title: The predominant bacteria isolated from radicular cysts.
abstract: OBJECTIVE
  To detect predominant bacteria associated with radicular cysts and discuss in light of the literature.
  
  
  METHODS
  Clinical materials were obtained from 35 radicular cysts by aspiration. Cultures were made from clinical materials by modern laboratory techniques, they underwent microbiologic analysis.
  
  
  RESULTS
  The following are microorganisms isolated from cultures: Streptococcus milleri Group (SMG) (23.8%) [Streptococcus constellatus (19.1%) and Streptococcus anginosus (4.7%)], Streptococcus sanguis (14.3%), Streptococcus mitis (4.7%), Streptococcus cremoris (4.7%), Peptostreptococcus pevotii (4.7%), Prevotella buccae (4.7%), Prevotella intermedia (4.7%), Actinomyces meyeri (4.7%), Actinomyces viscosus (4.7%), Propionibacterium propionicum (4.7%), Bacteroides capillosus (4.7%), Staphylococcus hominis (4.7%), Rothia denticariosa (4.7%), Gemella haemolysans (4.7%), and Fusobacterium nucleatum (4.7%).
  
  
  CONCLUSIONS
  Results of this study demonstrated that radicular cysts show a great variety of anaerobic and facultative anaerobic bacterial flora. It was observed that all isolated microorganisms were the types commonly found in oral flora. Although no specific microorganism was found, Streptococcus spp. bacteria (47.5%) - especially SMG (23.8%) - were predominantly found in the microorganisms isolated. Furthermore, radicular cysts might be polymicrobial originated. Although radicular cyst is an inflammatory cyst, some radicular cyst fluids might be sterile.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Abant Izzet Baysal University, Bolu, Turkey. mtek@ibu.edu.tr.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Tek
authors.forename: Murat
authors.initials: M
authors.lastname: Metin
authors.forename: Ismail
authors.initials: I
authors.lastname: Sener
authors.forename: Cihan
authors.initials: C
authors.lastname: Bereket
authors.forename: Murat
authors.initials: M
authors.lastname: Tokac
authors.forename: Hakki O
authors.initials: HO
authors.lastname: Kazancioglu
authors.forename: Seref
authors.initials: S
authors.lastname: Ezirganli
mesh_terms: D000328:Adult; D001421:Bacteria, Anaerobic / Q000302:isolation & purification; D005260:Female; D006801:Humans; D008297:Male; D008336:Mandibular Diseases / Q000382:microbiology; D008439:Maxillary Diseases / Q000382:microbiology; D008828:Microbiological Techniques; D009061:Mouth Mucosa / Q000382:microbiology; D011842:Radicular Cyst / Q000382:microbiology*; D055815:Young Adult