Document Detail


Quantitative real-time PCR assays to identify and quantify fecal Bifidobacterium species in infants receiving a prebiotic infant formula.
MedLine Citation:
PMID:  15870317     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A healthy intestinal microbiota is considered to be important for priming of the infants' mucosal and systemic immunity. Breast-fed infants typically have an intestinal microbiota dominated by different Bifidobacterium species. It has been described that allergic infants have different levels of specific Bifidobacterium species than healthy infants. For the accurate quantification of Bifidobacterium adolescentis, Bifidobacterium angulatum, Bifidobacterium bifidum, Bifidobacterium breve, Bifidobacterium catenulatum, Bifidobacterium dentium, Bifidobacterium infantis, and Bifidobacterium longum in fecal samples, duplex 5' nuclease assays were developed. The assays, targeting rRNA gene intergenic spacer regions, were validated and compared with conventional PCR and fluorescent in situ hybridization methods. The 5' nuclease assays were subsequently used to determine the relative amounts of different Bifidobacterium species in fecal samples from infants receiving a standard formula or a standard formula supplemented with galacto- and fructo-oligosaccharides (OSF). A breast-fed group was studied in parallel as a reference. The results showed a significant increase in the total amount of fecal bifidobacteria (54.8% +/- 9.8% to 73.4% +/- 4.0%) in infants receiving the prebiotic formula (OSF), with a diversity of Bifidobacterium species similar to breast-fed infants. The intestinal microbiota of infants who received a standard formula seems to resemble a more adult-like distribution of bifidobacteria and contains relatively more B. catenulatum and B. adolescentis (2.71% +/- 1.92% and 8.11% +/- 4.12%, respectively, versus 0.15% +/- 0.11% and 1.38% +/- 0.98% for the OSF group). In conclusion, the specific prebiotic infant formula used induces a fecal microbiota that closely resembles the microbiota of breast-fed infants also at the level of the different Bifidobacterium species.
Authors:
Monique Haarman; Jan Knol
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Publication Detail:
Type:  Clinical Trial; Journal Article; Multicenter Study; Randomized Controlled Trial    
Journal Detail:
Title:  Applied and environmental microbiology     Volume:  71     ISSN:  0099-2240     ISO Abbreviation:  Appl. Environ. Microbiol.     Publication Date:  2005 May 
Date Detail:
Created Date:  2005-05-04     Completed Date:  2005-06-15     Revised Date:  2013-06-09    
Medline Journal Info:
Nlm Unique ID:  7605801     Medline TA:  Appl Environ Microbiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2318-24     Citation Subset:  IM    
Affiliation:
Microbiology Section, Biomedical Research Department, Numico Research BV., P.O. Box 7005, 6700 CA Wageningen, The Netherlands.
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MeSH Terms
Descriptor/Qualifier:
Bifidobacterium / isolation & purification*
Colony Count, Microbial
Double-Blind Method
Feces / microbiology*
Humans
Infant
Infant Formula*
Infant, Newborn
Polymerase Chain Reaction / methods*
Species Specificity
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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