Table 1. Periprosthetic Joint Infection (PJI) Diagnostic Criteria.

Diagnostic Criteria	Berbari et al (1998) 4		Musculoskeletal Infection Society (MSIS) 5		Infectious Diseases Society of America (IDSA) 6		International Consensus on Periprosthetic Joint Infection (I ICM) 7
	Major criteria	Minor criteria	Major criteria	Minor criteria	Major criteria	Minor criteria	Major criteria	Minor criteria
Joint sinus tract	X		X		X		X
≥ 2 positive cultures from SF and/or PPT (identical MO)	X		X		X		X
Periprosthetic pus accumulation	X			X	X
Increased ESR and CRP in blood				X				X
Leukocytosis in SF				X				X
Neutrophilia in SF				X				X
Histology: PPT inflammation	X			X		X		X
Single positive culture (SF or PPT)				X		X		X

Abbreviations: CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; MO, microorganism; PPT, periprosthetic tissue; SF, synovial fluid.