Fig. 1From: Immunohistochemical characterization of tuberculous lesions in sheep naturally infected with Mycobacterium bovisBronchial lymph node; immunohistochemical characterization of cellular populations in initial granuloma. (a) Isolated T lymphocytes (arrow) can be observed in the granuloma, bar = 20 μm. (b) A few scattered B lymphocytes are observed in this stage, bar = 20 μm. (c) Abundant immunolabelled macrophages are present, bar = 20 μm. (d) No plasma cells are observed, bar = 20 μmBack to article page