Role of Oral and Intestinal Microbiota in Rheumatoid Arthritis (RA)

If you would like to participate in this study, we will first ask you several questions regarding the status of your arthritis, the medications you use or have used in the recent past, your social and dietary habits, and your medical and surgical history. If your answers tell us that you are the right patient for our study, we will go over a consent form which describes in more detail how we will study your intestinal and mouth bacteria, the immune cells in your blood and other genes, enzymes and proteins that tell us about your disease status. If you have Psoriatic Arthritis (PsA) or are healthy with no history of arthritis, and would like to participate in this study, your participation would involve only one or two visits, and no treatment. If you have Rheumatoid Arthritis (RA), your participation would involve six visits, and you would be randomly assigned to receive treatment with the antibiotic doxycycline, or the antibiotic vancomycin, or no antibiotic treatment.