Which two routes of entry are most critical for pesticide exposure?

The two most critical routes of entry for pesticide exposure are dermal and inhalation. Dermal exposure occurs when pesticides come into contact with the skin, which can easily absorb many chemicals, allowing them to enter the bloodstream and potentially cause health effects. This route is especially concerning because individuals may not be aware of contact and thus might not take precautions to protect themselves.

Inhalation, on the other hand, occurs when pesticide particles or vapors are breathed in, leading directly to the respiratory system and allowing for quick absorption into the body. This route is particularly hazardous, as it can result in immediate health effects such as respiratory irritation or systemic toxicity, depending on the chemical properties of the pesticide.

The other options involve routes (like ingestion) that are certainly relevant for pesticide exposure but are not as critical in terms of frequency or potential immediate impact compared to dermal and inhalation exposure. Dermal and inhalation pathways are often more prevalent for those who handle pesticides regularly, making them the focal points for safety measures and health assessments.