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Table 3 The Concordance and Discordance in PJI Organism between Preoperative Aspiration and Intraoperative synovial fluid Culture

From: The concordance between preoperative aspiration and intraoperative synovial fluid culture results: intraoperative synovial fluid re-cultures are necessary whether the preoperative aspiration culture is positive or not

Pathogens Concordant rate, (n,%) Discordant rate (%) False negative rate of intraoperative synovial culture (n,%)
Culture-negative 37/46, 80.43% 19.57% 37/46, 80.43%
Staphylococcus spp. 74/90, 82.22% 17.78% 9/90, 10%
Enterococcus spp. 9/11, 81.82% 18.96% 1/11, 9.98%
Streptococcus spp. 4/12, 33.33% 66.67% 4/12, 33.33%
Gram-positive Bacilli 4/4 100% 0  
Gram-negative Bacteria 10/11, 81.81% 18.18% 1/11, 18.18%
Fungi 8/9, 88.88% 11.12% 1/9, 11.12%
Polymicrobial PJI 1/4, 25% 75% 0