What sign is commonly associated with insecticide poisoning?

Miosis, or constricted pupils, is a classic sign associated with insecticide poisoning, particularly with exposure to organophosphate and carbamate pesticides. These agents inhibit acetylcholinesterase, an enzyme responsible for breaking down acetylcholine in the body. When acetylcholine accumulates due to this inhibition, it causes overstimulation of the parasympathetic nervous system, leading to signs like miosis, along with other symptoms such as salivation, lacrimation, urination, diarrhea, gastrointestinal distress, and muscle twitching.

In contrast, conditions such as dry skin, hypertension, and bradycardia are not typically associated with insecticide poisoning. Dry skin may occur in certain types of poisoning or dehydration but is not a hallmark sign of insecticide exposure. Hypertension is more commonly linked to sympathomimetic agents rather than the cholinergic symptoms caused by insecticides. Bradycardia is often associated with vagal stimulation, which can occur in the presence of excessive cholinergic activity, but miosis is a more specific and recognized sign of insecticide poisoning.