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Endotoxins in the agricultural environment.

Authors
Olenchock-SA; May-JJ; Pratt-DS; Morey-PR
Source
Am J Ind Med 1986 Sep; 10(3):323-324
NIOSHTIC No.
00163807
Abstract
A study of endotoxins in dusts from silos was conducted. Airborne dusts generated during removal of the cap of moldy silage from silos were analyzed for Gram negative bacterial endotoxins. The dusts were fractionated and endotoxins in each size fraction were determined. Bulk silage samples were also analyzed. Endotoxin concentrations in respirable dust samples from two silos were 46.4 and 5.4 nanograms per milligram (ng/mg). Corresponding endotoxin concentrations in the total dust samples were 87.3 and 8.8ng/mg. Mean airborne endotoxin concentrations in the respirable dust fraction from the same two silos were 1.32 and 0.05 micrograms per cubic meter (microg/m3), respectively. Total airborne endotoxin concentrations were 8.85 and 0.12microg/m3, respectively. Mean airborne endotoxin concentrations in fractionated dust samples from five silos ranged from approximately 2 nanograms per cubic meter (ng/m3) for the smallest particle size to about 400ng/m3 for the largest size particles. Endotoxin concentrations in bulk silages ranged from 0.06 to 32.0ng/mg. The authors conclude that Gram negative bacterial endotoxins occur in silage and its related airborne dust. They are found in both respirable and total dust fractions, and in all particle sizes. During silo unloading operations, airborne endotoxins have the potential to reach all areas of the respiratory system where they can initiate or exacerbate pathophysiologic responses.
Keywords
NIOSH-Author; Organic-dusts; Airborne-dusts; Molds; Toxins; Plant-dusts; Plant-substances; Agriculture; Bacterial-dusts; Microorganisms
CODEN
AJIMD8
Publication Date
19860901
Document Type
Journal Article
Fiscal Year
1986
NTIS Accession No.
NTIS Price
Issue of Publication
3
ISSN
0271-3586
Source Name
American Journal of Industrial Medicine
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