Pesticide Applicator Training General Standards SP39-W Practice Test

Severe poisoning shows itself when the nervous system is overwhelmed and the person also struggles to breathe. The combination of pinpoint pupils, muscle twitching, and trouble breathing is a clear signal of high-level pesticide exposure affecting both the muscarinic and nicotinic parts of the nervous system, plus the respiratory system. Pinpoint pupils come from parasympathetic overstimulation, muscle twitching reflects skeletal muscle stimulation, and difficulty breathing indicates bronchoconstriction and possible respiratory weakness. This set of signs means a life-threatening situation requiring immediate medical help. In contrast, fatigue, headache, and dizziness can occur with many situations and don’t alone indicate severe poisoning. If safe to do so, move the person to fresh air, remove contaminated clothing, and seek emergency assistance right away.