Figure 4

Histological section of the kidney. (a) Macrophotos of the kidney. Whole organ (left column); cross section (right column). Infected kidney (left), control kidney (right). (b) Active specific inflammation of kidney: caseous necrosis (cn); macrophage epithelioid layer (mel); lymphocyte-plasmacyte layer (lpl); connective tissue capsule (ctc). Stained with hematoxylin and eosin (G&E). Scale bar represents 100 μm. (c) Ziehl–Neelsen staining, black arrows show μTB. (d) Specific and interstitial inflammation of the cortex. (e) Distribution of collagen in the medulla, Masson's trichrome stain; (f) Kidney glomeruli. Scale bars represent 300 μm. (g) Renal pelvis. Scale bar represents 100 μm. (d, f and g) stained with G&E. Scale bar represents 300 μm (c–g).