Circulating immune complexes in subacute infective endocarditis and post-streptococcal glomerulonephritis.

Abstract
Two of 5 patients with subacute infective endocarditis and 2 patients with post-streptococcal glomerulonephritis had large amounts of soluble circulating immune complexes in their sera. The 3 others with endocarditis had less severe disease and minimal evidence of circulating immune complexes. Low serum complement was also found in 2 of the cases.