This test is only performed if the antinuclear antibody (ANA) screen is positive. The ENA screen includes antibodies to RNP, Sm, SS-A, SS-B, Scl-70 and Jo-1. If the ENA screen is positive then individual specificities will be checked and subsequently confirmed by immunoblot assay.
Jo-1 antibodies are detected in patients with myositis, especially in combination with pulmonary fibrosis.
|Positive range||:||0-40 AU/mL|
RST (rust top)
5-10 mL (1 mL serum)