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  • Title: Comparative evaluation of automated ribotyping and RAPD-PCR for typing of Lactobacillus spp. occurring in dental caries.
    Author: Svec P, Kukletová M, Sedlácek I.
    Journal: Antonie Van Leeuwenhoek; 2010 Jun; 98(1):85-92. PubMed ID: 20361257.
    Abstract:
    A group of 67 Lactobacillus spp. strains containing Lactobacillus casei/paracasei, Lactobacillus fermentum, Lactobacillus gasseri, Lactobacillus plantarum, Lactobacillus rhamnosus and Lactobacillus salivarius species isolated from early childhood caries and identified to the species level in a previous study (Svec et al., Folia Microbiol 54:53-58, 2009) was characterized by automated ribotyping performed by the RiboPrinter microbial characterization system and by randomly amplified polymorphic DNA fingerprinting (RAPD-PCR) with M13 primer to evaluate these techniques for characterization of lactobacilli associated with dental caries. Ribotyping revealed 55 riboprints among the analysed group. The automatic identification process performed by the RiboPrinter system identified 18 strains to the species level, however cluster analysis divided obtained ribotype patterns into individual clusters mostly corresponding to the species assignment of particular strains. RAPD-PCR fingerprints revealed by the individual Lactobacillus spp. showed higher variability than the ribotype patterns and the fingerprint profiles generated by the analysed species were distributed among one to four clusters. In conclusion, ribotyping is shown to be more convenient for the identification purposes while RAPD-PCR fingerprinting results indicate this method is a better tool for typing of Lactobacillus spp. strains occurring in dental caries.
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