Septic Arthritis

Definition

Single swollen and painful joint, with severe restriction in range of motion.

Diagnosis

Synovial fluid is essential to diagnosis.

It is typically purulent with leukocyte counts ranging 50-150,000 cells/mm3.

Gram stains have a poor sensitivity of 30-50%

Common Pathogens

Select All That Apply

Sexually active individuals. Tends to present with fever, chills, skin lesions, polyarthralgias and tenosynovitis and more likely to have oligoarthritis.

  • Evidence of MRSA infection elsewhere

  • Nasal colonization with MRSA

  • Injection drug use