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Related Experiment Videos

[Occupational asthma caused by isocyanates].

D Lauwers1, P Pierard, J Thiriaux

  • 1Hôpital Civil de Charleroi, Belgique.

Allergie Et Immunologie
|October 1, 1992
PubMed
Summary

The percentage of workers with positive specific IgE tests for isocyanates reflects workplace exposure levels. Monitoring these antibody levels can be a valuable alternative to measuring airborne isocyanate concentrations.

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Area of Science:

  • Occupational Health
  • Immunology
  • Industrial Hygiene

Context:

  • Isocyanates are widely used industrial chemicals linked to respiratory sensitization.
  • Assessing worker exposure and sensitization is crucial for occupational health management.
  • Traditional methods like air monitoring may not fully capture individual exposure risks.

Purpose:

  • To determine if the prevalence of positive RAST (Radioallergosorbent Test) for isocyanates correlates with worker exposure.
  • To evaluate the utility of specific IgE measurements as a biomarker for isocyanate exposure.
  • To investigate factors influencing the accuracy of specific IgE testing in an occupational setting.

Summary:

  • This study assessed specific IgE levels against isocyanates in 199 workers across ten companies, using RAST-ELISA and RAST-RIA methods.
  • Results indicated that the proportion of positive RAST tests varied between organizations, correlating with exposure type and intensity.
  • Improved working conditions and reduced airborne concentrations led to a decrease in positive RAST results over time, with no positives found in a reference group.

Impact:

  • Specific IgE measurement offers a potentially useful alternative to ambient concentration monitoring for tracking isocyanate-exposed workers.
  • Findings suggest that immunological monitoring can provide insights into the effectiveness of workplace exposure controls.
  • The study highlights the importance of standardized sample handling for reliable IgE testing in occupational health surveillance.

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