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Volume 149, Issue 7

Rapid identification of Gram-positive anaerobic coccal species originally classified in the genus by multiplex PCR assays using genus- and species-specific primers Free

Abstract

Here, a rapid and reliable two-step multiplex PCR assay for identifying 14 Gram-positive anaerobic cocci (GPAC) species originally classified in the genus (, , , , , , , , , , , , and ) is reported. Fourteen type strains representing 14 GPAC species were first identified to the genus level by multiplex PCR (multiplex PCR-G). Since three of these genera (, and ) contain only a single species, , and , respectively, these organisms were identified to the species level directly by using the multiplex PCR-G. Then six species of the genus (, , , , and ) were further identified to the species level using multiplex PCR assays (multiplex PCR-Ia and multiplex PCR-Ib). Similarly, five species of the genus (, , , and ) were identified to the species level using multiplex PCR-IIa and multiplex PCR-IIb. The established two-step multiplex PCR identification scheme was applied to the identification of 190 clinical isolates of GPAC species that had been identified previously to the species level by 16S rRNA sequencing and phenotypic tests. The identification obtained from multiplex PCR assays showed 100 % agreement with 16S rDNA sequencing identification, but only 65 % (123/190) agreement with the identification obtained by phenotypic tests. The multiplex PCR scheme established in this study is a simple, rapid and reliable method for the identification of GPAC species. It will permit a more accurate assessment of the role of various GPAC species in infection and of the degree of antimicrobial resistance in each of the group members.

  • Received:
  • Accepted:
  • Revised:
  • Published Online:
Keyword(s): GPAC, Gram-positive anaerobic cocci , multiplex PCR-G, genus-level multiplex PCR and multiplex PCR-I or PCR-II, species-level multiplex PCR
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2003-07-01
2024-04-23
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Rapid identification of Gram-positive anaerobic coccal species originally classified in the genus Peptostreptococcus by multiplex PCR assays using genus- and species-specific primers
Microbiology 149, 1719 (2003); https://doi.org/10.1099/mic.0.26227-0
/content/journal/micro/10.1099/mic.0.26227-0
/content/journal/micro/10.1099/mic.0.26227-0
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