Reactive arthritis, formerly known as Reiter syndrome, is a rare autoimmune condition primarily affecting the joints, which develops in response to an infection in another part of the body. The immune system reacts to the infection’s causative agent, usually a bacteria, and due to structural similarities between the bacteria and the body’s tissues, the immune system mistakenly attacks the body’s tissues. #shorts Find our full video library only on Osmosis: http://osms.it/more. Join over 3 million current & future clinicians who learn by Osmosis, and over 130 universities around the world who partner with us to make medical and health education more engaging and efficient. We have unparalleled tools and materials to prepare you to succeed in school, on board exams, and as a future clinician. Sign up for a free trial at http://osms.it/more. If you're interested in exploring an institutional partnership, visit osmosis.org/educators to request a personalized demo. Follow us on social: Facebook: http://osms.it/facebook Twitter: http://osms.it/twitter Instagram for med: http://osms.it/instagram Instagram for nursing: https://osms.it/ignursing TikTok: https://osms.it/tiktok Linkedin: https://osms.it/linkedin Our Vision: Everyone who cares for someone will learn by Osmosis. Our Mission: To empower the world’s clinicians and caregivers with the best learning experience possible. Learn more here: http://osms.it/mission Medical disclaimer: Knowledge Diffusion Inc (DBA Osmosis) does not provide medical advice. Osmosis and the content available on Osmosis's properties (Osmosis.org, YouTube, and other channels) do not provide a diagnosis or other recommendation for treatment and are not a substitute for the professional judgment of a healthcare professional in diagnosis and treatment of any person or animal. The determination of the need for medical services and the type