Table 2.

Organisms reported in dental procedure–associated lower extremity PJI and estimated sensitivity to amoxicillin (N = 45^a).

Common clinical group	Genus or Species	No.	Estimated % amoxicillin susceptibility for group [[12], [13], [14], [15], [16], [17], [18], [19], [20]]	% Total for group
Aerobic gram-positive organisms
Staphylococcus aureus	Staphylococcus aureus	5	0	11.4
Pyogenic streptococci	Group C Streptococcus	1	100	4.5
	Group G Streptococcus	1
Viridans group streptococci	S. salivarius	1	50	38.6
	S. anginosus group (S. intermedius)	1
	S. mitis group	2
	S. oralis	1
	S. gordonii	1
	S. mutans	1
	viridans group Streptococcus, NOS	10
Formally nutritionally variant streptococci	Granulicatella adiacens	2	50	4.5
Micrococcaceae	Rothia dentocariosa	1	60	11.4
	Rothia mucilaginosa	1
	Rothia aeria	1
	Rothia sp.	1
	Micrococcus sp.	1
Anaerobic gram-positive organisms
Peptostreptococcus spp.	Peptostreptococcus micros	1	95	18.1
	Peptostreptococcus (including former Peptococcus) spp.	4
Actinomyces spp.	Actinomyces israelii	1
	Actinomyces sp.	1
Coriobacteriaceae	Slackia exigua	1
Gram-negative organisms
Fastidious, anaerobic gram-negative	Haemophilus parainfluenzae	3	50	11.4
Enterobacteriaceae	Serratia marcescens	1	0
	Proteus mirabilis	1	0

N, total number of organisms; NOS, not otherwise specified; PJI, prosthetic joint infection.

^aForty-four organisms were reported from 44 PJI. One PJI had both Staphylococcus aureus and Proteus mirabilis. One PJI was reported as mixed gram-positive and gram-negative organisms and is excluded from Table 2.