Cohort of Prosthetic Joint Infections

Large prospective cohort study in a French referral center for bone and joint infections.

Population

• all patients who consented to participate in the study with PJI treated with:
• debridement-synovectomy for acute infection
• with one-stage, two-stage exchange arthroplasty for chronic infection
• other procedures (complete removal of the prosthesis) and antibiotic therapy
• patients (non-operated or operated) receiving prolonged suppressive antibiotic therapy

Outcome:

• Follow-up at least 2 years
• Events monitored: reinfection including relapse and new infection, joint revision for mechanical failure, PJI related or non-related death Study duration: 10 years. Recruitment period: 4 years. Maximal duration of data collection: 6 years. Investigator center: monocenter study. Mean patient inclusion per year: 100 patients per year.

Inclusion criteria

• Patient aged over 18 years old with hip, knee and or shoulder joint prosthesis who consented to participate in the study with:
• According to musculoskeletal infection society definition: PJI is present when one of the major criteria exists or four out of six minor criteria.

Major Criteria:

• Two positive periprosthetic cultures with phenotypically identical organisms, OR
• A sinus tract communicating with the joint, OR

Minor Criteria:

• Elevated serum C-reactive protein (CRP) AND erythrocyte sedimentation rate (ESR)
• Elevated synovial fluid white blood cell (WBC)
• Elevated synovial fluid polymorphonuclear neutrophil percentage (PMN%)
• The presence of pus in the joint without known cause
• Positive histological analysis of periprosthetic tissue
• A single positive culture

Or a PJI which meets the following three criteria:

• Medical story suggesting prosthetic joint infection.
• The presence of pain either with or without swelling for more than 3 months unrelated to a mechanical cause.
• Germ identification in a single sample of fluid aspiration or tissue culture.

• Or microbial growth in prosthesis sonication fluid culture greater than 50CFU/ml.

Exclusion criteria

• Patient who does not meet eligibility criteria.
• Patient lawfully deprived of his liberty.
• Patient not insured under social security scheme.