Histologic changes inthe lungs of WT and B17 TG mice after OVA challenge. Sections of lung tissue were stained with H&E. Infiltration of inflammatory cells was more severe in TG mice than in WT mice (upper panels). Scale bar = 100 μm. Eosinophils (arrowheads) accumulated in greater number in peribronchial regions in TG mice compared with WT mice (lower panels). Scale bar = 20 μm.