Abstract
Using DNA primers based on highly conserved regions of bacterial 16S ribosomal RNA genes, a technique was established for detection of Mobiluncus species by polymerase chain reaction (PCR) and hybridization analysis. Part of the 16S rRNA genes of Mobiluncus mulieris, Mobiluncus curtisii and uncharacterized Mobiluncus strains were analyzed by broad-range PCR amplification and direct DNA sequencing analysis. Sequence comparison of the partial 16S rRNA genes of Mobiluncus curtisii, Mobiluncus mulieris and atypical Mobiluncus strains studied indicated genus and species-specific motifs within the variable regions V3, V4 and V9 of 16S ribosomal DNAs. A Mobiluncus curtisii-specific primer, located within the variable region V3 of the 16S rRNA gene, was designed for Southern blot hybridization analysis of broad-range PCR products. Broad-range amplification combined with a M. curtisii-specific hybridization probe, Mob V3, distinguished between Mobiluncus curtisii, Mobiluncus mulieris, and atypical Mobiluncus strains.
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