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  • Title: Multiplex polymerase chain reaction detection of black-pigmented bacteria in infections of endodontic origin.
    Author: Seol JH, Cho BH, Chung CP, Bae KS.
    Journal: J Endod; 2006 Feb; 32(2):110-4. PubMed ID: 16427456.
    Abstract:
    The purpose of this study was to detect the presence of Porphyromonas endodontalis, P. gingivalis, Prevotella intermedia, P. nigrescens, and P. tannerae from clinical samples using multiplex polymerase chain reactions (PCR). Two different multiplex PCR protocols were used (one for the two Porphyromonas species and the other for the three Prevotella species), each one using a primer pair specific for each target species. The results were compared to those of the conventional culture procedures. Microbial samples were taken aseptically from 40 infected root canals and abscesses from patients. Samples were cultured in an anaerobic condition for conventional identification using a Rapid ID 32 A kit. Multiplex PCR was processed using the DNA extracted from each sample. At least one of the five species of black-pigmented bacteria (BPB) were detected in 65% (26 of 40) of the samples using multiplex PCR, and in 15% (6 of 40) using the conventional culture procedures. Multiplex PCR was more rapid, sensitive, specific, and effective in detecting BPB than the conventional culture procedures.
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