. Author manuscript; available in PMC: 2013 Nov 1.

Published in final edited form as: J Shoulder Elbow Surg. 2012 Apr 18;21(11):1534–1541. doi: 10.1016/j.jse.2012.01.006

Table III.

Time trend in type of microbial infection

Time period	No. at risk	Organism	No.
1976-1990 (n = 4)	660 patients/764 shoulders	S aureus	2
		Clinically septic,^* no organism	1
		Necrosis, no organism	1
1991-2000 (n = 14)	650 patients/793 shoulders	S aureus	3
		Staphylococcus coagulase negative	3
		P acnes	1
		Serratia	1
		Clinically septic, no organism	6
2001-2008 (n = 14)	864 patients/1,031 shoulders	S aureus	5
		Staphylococcus coagulase negative	2
		Streptococcus	2
		P acnes	5

Defined as a diagnosis of periprosthetic infection made on clinical grounds, based on clinical signs/symptoms with or without pus or serosanguineous fluid or necrotic joint tissue but with sterile culture (no organism on gram stain or culture).