Figure 2. HE staining of lung tissue in OVA-sensitized asthmatic group and control group.

A, control group; B, asthmatic group (Original magnification×400). Asthmatic group showed bronchial inflammation that exsisted in the forms of epithelial damage, wall thickening of the tunica mucosa bronchiorum, inflammatory cell infiltration into the lower layer of the mucous membrane and the surrounding bronchus, and accrementition and spasm of airway smooth muscle.