Figure 2.

Typical macroscopic and microscopic lesions from bovine. Legend: (a) Lung and lymph node with extensive yellowish caseous necrosis; (b) Lymph node (100x)—a typical tuberculous granuloma with central necrosis, mineralization and multinucleated giant cells; (c) Lung (40x)—intrabronchial granuloma. Note the multinucleated giant cells. Arrow: bronchiolar epithelium; arrowhead: eroded bronchiolar epithelium; (d) Lymph node (100x)—microgranulomas with multinucleated giant cells and epithelioid cells.