Ssa Antibody Levels

The antibodies can be detected years before symptoms of sle surface making them an effective diagnostic tool.

Ssa antibody levels.

Some people with autoimmune diseases may get a negative test result for ana but positive for other antibodies. The ssa antibody is usually found with the ssb antibody which means there is typically an anti ssb blood test ordered with the anti ssa test. Both anti ssa and anti ssa are usually absent in secondary sjögren s syndrome. Anti ro ssa antibodies are found in 40 90 of patients with systematic lupus erythematosus sle.

In the book the lupus book. Ss a ro antibodies occur in patients with several different connective tissue diseases including sjogren syndrome an autoimmune disease that involves primarily the salivary and lachrymal glands up to 90 of cases. When anti ssa levels are elevated in sle it is often in antinuclear antibody ana negative lupus. Lupus erythematosus le 40 60 of.

Sjögren s antibody ss b is present only if sjögren s antibody ss a is also detected. It is not a specific enough test to determine a definitive diagnosis in a majority of patients but it can be used with other tools and tests to determine if lupus is present. Ss a ro is an extractable nuclear antigen ena composed of protein antigens of 52 kd and 60 kd combined with cytoplasmic rna species. The ssa antibody can also show up in a blood test that is unrelated to sjögren s syndrome.

Sjogren s antibodies ss a ss b sjögren s antibodies ss b is detected in approximately 15 of patients with sjögren s syndrome. A positive ana test means that you have high levels of ana in your blood. Anti ssa levels may be elevated in the following conditions. The presence of both antibodies ss a and ss b strengthen the diagnosis of sjögren s syndrome and conveys prognostic information.