Chronic Reactive Arthritis

Reactive arthritis, also referred to as postinfectious arthritic syndrome or historically as Reiter’s syndrome, represents a distinct entity within the seronegative spondyloarthropathies—a cluster of autoimmune disorders primarily affecting the joints and spine. This category also encompasses psoriatic arthritis, ankylosing spondylitis (AS), and the rare Whipple’s disease. The hallmark of reactive arthritis is the acute onset of inflammatory processes within peripheral joints, frequently accompanied by spinal involvement manifesting as back pain, morning stiffness, or restricted mobility. In medical literature, the condition is occasionally cited under its historical designations, such as Fiessinger-Leroy syndrome or Reiter’s triad, reflecting its association with preceding infections. While the precise etiopathology of reactive arthritis remains incompletely understood, prevailing hypotheses implicate prior infections of the urogenital tract (e.g., *Chlamydia trachomatis*), gastrointestinal tract (e.g., *Salmonella*, *Shigella*, *Yersinia*, *Campylobacter*), or respiratory system as triggering factors. An alternative theoretical framework emphasizes genetic susceptibility, particularly the presence of the HLA-B27 antigen, which substantially elevates the risk of developing autoimmune conditions. Epidemiological data indicate that individuals carrying this antigen exhibit up to a 50-fold increased likelihood of developing Reiter’s syndrome compared to non-carriers. Additional predisposing factors include male sex (with men affected approximately 15–20 times more frequently than women) and age, with peak incidence occurring between the ages of 20 and 40, although the disorder may emerge at any stage of life.

The clinical presentation of reactive arthritis encompasses a multifaceted array of symptoms that can be categorized based on their persistence and anatomical distribution. The **core symptomatic cluster**, universally present across all variants of the disease, consists of **widespread inflammatory processes affecting diverse bodily regions**: – **Articular involvement**: May manifest as **symmetrical monoarthritis** or **asymmetrical oligo/polyarthritis**, with a **predilection for distal extremities** (particularly the hands and feet). Accompanying features include **severe pain**, **soft-tissue swelling**, and **restricted joint mobility**. – **Enthesitis (inflammation of tendon insertions)**: Commonly affects the **Achilles tendon** and **elbow region**, resulting in **tenderness upon palpation** and **movement-related discomfort**. – **Spinal involvement**: Primarily localized to the **lumbosacral segment**, leading to **morning stiffness**, **radiating pain into the buttocks**, and **reduced spinal flexibility**. In individuals carrying the **HLA-B27 genetic marker**, **ocular inflammation** frequently develops, targeting the **conjunctiva**, **cornea**, or **iris**. Clinical indicators include **excessive lacrimation**, **hyperemia**, **photophobia**, and **periorbital edema**. Reactive arthritis may also trigger **urogenital inflammation**, presenting in women as **cervicitis or vaginitis** and in men as **orchitis, epididymitis, prostatitis, or seminal vesiculitis**. Characteristic symptoms encompass **dysuria** (painful urination), **pathological urethral discharge** (cloudy, yellow-white), and **urinary frequency**. Furthermore, the condition can induce **systemic manifestations**, such as **fever**, **malaise**, **abdominal pain**, or **diarrhea**, alongside **cardiac complications** (e.g., **myocarditis**) and **mucocutaneous alterations**. The latter may include **oral aphthous ulcers**, **keratoderma blennorrhagicum** (scaly lesions on the soles), and **nail dystrophy** (e.g., **brittleness, longitudinal ridging**).

The effective management of reactive arthritis fundamentally requires a substantial reduction in physical activity, particularly in joints affected by the inflammatory process. Rather than conventional movement-based exercises, a specialized rehabilitation program should be implemented, incorporating relaxation techniques alongside physiotherapeutic interventions designed to restore functional capacity. Pharmacological treatment remains an indispensable component, primarily utilizing non-steroidal anti-inflammatory drugs (NSAIDs) and glucocorticoids—administered both systemically and via intra-articular injections. In instances of active infection or severe infectious complications, targeted antibiotic therapy, tailored to the identified pathogen, may become necessary to ensure comprehensive disease control.