Table 2.

Definition of periprosthetic joint infection adapted from MSIS definition of PJI [69]

Major criteria*	Two positive periprosthetic cultures with phenotypically identical organisms
	A sinus tract communicating with the joint
Minor criteria*	Elevated serum C-reactive protein AND erythrocyte sedimentation rate
	Elevated synovial fluid white blood cell (WBC) count OR ++ change on leukocyte esterase test strip
	Elevated synovial fluid polymorphonuclear neutrophil percentage (PMN%)
	Positive histological analysis of periprosthetic tissue
	A single positive culture

*PJI is present when one of the major criteria exists or three out of five minor criteria exist