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Improvement of Bacillus subtilis Spore Enumeration and Label Analysis in Flow Cytometry
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A multi-laboratory comparative study of spore trap analyses.

L D Robertson1, Robert Brandys

  • 1Occupational and Environmental Health Consulting Services Inc., 635 Harding Road, Hinsdale, Illinois 60512, USA. ldr@iecinc.net

Mycologia
|October 15, 2010
PubMed
Summary
This summary is machine-generated.

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Fungal spore trap analyses show high variability between laboratories and methods for evaluating fungal bioaerosols. Standardized methods are needed for accurate fungal spore population assessment.

Area of Science:

  • Environmental Science
  • Microbiology
  • Industrial Hygiene

Background:

  • Fungal spore trap analyses are marketed for evaluating fungal bioaerosols in medical and environmental settings.
  • No prior studies have compared results from different laboratories offering these analyses.

Purpose of the Study:

  • To compare results from multiple laboratories using various spore traps across different environmental conditions.
  • To assess the variability and precision of fungal bioaerosol assessments.

Main Methods:

  • Seven laboratories analyzed samples using four different commercial spore trap cassettes.
  • Samples were collected from indoor air under varying agitation levels and outdoor air.

Main Results:

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  • Significant variability was observed in total spore counts and specific spore categories across laboratories and conditions.
  • High agitation indoor air (mean 5154 spores/m³) and outdoor air (mean 16012 spores/m³) showed the highest spore concentrations.
  • No consistent differences in precision were found among the spore trap types.

    • Conclusions:

    • Fungal spore trap analyses should be used cautiously and not as the sole method for assessing fungal populations.
    • Standardized analytical methods are crucial, including data on analytical precision, to improve reliability.