Unsurprisingly, therefore, IgM and, occasionally, low titer IgG autoantibodies, for example rheumatoid factors (RFs), antibodies to single-stranded (ss)DNA and antinuclear antibodies, are detected ...

One cannot be said to have lupus if the antibodies are abnormal but the person is well. The new criteria require that the test for antinuclear antibody (ANA) must be positive, at least once, but not ...