Reactive Arthritis Criteria (ACR)
Simplified criteria for diagnosing reactive arthritis (formerly Reiter's syndrome). Asymmetric oligoarthritis following infection.
Score interpretation
Score 0–2: Low likelihood
→ Consider septic arthritis, gout, or viral arthritis; synovial fluid if effusion present
Score 3–4: Possible reactive arthritis
→ Screen for causative organism (Chlamydia, Salmonella, Yersinia, Campylobacter); check HLA-B27; NSAIDs for symptom relief
Score ≥5: Probable reactive arthritis
→ Rheumatology referral; treat infection if confirmed; NSAIDs; consider sulfasalazine if persistent; eye review for uveitis
Interpretation bands for the Reactive Arthritis. Apply clinical judgement and local guidance.
References
- Braun J, et al. Classification criteria of reactive arthritis. Scand J Rheumatol. 2006.
Related
Curated clinical cross-links plus same-class fallbacks.
- Hydroxychloroquine · Aminoquinoline — Malaria Prophylaxis / SLE / Rheumatoid Arthritis
- Lissamine Green 1% Eye Drops · Vital Dye — Ocular Surface Staining (Dry Eye Diagnosis)
- Flucloxacillin (Burns — Wound Infection) · Antibiotic — Penicillinase-Resistant Penicillin
- Colistin (Polymyxin E — XDR Burns Infection) · Antibiotic — Polymyxin (Last-Resort)
- Deucravacitinib (TYK2 Inhibitor — Psoriatic Arthritis/Psoriasis) · Selective TYK2 Inhibitor (Allosteric — Regulatory Domain Binding)
- Cutaneous Lupus Erythematosus · BAD; EULAR
- Osteoporosis / Fragility Fracture · NOGG 2021; NICE NG147; NG224
- Arteritic AION (Giant Cell Arteritis) · RCOphth; BSR
- Osteoarthritis Hip / Knee Management · NICE NG226 (2022)
- Lupus Nephritis · EULAR/ERA-EDTA 2019; KDIGO 2024
- Rheumatoid Arthritis Management · NICE CG79 2018 / EULAR 2022
Decision support only — verify against a current formulary, NICE, or your local guideline before clinical use.