About
Interday or intraday high-intensity inhalation exposures (i.e., exposure peaks) may be relevant for initiating beryllium sensitization (BeS); such exposures may exceed a threshold necessary to activate the immune response. Other routes of exposure (i.e., skin exposure) and physicochemical characteristics (i.e., the chemical form of beryllium) may also be relevant for developing BeS. In this presentation, risk factors associated with BeS will be summarized to inform the prevention of sensitization.
NIOSH conducted a study of workers employed at a primary beryllium manufacturing facility. In this study, the investigators created a range of qualitative and quantitative peak inhalation metrics and skin exposure indices using: personal full-shift beryllium exposure measurements, 15 minutes to 24 hours process-specific, task and area measurements, glove measurements as an indicator of skin exposure, form of beryllium, process-upset information gleaned from historical reports and self-reported information on exposure events. Hierarchical clustering was conducted to systematically group participants based on similarity of patterns of 16 exposure variables. The associations of the exposure metrics with BeS and self-reported skin symptoms were evaluated using correlation analysis, log-binomial and logistic regression models.
A high degree of correlation existed among the various metrics of peak exposures. Metrics of peak inhalation exposure, indices of skin exposure, and use of material containing beryllium salts were significantly associated with skin symptoms and BeS; skin symptoms were a strong predictor of BeS. However, the independent effects of skin exposure and inhalation exposure on BeS could not be separated as both of these exposures occurred simultaneously and were highly correlated. Hierarchical clustering identified groups of participants with unique patterns of exposure characteristics resulting in different prevalence of BeS and skin symptoms. A cluster…
The talk
Credits and licence
- Institution
- CERN
- Speaker
- M. Abbas Virji
- Year
- 2026
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
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