Table 1.

Adopted MSIS criteria according to Shohat et al.²².

	Threshold	Score
Major criteria
Two positive growth of the same organism (standard culture)		Yes = infection
Sinus tract with evidence of communication to the joint		Yes = infection
Minor criteria
Serum CrP	> 10 mg/l	2
Synovial WBC	> 3.000 cells/µl	3
Synovial PMN	> 70%	2
Single positive culture		2
Positive histology		3
Intraoperative purulence		3
		Sum > 5 = infection