Aflatoxin in respirable airborne peanut dust

Area of Science:

• Food Science
• Mycology
• Occupational Health

Background:

• Aflatoxins are toxic metabolites produced by certain molds.
• Peanut processing operations can generate dust.
• Potential for aflatoxin contamination in peanut dust is a concern for food safety and worker health.

Purpose of the Study:

• To quantify aflatoxin levels in peanut dust generated during laboratory shelling and pilot handling.
• To assess the relationship between peanut contamination and aflatoxin levels in airborne dust.
• To evaluate potential worker exposure risks during peanut processing.

Main Methods:

• Laboratory shelling and pilot handling of peanuts were performed.
• Air samples were collected from high-dust concentration areas.
• Aflatoxin B1 concentrations in dust and peanuts were measured using quantitative methods.

Main Results:

• No aflatoxin B1 was detected in dust from uncontaminated peanut lots.
• Dust from highly contaminated lots showed significant aflatoxin B1 levels (up to 700 ppb).
• Dust contamination levels were proportional to peanut contamination, with shelling dust at 1/9th and handling dust at 1/2 the peanut levels.

Conclusions:

• Peanut dust generated during shelling and handling can be a significant source of aflatoxin exposure.
• Handling operations appear to reduce dust-bound aflatoxin levels prior to shelling.
• Further investigation into peanut dust exposure during processing of contaminated peanuts is warranted.