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High frequency of IgM antibodies to coxsackie B virus in sarcoidosis patients and patients with asbestos-related lesions.

By using radioimmunoassay (RIA) for detection of IgM antibodies to Coxsackie B viruses (CBV), the occurrence of these antibodies was investigated in patients with sarcoidosis and asbestos-related lesions. Sixty-one per cent of the patients with sarcoidosis, all patients with benign asbestos pleural effusion, and 67% of those with diffuse asbestos-related pleural thickening showed CBV-IgM. Patients with healed sarcoidosis or pleural plaques were all negative, and among the "healthy" controls seven per cent had CBV-IgM. Thus, there was a high frequency of CBV-IgM in patients with sarcoidosis and in those with asbestos-related diseases. Since the titres could be the effect of an unspecific polyclonal stimulation of the B cells, sera were tested for antibodies to rubella and cytomegalovirus, but without any remarkable results.