CRP and bacterial arthritis: Delay in treatment of a septic joint, especially a larger joint such as the hip, can lead to rapid deterioration or necrosis of the articular surface.18,19 When septic arthritis of the hip is suspected, the modified Kocher criteria are typically used.20 This patient presented with three of five criteria based on his inability to bear weight on the affected side and elevated ESR and CRP (>40 mm/hr and >2 mg/dL, respectively), which translates to an 83% probability of septic arthritis of the hip according to Caird et al.