. Author manuscript; available in PMC: 2012 Oct 1.

Published in final edited form as: J Endod. 2011 Oct;37(10):1337–1344. doi: 10.1016/j.joen.2011.06.028

Table 2.

Antibiotic resistance genes identified in specimens from primary and persistent cases.

Resistance Gene	Primary Infection		Persistent Infection		Overall Prevalence
	Preoperative N=30	Preobturation N=30	Preoperative N=15	Preobturation N=15	Preoperative N=45	Preobturation N=45
bla_TEM-1	13 (43%)	3 (10%)	2 (13%)	1 (7%)	15 (33%)	4 (9%)
cfxA	5 (17%)	0	0	0	5 (11%)	0
blaZ	0	0	1 (7%)	0	1 (2%)	0
tetM	5 (17%)	9 (30%)	3 (20%)	1 (7%)	8 (18%)	10 (22%)
tetW	6 (20%)	0	2 (13%)	1 (7%)	8 (18%)	1 (2%)
tetQ	3 (10%)	0	1 (7%)	0	4 (9%)	0