Fig. 2.
Histopathological lesions of Johne’s disease, a and b Granulomatous ileitis. Infiltration of epithelioid macrophages are seen in the mucosa. c Mixed granulomatous ileitis: Infiltration of epithelioid macrophages, lymphocytes and plasma cells in the mucosa and submucosa of ileum. d Lymphoplasmacytic enteritis. Diffuse infiltration of lymphocytes and plasma cells in the mucosa and submucosa. e Lymphangiectasia. Lymphatic dilation in the mucosa and submucosa. f Lymphangitis (starisk) and lymphocytic neuritis (arrow). H & E, ileum, goat