CRP and bacterial arthritis: Postsurgical septic arthritis is defined based on the following features: i) clinical presentation of fever, local pain, edema, erythema or tenderness; ii) laboratory investigations showing leukocytosis with elevated erythrocyte sedimentation rate (ESR), and C-reactive protein (CRP); iii) synovial fluid examination showing a white blood cell (WBC) count > 2.5 × 104/μL or positive synovial fluid culture results [3].