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Related Experiment Videos

Aflatoxin related occupational exposure to maize processing workers.

M R Desai1, S K Ghosh

  • 1Microbiology Division, National Institute of Occupational Health, Meghani Nagar, Ahmedabad 380 016, India.

Cellular and Molecular Biology (Noisy-Le-Grand, France)
|August 6, 2003
PubMed
Summary

Airborne fungal communities in a maize processing plant were studied. Aspergillus, particularly Aspergillus flavus, was the dominant mold, with some strains producing aflatoxins.

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Area of Science:

  • Environmental microbiology
  • Industrial hygiene
  • Mycology

Background:

  • Maize processing industries can harbor diverse airborne mycoflora.
  • Assessment of fungal contamination is crucial for occupational health and product safety.

Purpose of the Study:

  • To investigate the environmental mycoflora in a maize processing industry.
  • To identify dominant fungal genera and species, including toxigenic strains.
  • To quantify fungal presence in total and respirable dusts.

Main Methods:

  • Qualitative and quantitative isolation of airborne fungi using Petri-plate exposure, Andersen sampler, Midget impinger, and high-volume samplers.
  • Identification of fungal isolates to the genus and species level.
  • Detection of aflatoxin-producing Aspergillus flavus strains using specific media and Scanning Electron Microscopy (SEM).

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Main Results:

  • Genus Aspergillus was the predominant environmental mycoflora, with Aspergillus flavus being the most common isolate.
  • The Elevator department showed the highest recovery of fungal isolates.
  • Aspergillus accounted for 56.6% of total dust and 44.4% of respirable dust.
  • Aflatoxin-positive strains of Aspergillus flavus constituted 5.65% and 9.73% of total and respirable dust isolates, respectively.

Conclusions:

  • Airborne fungal populations in maize processing facilities are significant, with Aspergillus flavus posing a potential health risk due to aflatoxin production.
  • Effective monitoring and control strategies are necessary to mitigate exposure to toxigenic fungi in industrial environments.