The present study was undertaken to evaluate the toxic effects of monocrotophos, a widely used organophosphorus
pesticide, on Lamellidens marginalis with a wide battery of biomarkers consisting of AchE inhibition, lipid peroxidation, the
levels of antioxidant enzymes, and histopathological changes. Animals were exposed to monocrotophos (52.36 mg/l) for four
days. Malondialdehyde (MDA) values were measured as index of oxidation while Superoxide dismutase (SOD), Catalase (CAT),
Glutathione s-Transferase (GST), and Glutathione-Reductase (GR) were measured as index of an antioxidant status. After
exposure, a significant reduction of the capability to neutralize radicals was observed.
