PMID: 11906102Mar 22, 2002Paper

Subacute toxicity of anilofos, a new organophosphorus herbicide, in male rats: effect on some physical attributes and acetylcholinesterase activity

Indian Journal of Experimental Biology
A Hazarika, S N Sarkar

Abstract

In acute toxicity study, rats showed dose-dependent signs of cholinergic hyperactivity and behavioural alterations. Maximum intensity of symptoms was not associated with mortality. Oral LD50 was 1681 mg/kg. In subacute toxicity study, rats were orally administered 50, 100 or 200 mg/kg of anilofos once daily for 28 days. Signs and symptoms were observed mainly with 200mg/kg. At this dose, anilofos induced hypothermia and progressive weight loss. None of the anilofos-treated rats died. Weight of brain, lung, testis was not altered, while of liver, heart, spleen and kidney increased. Anilofos inhibited cholinesterase (ChE) activities of erythrocyte (41-67%), plasma (36%), blood (37-64%), brain (63-73%) and liver (28-48%). Total protein was decreased in plasma and liver. Results indicate moderate toxic potential of anilofos in mammals, substantial contribution of CNS-mediated effects in causing anilofos toxicity and no direct relationship between hypothermia and level of ChE inhibition.

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