Chronic chlamydia psittacosis has been found in many types of autoimmune diseases. Psittaci was found in a significantly higher percent of patients with chronic polyarthritis and seronegative polyarthritis. The highest prevalence was found in double-negative RA and psoriatic arthritis patients. Investigation into infectious pathogens in autoimmune disease, including chlamydia psittacosis, may help discover root causes of a variety of chronic diseases.
“Chlamydophila psittaci subclinical infection in chronic polyarthritis”