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Aflatoxin in respirable corn dust particles

W G Sorenson, J P Simpson, M J Peach

    Journal of Toxicology and Environmental Health
    |March 1, 1981
    PubMed
    Summary
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    Aflatoxins, toxic compounds produced by mold, were found in airborne corn dust. Smaller dust particles contained higher concentrations, suggesting whole grain testing may underestimate exposure risks.

    Area of Science:

    • Agricultural Science
    • Food Safety
    • Environmental Health

    Background:

    • Aflatoxins are toxic metabolites produced by certain molds, posing a significant risk to food safety and human health.
    • Airborne grain dust can be a route of exposure to mycotoxins, including aflatoxins, in agricultural settings.
    • Previous studies have focused on aflatoxin contamination in whole grains, with less attention to airborne dust fractions.

    Purpose of the Study:

    • To investigate the presence and distribution of aflatoxins in airborne grain dust samples.
    • To determine if aflatoxin levels vary with particle size in airborne corn dust.
    • To assess the potential for underestimation of aflatoxin exposure when analyzing whole grain samples.

    Main Methods:

    • Collection and analysis of airborne grain dust samples from various grain types.

    Related Experiment Videos

  • Detection and quantification of aflatoxins, specifically aflatoxin B1, using sensitive analytical techniques.
  • Particle size separation of contaminated corn dust components based on aerodynamic diameter.
  • Analysis of aflatoxin levels in different size fractions of the corn dust.

    • Main Results:

    • Aflatoxins were not detected in most airborne grain dust samples.
    • One corn dust sample contained a significant level of aflatoxin B1 (130 ppb).
    • Aflatoxin concentrations were substantially higher in smaller particle size fractions (7-11 micrometers and <7 micrometers) compared to the bulk sample.

    Conclusions:

    • Airborne corn dust can be a source of aflatoxin exposure.
    • Aflatoxin contamination is not uniformly distributed within airborne corn dust particles; smaller particles harbor higher concentrations.
    • Current methods relying on whole grain analysis may underestimate the actual aflatoxin exposure risk from airborne corn dust aerosols.