What is Infectious Arthritis?
Infectious arthritis—often referred to as septic arthritis—is a painful and potentially serious infection in a joint. It occurs when bacteria, viruses, or fungi travel through the bloodstream from another part of the body, or enter the joint directly via an injury, wound, or surgical procedure.
Unlike chronic inflammatory arthritis that develops over months or years, septic arthritis typically strikes rapidly within hours or days. It is considered a medical emergency because untreated joint infections can quickly destroy cartilage and bone within the joint space.
Septic arthritis is a medical emergency. If you experience sudden, severe joint pain accompanied by fever and chills, seek immediate medical care.
Key Symptoms & Warning Signs
Infectious arthritis most frequently attacks weight-bearing joints such as the knees and hips, though it can affect wrists, ankles, and elbows:
Sudden Severe Pain
Intense, excruciating pain in a single joint that worsens significantly with minimal movement or weight-bearing.
Fever & Chills
Systemic signs of infection, including high fever, chills, and profound fatigue accompanying the joint inflammation.
Significant Swelling & Heat
Rapid accumulation of fluid inside the joint capsule, causing extreme tenderness, redness, and a hot sensation to the touch.
Diagnosis & Urgent Treatment
Rapid diagnosis is critical to preventing permanent joint destruction. Specialist management protocols include:
- Joint Aspiration (Arthrocentesis): Drawing fluid out of the infected joint using a sterile needle to analyze for white blood cells and identify the specific bacteria or pathogen responsible.
- Targeted Antimicrobial Therapy: Administering intravenous (IV) followed by oral antibiotics tailored specifically to destroy the identified infectious organism.
- Joint Drainage & Debridement: Removing infected fluid to relieve pressure, protect cartilage, and accelerate recovery.