Klebsiella are a gram-negative bacteria found in your large intestine and they are responsible for your Ankylosing Spondylitis.
See my blog post about Klebsiella here: What Causes Ankylosing Spondylitis?
Dr. Alan Ebringer, Professor of Immunology, King’s College, London discovered the Klebsiella link to AS. Read more on Dr. Ebringer on KickAS.org, which is a fantastic AS support community and should be one of your first stops as you get a handle on this disease.
Need some actual science to back this up?
Here are some links to Dr. Ebringer’s scientific papers on Klebsiella and ankylosing spondylitis.