In our study, 41 of 44 patients (93%) had CRP >20 mg/L with a median of 94 mg/L and 36 of 40 patients (90%) had ESR greater than 20 mm/h with median of 47 mm/h, which are similar to the results published by Pääkkönen M et al27 Regarding synovial fluid analysis, synovial leucocyte count greater than 50,000/mm3 with predominance of neutrophils (>75%) is suggestive of septic arthritis.1 This evidence concerns the gene CRP and bacterial arthritis.