Skin tests with tuberculin (PPD) Candida albicans and Trichophyton spp. in cryptogenic fibrosing alveolitis and asbestos related lung disease

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Abstract
Delayed skin hypersensitivity responses were elicited in patients with cryptogenic fibrosing alveolitis (CFA) (twenty-eight), asbestosis (eight), mesothelioma (eight) and a ‘control’ group, having miscellaneous lung diseases not normally believed to be associated with T cell deficiency (twenty). Three antigens, Candida albicans, trichophyton and purified protein derivative (PPD) in a range of doses were used. There was no evidence of impaired cellular immunity in CFA or in mesothelioma, indeed there was a significantly increased frequency of reactions to PPD in both of these conditions (PP<0.01 respectively). There was, however, a trend of decreased responsiveness in the group with asbestosis. The dosage regimen used rarely gave completely negative results (only one of thirty-two completed tests), and may provide a basis for a simple and standard regimen for screening patients suspected of having defective T cell responses.
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