Exposure while applying industrial antimicrobial pesticides

Area of Science:

• Occupational Health
• Environmental Science
• Toxicology

Background:

• Industrial antimicrobial pesticides are widely used.
• Understanding chemical exposure routes is crucial for worker safety.
• Previous studies often focused on agricultural pesticides.

Purpose of the Study:

• To quantify dermal and inhalation exposure during industrial pesticide application.
• To compare exposure levels across different application methods (pouring liquids, pumping liquids, pouring solids).
• To assess the impact of personal protective equipment, specifically gloves.

Main Methods:

• Forty-three exposure assessments were conducted.
• Inhalation exposure was measured using personal air samples.
• Dermal exposure was assessed using gauze dosimeters placed inside and outside work clothing.
• Exposure data were compared to calculated maximum credible doses.

Main Results:

• Inhalation exposure was typically below detection limits.
• Measurable dermal exposure was consistently detected on applicators.
• Dermal doses varied significantly, with median measured doses between 30% and 70% of maximum credible doses.
• Mean measurable dose rates ranged from 3 to 10 mg/hr depending on application method.
• Glove wearers had significantly lower hand exposure (155- to 290-fold reduction).
• Dermal exposure exceeded inhalation exposure by 5X to 100X.

Conclusions:

• The dermal route is the primary exposure pathway for industrial pesticides.
• Application methods and work practices influence dermal exposure levels.
• The use of gloves is highly effective in reducing hand exposure.
• Further research may be needed to refine exposure models and control strategies.