Microbiological analyses and inflammatory effects of settled dusts from rice and hay.

Details

• Personal Author:
  Lewis, Daniel M. ; Olenchock SA ; Shen Y-E ; Sorenson WG
• Description:
  Fourteen samples of settled dust from two factories processing rice and wheat straw near Shanghai, China, were examined by dilution plating for total bacteria, gram-negative bacteria, thermophilic actinomycetes and fungi. They were also examined for aflatoxin, endotoxin and potential to stimulate production of human interleukin 1B (IL-IB) and to consume complement. The concentrations of total microorganisms were consistently greater than 107 CFU/g and ranged from 107 to 109 CFU/g. In general, the level of microbial contamination was greater in the hay dust samples than in the rice dust samples, with bacteria being the most numerous microorganisms observed followed by molds, thermophilic actinomycetes and yeasts. The predominant fungi were species of Asverrillus, Cladosporium, Penicillium, Trichosporon, and Cryptococcus. No significant levels of aflatoxin were observed and the isolate of A. flavum examined lack significant aflatoxigenic potential. The levels of microorganisms in these samples, the types of organisms found, and the inflammatory mediators such as endotoxin suggest that workers exposed to these dusts may be at risk for respiratory illness.
• Subjects:
  Accidents, Occupational Biochemistry Carcinogens Energy Metabolism Hazardous Substances Occupational Health P-Aminoazobenzene Safety
• Keywords:
  Aerosols Airborne Particles Airborne Particulates Bacteria Dust Exposure Dusts Endotoxins Environmental Exposure Exposure Levels Factory Workers Fungi Microscopic Analysis Organic Dusts Particle Size Particulates Pulmonary System Disorders Respiratory System Disorders Risk Factors Toxic Effects Toxins Work Environment

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• Publisher:
  National Institute for Occupational Safety and Health
• Document Type:
  Text
• Genre:
  Abstract
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DRDS - Division of Respiratory Disease Studies
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  575
• NIOSHTIC Number:
  nn:20056425
• Citation:
  Papers and Proceedings of the Surgeon General's Conference on Agricultural Safety and Health (FarmSafe 2000). Myers ML, Herrick RF, Olenchock SA, Myers JR, Parker, John E., Hard DL, Wilson K, eds. Atlanta, GA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 92-105, 1992 Sep; :575
• Editor(s):
  Myers ML ; Herrick RF ; Olenchock SA ; Myers JR ; Parker, John E. ; Hard DL ; Wilson K
• Federal Fiscal Year:
  1992
• Peer Reviewed:
  False
• Source Full Name:
  Papers and Proceedings of the Surgeon General's Conference on Agricultural Safety and Health (FarmSafe 2000), April 30-May 3, 1991, Des Moines, Iowa
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:b7f533c64ac9215b9b74b19d835b85191b19fb3c386d1acb85f23555f8b942b250989be25f58e1f2c376b5eefab5eee3d0d8ac9bab73a91cf4f641b327c266ca
• Download URL:
  https://stacks.cdc.gov/view/cdc/181783/cdc_181783_DS1.pdf
• File Type:
  [PDF - 55.36 KB ]