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[Spinach powder-induced exogenous allergic alveolitis]
J Schreiber1, E Müller, W M Becker
1Forschungszentrum Borstel, Medizinische Klinik.
Pneumologie (Stuttgart, Germany)
|April 16, 1998
Summary
Hypersensitivity pneumonitis can be caused by spinach powder, a food dye. Diagnosis involves specific antibodies and positive exposure tests, leading to severe respiratory symptoms.
Area of Science:
- Occupational and environmental medicine
- Immunology
- Pulmonary medicine
Background:
- Hypersensitivity pneumonitis (HP) is an immune-mediated lung disease.
- Exposure to inhaled antigens can trigger HP in susceptible individuals.
- Spinach powder is used as a natural food dye and potential allergen.
Observation:
- A 51-year-old woman presented with symptoms suggestive of HP.
- She had occupational exposure to spinach powder.
- Clinical presentation included fever, dyspnea, and significant drop in arterial pO2.
Findings:
- Diagnosis of HP was confirmed by IgG2 antibodies to spinach extract and a positive exposure test.
- Pulmonary function tests revealed severe restrictive impairment and reduced diffusion capacity.
- Biomarkers showed elevated leukocytes, TNF-alpha, IL-6, and soluble IL2-receptor.
- Bronchoalveolar lavage indicated increased neutrophils, and lung biopsy showed interstitial infiltrates and granuloma.
Implications:
- This case highlights spinach powder as a novel antigen causing HP.
- Early diagnosis and antigen avoidance are crucial for managing HP.
- Understanding immune responses to food-derived allergens can inform prevention strategies.