Objective: This study aimed to clinically compare patients with culture-negative (CN) adult knee septic arthritis and culture-positive (CP) adult knee septic arthritis patients.Materials and Methods: 51 patients who were operated on with the diagnosis of adult knee septic arthritis between June 2016 and May 2023 were retrospectively examined. While 23 patients with CN were called Group 1, 28 patients with CP were called Group 2. Age, gender, side, C-reactive protein (Crp) value at admission, culture results, hospital stay and follow-up periods were evaluated. In clinical evaluation, knee ROM (range of motion) and visual analog score (VAS) were evaluated.Results: Both groups had similar distributions in terms of age, gender, side and follow-up periods. Group 1's Crp level at admission and total hospital stay were lower than Group 2. (p=0.018/p=0.0001) ROM and VAS scores of both groups were similar. No patient developed deep infection.
Conclusion:In CN adult knee septic arthritis patients, the average Crp values at the time of admission are lower and the hospital stay is shorter. Clinically, they have similar results to CP patients in terms of ROM and VAS.