Chlamydia infection may play role in type of arthritis - USATODAY.com

"Chlamydia infection may play a role in a type of arthritis called undifferentiated spondyloarthropathy (uSpA), a new study finds.

This form of arthritis is a type of spondyloarthritis (SpA), a group of diseases that share clinical features such as inflammatory back pain and inflammation at sites where tendons attach to bones. Other SpAs include ankylosing spondylitis, psoriatic arthritis, inflammatory bowel disease-related arthritis and reactive arthritis (ReA), according to background information in the release."