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Assessing airborne aflatoxin B1 during on-farm grain handling activities.

Authors
Selim-MI; Juchems-AM; Popendorf-W
Source
Am Ind Hyg Assoc J 1998 Apr; 59(4):252-256
NIOSHTIC No.
20023160
Abstract
The presence of aflatoxin in corn and corn dust during relatively normal years and the increased risk of Aspergillus flavus infestation during drought conditions suggest that airborne agricultural exposures should be of considerable concern. Liquid extraction, thin layer chromatography, and high pressure liquid chromatography were used for the analysis of aflatoxin B1 in grain dust and bulk corn samples. A total of 24 samples of airborne dust were collected from 8 farms during harvest, 22 samples from 9 farms during animal feeding, and 14 sets of Andersen samples from 11 farms during bin cleaning. A total of 14 samples of settled dust and 18 samples of bulk corn were also collected and analyzed. The airborne concentration of aflatoxin B1 found in dust collected during harvest and grain unloading ranged from 0.04 to 92 ng/m3. Higher levels of aflatoxin B1 were found in the airborne dust samples collected from enclosed animal feeding buildings (5-421 ng/m3) and during bin cleaning (124-4849 ng/m3). Aflatoxin B1 up to 5100 ng/g were detected in settled dust collected from an enclosed animal feeding building; however, no apparent correlation was found between the airborne concentration of aflatoxin B1 and its concentration in settled dust or bulk corn. The data demonstrate that farmers and farm workers may be exposed to potentially hazardous concentrations of aflatoxin B1, particularly during bin cleaning and animal feeding in enclosed buildings.
Keywords
Airborne-particles; Agriculture; Exposure-levels; Exposure-limits; Sampling; Sampling-methods; Farmers; Grain-dusts; Dust-analysis; Respiratory-function-tests; Molds; Mycotoxins; Fungi; Microorganisms; Agricultural-workers
Contact
Department of Preventive Medicine and Environmental Health, University of Iowa, Iowa City 52242, USA
CODEN
AIHAAP
Publication Date
19980401
Document Type
Journal Article
Funding Amount
420298
Funding Type
Grant
Fiscal Year
1998
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-02857
Issue of Publication
4
ISSN
0002-8894
Source Name
American Industrial Hygiene Association Journal
State
IA; MN; UT
Performing Organization
University of Iowa, Iowa City, Iowa
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