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  • Title: Prevalence of Prevotella intermedia and Prevotella nigrescens in infected root canals from a Brazilian population.
    Author: Siqueira Júnior J, Rôças IN, Oliveira JC.
    Journal: Aust Endod J; 2000 Dec; 26(3):110-2. PubMed ID: 11359249.
    Abstract:
    The purpose of the present study was to evaluate the prevalence of Prevotella intermedia and Prevotella nigrescens in symptomatic and asymptomatic endodontic infections from a Brazilian population. DNA extracted from samples obtained from 28 cases of endodontic infection were examined by the 16S rDNA-directed Polymerase Chain Reaction (PCR) method. PCR detected P. intermedia in 7.1% of the cases (2 out of 28 teeth) and P. nigrescens in only one sample (3.6%). The low prevalence of P. intermedia and P. nigrescens as reported in the present study is probably justified for geographical reasons.
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