Fig. 5From: Toxic effects of an organophosphate pesticide, envoy 50 SC on the histopathological, hematological, and brain acetylcholinesterase activities in stinging catfish (Heteropneustes fossilis)Photomicrographs of gills of Heteropneustes fossilis after 7-day exposure to 0.0075 ppm Envoy 50 SC. a vacuolation and b missing of secondary gill lamellae (a), hyperplasia (b), and clubbing (c) were observedBack to article page