Photomicrographs from a wild turkey found dead in Minnesota

Photomicrographs from a wild turkey (Meleagris gallopavo) found dead in Minnesota, USA.  (A) The normal epithelium becomes markedly thickened due to hyperplasia of the stratum spinosum (left to right) with regions of ulceration and crusting (arrow). H&E stain.  (B) Epithelial cells in hyperplastic regions are multifocally swollen (vacuolar degeneration) (arrows), and there is serocellular crusting over the surface (*). H&E stain. (C) Some epithelial cells contain eosinophilic intracytoplasmic inclusion bodies (Bollinger bodies) (arrowheads). H&E stain.