EBJIS criteria | |
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I | Clinical: sinus tract (fistula) or purulence around prosthesis |
II | Cell count in joint aspiration: > 2000/μl leukocytes or > 70% polymorphonuclear granulocytes (PMN) |
III | Histology: inflammation in periprosthetic tissue (type 2 or 3 after Krenn Morawietz) |
IV | Microbial growth in synovial fluid or > = 2 tissue samples (in cases of high virulent microbes like Staphylococcus aureus one sample is considered sufficient) or sonication fluid ≥50 CFU/ml |
A PJI is diagnosed if at least one of the following criteria is fullfilled | |
Musculoskeletal Infection Society criteria | |
Definition of Periprosthetic Join Infection According to the International Consensus Group. This Is An Adaptation of the Musculoskeletal Infection Society Definition of PJI. | |
PJI Is Present When One of the Major Criteria Exists or Three Out of Five Minor Criteria Exist | |
Major Criteria | |
Two positive periprosthetic cultures with phenotypically identical organisms, OR | |
A sinus tract communicating with the joint, OR | |
Minor Criteria | |
1) Elevated serum C-reactive protein (CRP) AND erythrocyte sedimentation rate (ESR) | |
2) Elevated synovial fluid white blood cell (WBC) count OR ++change on leukocyte esterase test strip | |
3) Elevated synovial fluid polymorphonuclear neutrophil percentage (PMN%) | |
4) Positive histological analysis of periprosthetic tissue | |
5) A single positive culture |