing apoptosis were type II pneumocytes, and in B and D were macrophages.Back to article page