Figure 8
From: Emergence of Different Recombinant Porcine Reproductive and Respiratory Syndrome Viruses, China
Microscopic lesions examination in lungs of the challenged piglets. (A) shows the thickening of the alveolar septa and a small amount of neutrophil infiltration. (B) shows thickening of the pulmonary alveolar wall, hyperplasia of alveolar epithelial cells, infiltration of monocytes and macrophages and exfoliated epithelial cells infiltrating in the bronchiole. (C) shows that the lung tissue alveolar structure disappeared, infiltration of monocytes, macrophages, neutrophils, and pulmonary parenchymal, and exfoliated epithelial cells infiltrating the bronchiole. (D) The lungs of a control pig. Original magnification.
