Genotyping and pathotyping of diversified strains of infectious bronchitis viruses circulating in Egypt

Figure 2 Histopathology illustration of the trachea and kidney from experimentally infected chickens. A: Trachea (from Group 1) showed subepithelial hemorrhage accompanied with goblet cell activation, inflammatory cells and edema; B: Trachea (from Group 2) with focal aggregation of lymphocytic cells and epithelial desquamation, ulceration accompanied with goblet cell hypertrophy; C: Kidney (from Group 2) showed glomerular edema and glomerulonephritis with extravasation of blood vessels between renal tubules; D: Kidney (from Group 1) with severe necrosis of renal tubules and focal lymphocytic aggregation; E: Trachea of negative control group; F: Kidney of negative control group (H and E, × 20).