Rheumatoid Factor Screening - Rheumatoid Factor (RF) Test

The Rheumatoid Factor (RF) test using Latex Agglutination technique measures the presence and quantity of autoantibodies of the IgM type that target the Fc portion of Immunoglobulin G (IgG). Their presence is a serological indicator (though not specific) associated with many autoimmune diseases, most notably rheumatoid arthritis.