title: Real-time quantitative polymerase chain reaction and culture analyses of Enterococcus faecalis in root canals.
abstract: Reports on the prevalence of Enterococcus faecalis in root canals vary considerably, potentially because of variations in clinical sampling and sample analysis methods. This study compared culture and real-time quantitative polymerase chain reaction (qPCR) to detect and quantify E. faecalis in the same root canal sample. Consecutive root canal samples obtained from primary infection (n = 40) and retreatment (n = 48) cases were divided into two equal aliquots that were independently analyzed using culture and qPCR by investigators blinded to the analysis results of the other sample. E. faecalis was detected in 10.2% and 79.5% of samples by culture and qPCR, respectively (p < 0.0001; McNemar's test). E. faecalis was detected in more retreatment than primary infection samples (89.6% versus 67.5%; p = 0.01, Fisher's exact test). qPCR reported a significantly higher prevalence of E. faecalis in endodontic samples than culture techniques.
authors.affiliation: Department of Cardiology, Restorative Sciences and Endodontics, University of Michigan Dental School, Ann Arbor, MI, USA.
authors.forename: Christine
authors.initials: C
authors.lastname: Sedgley
authors.forename: Aaron
authors.initials: A
authors.lastname: Nagel
authors.forename: Gunnar
authors.initials: G
authors.lastname: Dahlén
authors.forename: Claes
authors.initials: C
authors.lastname: Reit
authors.forename: Anders
authors.initials: A
authors.lastname: Molander
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015373:Bacterial Typing Techniques; D015169:Colony Count, Microbial; D004269:DNA, Bacterial / Q000032:analysis; D003786:Dental Pulp Cavity / Q000382:microbiology*; D013293:Enterococcus faecalis / Q000302:isolation & purification*; D006801:Humans; D008875:Middle Aged; D016133:Polymerase Chain Reaction / Q000379:methods
chemical_list: D004269:DNA, Bacterial