title: Molecular characterization of the presence of Eubacterium spp and Streptococcus spp in endodontic infections.
abstract: Eubacterium spp. and Streptococcus spp. are virulent, commonly identified microorganisms in endodontic infections. The purpose of this study was to use molecular methods to identify these organisms in 22 infected root canals that include eight cases with preoperative clinical symptoms and five cases with a history of diabetes mellitus. The presence of Streptococcus spp. and Eubacterium spp. was examined using two sets of PCR primers specific with multiple species within the respective genera. Positive specimens had their PCR products sequenced and phylogenetically analyzed to identify the specific species. Sixteen specimens (73%) contained Eubacterium spp. and nine (41%) were positive for Streptococcus spp. Eubacterium infirmum was the most prevalent Eubacterium sp. This organism was significantly associated with a history of diabetes (OR = 9.6; P = 0.04). Streptococcus anginosus was the most common Streptococcus sp., but neither it nor any of the other streptococci were significantly associated with the clinical parameters evaluated.
authors.affiliation: Department of Endodontology, School of Dental Medicine, University of Connecticut Health Center, Farmington CT, USA. fouad@nso.uchc.edu
authors.forename: A F
authors.initials: AF
authors.lastname: Fouad
authors.forename: K-Y
authors.initials: KY
authors.lastname: Kum
authors.forename: M L
authors.initials: ML
authors.lastname: Clawson
authors.forename: J
authors.initials: J
authors.lastname: Barry
authors.forename: C
authors.initials: C
authors.lastname: Abenoja
authors.forename: Q
authors.initials: Q
authors.lastname: Zhu
authors.forename: M
authors.initials: M
authors.lastname: Caimano
authors.forename: J D
authors.initials: JD
authors.lastname: Radolf
mesh_terms: D015373:Bacterial Typing Techniques; D016009:Chi-Square Distribution; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D003790:Dental Pulp Necrosis / Q000382:microbiology*; D003920:Diabetes Mellitus / Q000382:microbiology; D005051:Eubacterium / Q000235:genetics* / Q000302:isolation & purification; D006801:Humans; D016017:Odds Ratio; D010485:Periapical Periodontitis / Q000382:microbiology*; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D013291:Streptococcus / Q000235:genetics* / Q000302:isolation & purification
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal