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Open Access item Quantitative assessment of faecal bifidobacterial populations by real-time PCR using lanthanide probes

Authors:Gueimonde Fernández, Miguel
Debor, Linde
Tölkko, Sattu
Jokisalo, Erik
Salminen, Seppo
Keywords:Bifidobacterias, Microbiótica intestinal, PCR cuantitativa
Issue Date:2007
Publisher:Society for Applied Microbiology
Citation:Journal of Applied Microbiology 102(4): 1116-1122 (2007)
Abstract:Aim: To develop real-time quantitative PCR methods, based on the use of probes labelled with a stable fluorescent lanthanide chelate, for the quantification of different human faecal bifidobacterial populations. Methods and Results: The designed quantitative PCR assays were found to be specific for the corresponding Bifidobacterium species or groups (Bifidobacterium longum group, Bifidobacterium catenulatum group, Bifidobacterium adolescentis, Bifidobacterium breve, Bifidobacterium angulatum, Bifidobacterium bifidum and Bifidobacterium dentium). The detection limits of the methodologies used ranged between 2 · 105 and 9 · 103 cells g)1 of faeces. The applicability of the developed assays was tested by analysing 20 human faecal samples. Bif. longum group was found to be the qualitatively and quantitatively predominant bifidobacterial group. Conclusions: The real-time PCR procedures developed here are specific, accurate, rapid and easy methods for the quantification of Bifidobacterium groups or species in human faecal samples. Significance and Impact of the Study: The developed procedures will facilitate rapid and objective counting of large numbers of samples increasing our knowledge on the role of gut bifidobacterial microbiota in health and disease. This will contribute to the efficient use of intestinal bacterial assays in research, food and pharmaceutical development as well as in the assessment of dietary management of diseases.
E-ISSNmetadata.dc.identifier.doi = DOI:1365-2672
Appears in Collections:(IPLA) Artículos

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