Table 1.

Minor criteria for shoulder PJI (Garrigues et al. 2019 [16••])

Criteria	Weight
Unexpected wound drainage	4
Single positive tissue culture with a virulent organism	3
Single positive tissue culture with a low-virulent organism	1
Second positive tissue culture (identical low-virulence organism)	3
Humeral loosening	3
Positive frozen section (5 neutrophils in ≥ 5 high-power fields)	3
Positive pre-operative aspirate culture	3
Synovial neutrophil percentage > 80%	2
Synovial white blood cell count > 3000 cells/μL beyond 6 weeks from surgery	2
ESR > 30 mm/h	2
CRP > 10 mg/L	2
Elevated synovial alpha-defensin	2
Cloudy synovial fluid	2