How is acute exposure to a pesticide typically characterized?

Acute exposure to a pesticide is characterized by limited and singular contact. This type of exposure typically occurs when an individual experiences a one-time event of significant pesticide exposure, which might happen during a specific instance, such as a mishap during application or spill.

In contrast, chronic exposure refers to ongoing contact over an extended period, which would be more aligned with option A, and is not indicative of acute exposure. While extreme exposure levels could be a factor in acute cases, it is not a defining characteristic, as the essence of acute exposure is the singularity of the event rather than just the severity of the exposure. Casual and infrequent contact would suggest a lack of immediate or significant adverse effects, further differentiating it from the immediate effects often associated with acute exposure. Therefore, the focus on 'limited and singular contact' accurately captures the nature of acute pesticide exposure.