A study in the May issue of the journal Arthritis & Rheumatism states that (from ProHealth.com), "Joint fluid in 62% of patients with inflammatory arthritis of unknown cause tested positive for DNA of Chlamydia pneumoniae (typically starts as respiratory infection) and/or Chlamydia trachomatis (typically starts as genito-urinary infection)."

The researchers studied whether undifferentiated spondyloarthropathy (uSpA) may actually be reactive arthritis caused by chlamydia in some cases.

They conclude that, "Our results suggest that in many patients with uSpA, chlamydial infection, which is often occult, may be the cause."

To read the study abstract, click here.

A full write-up can be found by clicking here.

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