Abstract
The case of a man 46 years old who had the Avellis syndrome of chronic process, intoxicated by an agricultural medicine Hollidol (Parathion) was reported. Generally chronic toxic symptom rarely occurs through Parathion. In this case, it is assumed that at first the week action of Parathion slightly suppressed the work of cholinesterase, but after that reactionarily, the action of Parathion had been activated, and the dissolution of acetylcholin had acted to paralyze upon the neuromuscular junction of recurrent nerve and glossopharyngeal nerve.
