CRP and bacterial arthritis: In the antibacterial treatment cases (14 cases of PJI and 5 cases of pyogenic arthritis), the preoperative median WBC counts and median CRP levels were 5,670/mm3 (range, 3,630–8,690/mm3) and 0.2 mg/dL (range, 0.0–2.6, reference value 0.3), respectively.