First ana 6 months ago 1:1280 fine speckeled 3 monts ago 1:320 fine speckled and last week 1:320 homogeneous all other autoimmune test negative ?

ANA: ANA is an antibody test used to help diagnose a variety of autoimmune diseases (body produces antibodies against its own tissues).It can be a difficult test to analyze on its own, particularly if tests for specific antibodies are negative; analysis would depend on reason for it to have been checked,other labs/studies etc.Positive ANA (lower than that, though) can even happen in absence of disease.