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Occupational hypersensitivity pneumonitis caused by fossil-containing rocks
Alicia Armentia1, Sara Fernández1, Angel San Miguel Rodríguez2
1Allergy Unit, Hospital Universitario Río Hortega. Valladolid, Spain.
Clinica Chimica Acta; International Journal of Clinical Chemistry
|November 14, 2021
Summary
Inhalation of fossil soil containing bivalve fossils can cause hypersensitivity pneumonitis in tile industry workers. This immune response is linked to sensitization to mollusk proteins found in the ancient soil.
Area of Science:
- Environmental Medicine
- Immunology
- Paleontology
Background:
- Tile manufacturing utilizes fossil soils, which can contain ancient biological remnants.
- Occupational exposure to these soils may pose respiratory health risks.
Purpose of the Study:
- To investigate a case of hypersensitivity pneumonitis linked to fossil soil inhalation.
- To identify the specific antigens responsible for the immune response.
Main Methods:
- Diagnostic workup for pneumonitis including imaging and biopsy.
- Biochemical analysis of soil and polishing materials.
- Allergy testing, including skin tests and IgE-based assays with soil and mollusk extracts.
- Histological examination using scanning electron microscopy.
Main Results:
- The patient presented with pneumonitis attributed to inhalation of paleosol containing Cretaceous bivalves (Hippurites).
- Immunoblotting confirmed IgE sensitization to proteins in the fossil soil extracts, specifically between 66-35 kDa.
- Further assays demonstrated IgE binding to extracts from various bivalve and gastropod mollusks, confirming mollusk sensitization.
Conclusions:
- Proteins from bivalves preserved in fossil soils can elicit an immune hypersensitivity response.
- This finding highlights the need for protective measures for workers handling such materials, including fossil soil cutters and polishers.
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