Which dermal exposure is most serious?

• A. Pesticide mixed with water staying on the skin surface
• B. Pesticide mixed with oil crossing the skin barrier into the bloodstream
• C. Pesticide powder on skin
• D. Pesticide residue on gloves

Answer: (B)

The main idea is how well a pesticide can cross the skin and get into the bloodstream. Oil-based formulations act as carriers that dissolve in skin lipids and help the chemical move through the skin barrier into the bloodstream, making this kind of dermal exposure capable of systemic toxicity. That means it can affect the whole body rather than just the skin.

In contrast, a pesticide mixed with water that stays on the skin surface is less likely to be absorbed quickly; it can wash off or remain on the surface, leading to lower systemic exposure. Pesticide powder on the skin can cause irritation or become a dust hazard if inhaled, but the skin’s absorption from dry powder isn’t as efficient as from an oil-based liquid. Residue on gloves matters, but it typically poses less immediate dermal absorption risk to the skin unless there’s contact with the skin or breakthrough of glove integrity.

So, the scenario where oil-based pesticide penetrates the skin and reaches the bloodstream represents the greatest potential for serious dermal exposure.