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. 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
blaTEM-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