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Gross lesions in kidney and trachea from dead chickens. (A) Swollen and pale kidney after challenging with strain CK/CH/JS/TAHY. (B) Negative control kidney. (C) Trachea illustrating hyperemia and serious catarrhal exudates after challenge with strain CK/CH/JS/TAHY. (D) Control trachea. Inset shows trachea's mucosal surface.
