Rheumatoid Factor

Rheumatoid Factors are the best-known diagnostic markers for rheumatoid arthritis (RA), and presence of rheumatoid factors is an integral part of the current ACR criteria for classification of RA. Rheumatoid factors are a subcategory of immunoglobulins that specifically bind to the Fc regions of IgG. Elevated concentrations of rheumatoid factors are often correlated with a more severe course of the disease. IgM RF may precede the onset of RA by several years. In established RA, high titer serum IgM RF indicate poor prognosis. The presence of either IgG or IgA RF in patients with long-standing RA may be a prognostic indicator of systemic manifestations. For more extensive serological diagnosis, monitoring of treatment, and early diagnosis of rheumatoid arthritis, we recommend our Anti-MCV ELISA or – especially for point-of-care diagnosis – the rheumachec® rapid test.

Rheumatoid Factor IgA

Rheumatoid Factor IgA is an ELISA test for the quantitative determination of IgA rheumatoid factors (RF) in human serum or plasma.

Specifications

Product Number ORG 522A
Tests12 x 8 tests
CalibrationWHO 64/2
Calculationquantitative
Range0 - 500 U/ml
Cut-off 20 U/ml
Coating Fc fragments of IgG (human)
Alegria

ORG 222A   ORG 222G   ORG 222M   ORG 222S  

Documentation

Instruction for Use
Safety Data Sheet

Rheumatoid Factor IgG

Rheumatoid Factor IgG is an ELISA test for the quantitative determination of IgG rheumatoid factors (RF) in human serum or plasma.

Specifications

Product Number ORG 522G
Tests12 x 8 tests
CalibrationWHO 64/2
Calculationquantitative
Range0 - 500 U/ml
Cut-off20 U/ml
Coating Fc fragments of IgG (human)
Alegria

ORG 222A   ORG 222G   ORG 222M   ORG 222S  

Documentation

Instruction for Use
Safety Data Sheet

Rheumatoid Factor IgM

Rheumatoid Factor IgM is an ELISA test for the quantitative determination of IgM rheumatoid factors (RF) in human serum or plasma.

Specifications

Product Number ORG 522M
Tests12 x 8 tests
CalibrationWHO 64/2
Calculationquantitative
Range0 - 500 IU/ml
Cut-off20 IU/ml
Coating Fc fragments of IgG (human)
Alegria

ORG 222A   ORG 222G   ORG 222M   ORG 222S  

Documentation

Instruction for Use
Safety Data Sheet

Rheumatoid Factor Screen

Rheumatoid Factor Screen is an ELISA-based, automated, in-vitro test system for the quantitative determination of IgM, IgG, and IgA rheumatoid factors (RF) in human serum or plasma.

Specifications

Product Number ORG 522S
Tests12 x 8 tests
CalibrationWHO 64/2
Calculationquantitative
Range0 - 500 U/ml
Cut-off25 U/ml
Coating Fc fragments of IgG (human)
Alegria

ORG 222A   ORG 222G   ORG 222M   ORG 222S  

Documentation

Instruction for Use
Safety Data Sheet