What does the term chronic poisoning refer to?

Chronic poisoning refers to the harmful effects resulting from repeated exposure to a substance, typically at low levels, over an extended period. This concept is particularly relevant in the context of pesticides, where individuals may not experience immediate adverse effects but can accumulate harmful levels over time. This accumulation can lead to various health issues, which might not be immediately recognizable but can manifest as chronic health problems down the line.

The other options describe different aspects of pesticide exposure. A single lethal dose pertains to acute poisoning, characterized by immediate and severe symptoms following a significant exposure. Rapid onset of symptoms also aligns with acute poisoning and does not relate to the prolonged effect of chronic exposure. An allergic reaction denotes an immediate hypersensitivity response to a pesticide, which is distinct from chronic poisoning since it does not involve the effects of cumulative, non-lethal exposure over time. Thus, the focus on repeated exposure over an extended timeframe distinctly defines chronic poisoning.