Storage Instruction:Store the kit at 4°C. Description:
The presence of IgM Rheumatoid Factor (RF) in the serum is the sole serological indicator included in the ACR list of criteria for the diagnosis of RA. RFs are a subset of antiglobulins directed against the Fc region of IgG. The here presented test systems for the determination of rheumatoid factors use only human Fcfragments as coated antigen. The Rheumatoid Factor Screen assay is designed to simultaneously screen for IgG/IgM/IgA rheumatoid factors. Further differentiation and typing should be carried out by using the individual test kits for the detection of IgG, IgM and IgA autoantibodies.