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  • Title: Aspergillus candidus: a respiratory hazard associated with grain dust.
    Author: Krysinska-Traczyk E, Dutkiewicz J.
    Journal: Ann Agric Environ Med; 2000; 7(2):101-9. PubMed ID: 11153039.
    Abstract:
    The concentration of Aspergillus candidus in samples of grain dust and of air polluted with grain dust was found to be large (respectively 3.0 x 10(5) - 3.0 x 10(9) cfu/g and 5.0 x 10(3) - 6.47 x 10(5) cfu/m(3)) and proved to be significantly greater compared to samples of other organic dusts (p<0.001). Rabbits exposed to long-term inhalation of the cell extract of A. candidus revealed a positive cellular and humoral response, demonstrated by the significant (p<0.01) inhibition of leukocyte migration in the presence of specific antigen and by production of precipitins against antigen of the fungus. The inhibition of leukocyte migration was even stronger in another group of rabbits exposed twice to the inhalation of live A. candidus spores. A group of grain workers reacted significantly more frequently to extract of A. candidus in the leukocyte migration inhibition test (p<0.01) and precipitation test (p<0.05), compared to the control group not exposed to organic dusts. It was concluded that Aspergillus candidus, because of its common occurrence and strong immunomodulating properties, poses an important occupational hazard for grain handling workers
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