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Occupational exposure to inhalable pathogenic microorganisms in waste sorting.

Elke Eriksen1, Anne Mette Madsen2, Anani Komlavi Afanou3

  • 1STAMI, National Institute of Occupational Health, Gydas Vei 8, 0363, Oslo, Norway; Section for Aquatic Biology and Toxicology, Department of Biosciences, Centre for Biogeochemistry in the Anthropocene, University of Oslo, 0316, Oslo, Norway.

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This study identified harmful microorganisms, including pathogens, in the air of waste sorting plants. Exposure to fungi correlated with respiratory symptoms like wheezing in workers.

Keywords:
AspergillusHuman pathogensMALDI-TOF MSMicroorganismsNGSOccupational exposure

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Area of Science:

  • Occupational Health
  • Environmental Microbiology
  • Industrial Hygiene

Background:

  • Waste workers face potential exposure to airborne microorganisms.
  • Identifying microbial hazards is crucial for assessing occupational risks.

Purpose of the Study:

  • To assess airborne microorganisms in waste sorting plants.
  • To identify potential human pathogens and correlate exposure with adverse health outcomes.

Main Methods:

  • Personal inhalable air samples collected over full shifts.
  • Microbial analysis using MALDI-TOF MS and next-generation sequencing (NGS).

Main Results:

  • High concentrations of bacteria (e.g., Bacillus, Staphylococcus) and fungi (e.g., Aspergillus, Penicillium) detected.
  • 15% of species were risk group 2 pathogens; 7% were risk group 1.
  • Correlation found between risk group 1 fungi and worker wheezing.

Conclusions:

  • Combined culture and NGS methods effectively identified diverse microorganisms.
  • Findings contribute to risk assessment for occupational exposure in waste sorting environments.