Third Component of Complement
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Quantitation of C3 is used to detect individuals with inborn deficiency of this factor or those with immunologic disease in whom complement is consumed at an increased rate. Increased levels are found in numerous inflammatory conditions as an acute phase reactant. Acquired deficiency is encountered in active lupus and glomerulonephritis. May be decreased in immune complex disease, serum sickness, chronic active hepatitis, inborn C3 deficiency and subacute bacterial endocarditis (SBE).
Adult: 83-240 mg/dl
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.