A 35-year-old male presents with acute onset knee pain, swelling, and inability to bear weight. Examination reveals a hot, tense joint with restricted movement. Synovial fluid analysis shows WBC 85,000/μL with 92% neutrophils, glucose 18 mg/dL (serum 110 mg/dL), protein 6.2 g/dL, and positive Gram stain for cocci. Which of the following is NOT a typical feature of septic arthritis?