Table II.
Diagnostic criteria for periprosthetic joint infection and aseptic loosening (according to 2013 Infectious Disease Society of America). 21
| Periprosthetic joint infection (≥ 1 positive criteria) | Aseptic loosening |
|---|---|
| 1. Sinus tract that communicates with the prosthesis or the presence of purulence without another known aetiology surrounding the prosthesis. | Three positive criteria were all negative, and surgery confirmed the loosening of at least one prosthetic part. |
| 2. Acute inflammation as seen on histopathologic examination of periprosthetic tissue. | |
| 3. At least two cultures that yield the same organism. The growth of a virulent microorganism (e.g. Staphylococcus aureus) in a single specimen is also considered as indicative of a periprosthetic joint infection. |