TABLE 3.
Microbiological findings in 39 orthopedic implant-associated infection cases according to type of diagnostic method
| Characteristic | Value |
||
|---|---|---|---|
| Intraoperative tissue culture | Conventional sonication fluid culture | Sonication fluid inoculated in blood culture bottles | |
| No. (%) of cases by no. of microorganisms detected | |||
| 1 | 18 (46) | 26 (67) | 31 (79) |
| ≥2 | 5 (13)a | 8 (21)b | 8 (21)b |
| 0 | 16 (41) | 5 (13) | 0 (0) |
| Total no. of microorganisms isolated | 30 | 45 | 50 |
| No. (%) of microorganisms with Gram-positive cocci | 16 (53) | 27 (60) | 30 (60) |
| Coagulase-negative staphylococci | 8 | 16 | 17 |
| S. aureus | 3 | 4 | 5 |
| Viridans group streptococci | 1 | 3 | 4 |
| Enterococcus spp. | 4 | 4 | 4 |
| No. (%) of microorganisms with Gram-negative bacilli | 10 (33) | 10 (22) | 12 (24) |
| E. coli | 2 | 2 | 2 |
| Enterobacter spp. | 2 | 2 | 3 |
| Klebsiella spp. | 1 | 1 | 2 |
| Proteus spp. | 4 | 4 | 4 |
| P. aeruginosa | 1 | 1 | 1 |
| No. (%) of microorganisms that were anaerobes | 2 (7) | 5 (11) | 5 (10) |
| P. acnes | 2 | 5 | 5 |
| No. (%) of other microorganisms | 2 (7) | 3 (7) | 3 (6) |
| Candida spp. | 1 | 1 | 1 |
| Corynebacterium spp. | 1 | 2 | 2 |
a
Klebsiella spp. and Proteus spp.; Enterococcus spp., Proteus spp., and Pseudomonas spp.; Staphylococcus epidermidis and Staphylococcus warneri; Corynebacterium spp., Enterococcus spp., and Proteus spp.; S. epidermidis and Staphylococcus simulans.
b
Klebsiella spp. and Proteus spp.; Enterococcus spp., Proteus spp., and Pseudomonas spp.; S. epidermidis and S. warneri; Corynebacterium spp., Enterococcus spp., and Proteus spp.; S. epidermidis and S. simulans; S. epidermidis and Streptococcus spp.; Corynebacterium spp., S. epidermidis, and Enterococcus spp.; S. epidermidis and P. acnes.