TABLE 2.
Infecting microorganisms in prosthetic joint infections in hips and knees
| Microorganism | No. of organisms found in culturea (n = 39) |
No. of organisms determined by 16S rRNA sequencing (n = 33) | |
|---|---|---|---|
| Total | Subgroup | ||
| Polymicrobial | 11 | 5 | |
| Staphylococcus spp. | 14 | 16 | |
| S. aureus | 7 | ||
| S. epidermidis | 2 | ||
| S. lugdunensis | 3 | ||
| S. capitis | 1 | ||
| CoNS, others | 1 | ||
| Streptococcus spp. | 4 | 6 | |
| Hemolytic streptococcus group Cb | 2 | ||
| Hemolytic streptococcus group Gb | 2 | ||
| Enterococcus faecalis | 3 | 2 | |
| Escherichia coli | 2 | ||
| Pseudomonas aeruginosa | 1 | ||
| Salmonella serovar Dublin | 1 | 1 | |
| Propionibacterium spp. | 2 | 2 | |
| P. acnes | 2 | ||
| Finegoldia magna | 1 | 1 | |
a
Culturing showed positive results in 39 cases, and sequencing showed positive results in 33 cases. Due to the limited resolution in the 16S rRNA sequencing results, it was not possible to differentiate between species within the genera Staphylococcus, Streptococcus, and Propionibacterium.
b
The hemolytic streptococci all were identified in culture as Streptococcus dysgalactiae.