Tested negative for ankylosing spondylitis by PCR blood test. Apparently PCR is the most sensitive test. Does this mean I definitely don't have as?

No blood test for AS. If you are referring to the hla-b27, this is not a diagnostic test. You can still have as but it is less likely. This is a conversation for your doctor, however.

Related Questions

I'm confused-wouldn't negative PCR blood test for ankylosing spondylitis rule it out? Is this not the test for it?

No. Ankylosing spondylitis is diagnosed on history, physical exam and imaging. All the tests, famously the hla-b27, are ancillary and merely help confirm or rule things out in questionable cases. Read more...

Can you have ankylosing spondylitis with a negative antibody blood test?

Yes. The common arthritis labs are usually negative in ankylosing sponcylitis. Read more...
Not usually. There are always false negatives and positives. There are other tests to help confirm the diagnosis . A good rheumatologist will be able to help. Read more...
Yes. While most people with spondylitis carry the genetic marker called hla b-27, it is not present in 10-20% of spondylitis patients. In that situation, the diagnosis is made by finding typical x-ray, ct or MRI changes in the sacro-iliac joints. Likewise, only 20% of people who carry the b-27 gene ever develop spondylitis or a related condition. Read more...

Positive blood test for ankylosing spondylitis. 2 cases of iritis in 4 mos. No other symptoms like joint pain. Aside from iritis, will I get joint pain?

See below. It sounds like you are positive for hla-b27antigen. There is a good chance that you have joint involvement one day. However; it may be in the form of a different seronegative spondyloarthropathy besides ankylosing spondylitis. I would recommend that you consider seeing rheumatologist for an evaluation but also to be considered for therapy for your eyes since you have 2 attacks of iritis. Read more...