Histopathology of kidney of the freshwater fish mystus vittatus exposed to cadmium

Mystus vittatus was exposed (10% sublethal concentration of 96 hr LC50) for a period of 10, 20 and 30 days under laboratory conditions. The kidney of the treated fishes were examined under microscope and noticed significant changes such as enlargement renal tubules hyperplasia, vaculation of the epithelial cells of renal tubules, necrosis and shrinkage of glomeruli. Results suggests that a comparatively low concentration cadmium is enough to elicit pathological changes in Mystus vittatus.