Wyoming Pesticide Applicator Certification Practice Test

How is chronic toxicity from pesticides typically caused?

1. Single high-dose exposure

2. Repetitive low-dose exposure over time

3. Inhalation of large pesticide particles

4. Dermal exposure to concentrated pesticides

The correct answer is: Repetitive low-dose exposure over time

Chronic toxicity from pesticides is typically caused by repetitive low-dose exposure over time. This is because exposure to small amounts of pesticides on a regular basis can build up in the body and lead to long-term health effects. Option A (single high-dose exposure) would not typically lead to chronic toxicity as the body may be able to detoxify and eliminate the pesticides before they cause harm. Option C (inhalation of large pesticide particles) is more likely to cause acute toxicity, such as respiratory irritation, but not chronic toxicity. Option D (dermal exposure to concentrated pesticides) may also lead to acute toxicity, but not necessarily chronic toxicity unless there is continual exposure over time. Therefore, option B is the most accurate answer as it aligns with the typical mechanisms of chronic toxicity from pesticide exposure.