Increased toxoplasma antibodies in idiopathic inflammatory muscle disease

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Abstract
Antibodies to Toxoplasrna gondii were measured in sera from 69 patients with polymyositis, dermatomyositis, and myositis associated with other connective tissue diseases and compared to 69 age-, race-, and sex matched controls with unrelated diseases. Complement fixation toxoplasma antibodies were significantly more frequent in polymyositis and correlated with high IgM levels. Other distinguishing clinical or laboratory fea tures of these patients were not found. The high tox oplasma antibodies were not associated with generally hyperactive humoral immunity. The serologic data sug gested that inflammatory muscle disease was associated with recent active toxoplasma infection in certain patients. The pathogenetic role of the microorganism remains uncertain.

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