Rickettsial infection occurs in patients presenting with chronic fatigue syndrome (CFS), fibromyalgia, rheumatoid arthritis (RA), and/or neurological dysfunction, and can be successfully treated with tetracyclines, according to Dr Cecile Jadin, a general practitioner in Randburg, South Africa. She presented her findings at the 2nd Myalgic Encephalopathy/Chronic Fatigue Syndrome conference [Sydney, Australia; February 1999].