C,
I had this blood test done and I tested positive on the DX test. My neuro used it as a rule in, along with clinical attacks and a spot on my spine MRI, I'm on a DMD. I was honestly shocked when it came back positive because I had felt crazy for so long.
Belle
My understanding is that this test is meant to replace the current Lumbar Puncture since it is less invasive with similar meaning for the results. Just like a LP test if positive along with clinical history, MRI, and the like you have MS. If negative you could still have MS.
Dennis