Final answer:
Reiter's disease, known as reactive arthritis, is characterized by a triad of arthritis, conjunctivitis, and urethritis. Other symptoms can accompany these principal signs.
Step-by-step explanation:
The triad of systemic signs that compose Reiter's disease, now more commonly referred to as reactive arthritis, includes:
- Arthritis- swelling and pain of the joints, often the knees, ankles, and feet.
- Conjunctivitis- inflammation of the lining of the eye, causing redness and irritation.
- Urethritis- inflammation of the urethra, which leads to pain during urination and an increased urge to urinate.
This condition can be precipitated by certain infections and is characterized by the classic symptom triad. However, additional symptoms may include skin rashes, lesions, and sores on the mucous membranes.