Asian Journal of Research in Zoology

Organophosphate pesticides (OPPs) are among the most widely applied agrochemicals globally, yet their persistence and toxicity raise major concerns for both environmental and human health. This study investigates the acute and chronic toxic effects of four major organophosphate pesticides namely monocrotophos, dimethoate, phorate, and methyl parathion in albino rats (Rattus norvegicus). Biochemical, clinical and histopathological analyses were carried out to assess hepatotoxicity, neurotoxicity, renal dysfunction and reproductive system impairments. The results indicate that OPPs cause dose-dependent acetylcholinesterase inhibition, oxidative stress and significant neurological manifestations. Findings emphasize the urgent need for regulatory restrictions and bioremediation strategies to mitigate OPP residues in agricultural soils. This study conclusively establishes that organophosphate pesticides exert multi-organ toxicity through interrelated biochemical and oxidative mechanisms, primarily centered on acetylcholinesterase inhibition and oxidative stress induction. The uniformity of findings across behavioral, biochemical and histopathological domains validates the albino rat as a dependable experimental model for assessing human health risks associated with organophosphate exposure. It underscores the necessity of integrating toxicological data into agricultural management and regulatory frameworks to minimize pesticide-related morbidity and mortality. Furthermore, the findings advocate for a transition toward sustainable pest management strategies, such as biopesticides and integrated pest management (IPM), which offer effective pest control while reducing ecological harm. The overall conclusion reaffirms that organophosphate toxicity is a preventable but persistent threat.