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      Identification and antimicrobial susceptibility of enterococci isolated from the root canal.

      Oral microbiology and immunology
      Ampicillin, therapeutic use, Ampicillin Resistance, Anti-Bacterial Agents, Calcium Hydroxide, Clindamycin, Dental Pulp Cavity, microbiology, Dental Pulp Diseases, drug therapy, Drug Resistance, Microbial, Enterococcus faecalis, classification, drug effects, Enterococcus faecium, Erythromycin, Gram-Positive Bacterial Infections, diagnosis, Humans, Metronidazole, Penicillin G, Penicillin Resistance, Penicillins, Root Canal Filling Materials, Tetracycline, Tetracycline Resistance, Treatment Failure, Vancomycin

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          Abstract

          Enterococci are occurring in opportunistic infections involving the oral cavity. This study has identified enterococcal species in 29 endodontic infections undergoing treatment with Ca (OH)2 dressings. The in vitro antimicrobial susceptibility of 29 isolated enterococcal strains was determined. Enterococcus faecalis was speciated for 26 isolates and Enterococcus faecium for three isolates. In vitro antimicrobial susceptibility testing revealed enterococcal isolates resistant to benzylpenicillin, ampicillin, clindamycin, metronidazole and tetracycline but sensitive to erythromycin and vancomycin. Due to low sensitivity to antimicrobial agents, enterococci may be selected in root canals undergoing standard endodontic treatment and significantly contribute to endodontic treatment failures.

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