StacksVerified U.S. regulatory reference

21 CFR §866.5820

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
  1. (a)Identification. A systemic lupus erythematosus (SLE) immunological test system is a device that consists of the reagents used to measure by immunochemical techniques the autoimmune antibodies in serum and other body fluids that react with cellular nuclear double-stranded deoxyribonucleic acid (DNA) or other nuclear constituents that are specifically diagnostic of SLE. Measurement of nuclear double-stranded DNA antibodies aids in the diagnosis of SLE (a multisystem autoimmune disease in which tissues are attacked by the person's own antibodies).
  2. (b)Classification. Class II (performance standards).