Document Detail

Allergy development and the intestinal microflora during the first year of life.
MedLine Citation:
PMID:  11590374     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The intestinal microflora is a likely source for the induction of immune deviation in infancy. OBJECTIVE: The purpose of this study was to prospectively relate the intestinal microflora to allergy development in 2 countries differing with respect to the prevalence of atopic diseases. METHODS: Newborn infants were followed prospectively through the first 2 years of life in Estonia (n = 24) and Sweden (n = 20). By that age, 9 Estonian and 9 Swedish infants had developed atopic dermatitis and/or positive skin prick test results. Stool samples were obtained at 5 to 6 days and at 1, 3, 6, and 12 months, and 13 groups of aerobic and anaerobic microorganisms were cultivated through use of standard methods. RESULTS: In comparison with healthy infants, babies who developed allergy were less often colonized with enterococci during the first month of life (72% vs 96%; P <.05) and with bifidobacteria during the first year of life (17% to 39% vs 42% to 69%; P <.05). Furthermore, allergic infants had higher counts of clostridia at 3 months (median value, 10.3 vs 7.2 log(10); P <.05). The prevalence of colonization with Staphylococcus aureus was also higher at 6 months (61% vs 23%; P <.05), whereas the counts of Bacteroides were lower at 12 months (9.9 vs 10.6 log(10); P <.05). CONCLUSION: Differences in the composition of the gut flora between infants who will and infants who will not develop allergy are demonstrable before the development of any clinical manifestations of atopy. Because the observations were made in 2 countries with different standards of living, we believe that our findings could indicate a role for the intestinal microflora in the development of and protection from allergy.
B Björkstén; E Sepp; K Julge; T Voor; M Mikelsaar
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of allergy and clinical immunology     Volume:  108     ISSN:  0091-6749     ISO Abbreviation:  J. Allergy Clin. Immunol.     Publication Date:  2001 Oct 
Date Detail:
Created Date:  2001-10-08     Completed Date:  2001-12-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  1275002     Medline TA:  J Allergy Clin Immunol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  516-20     Citation Subset:  AIM; IM    
Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden.
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MeSH Terms
Bacteroides / isolation & purification
Gram-Positive Bacteria / isolation & purification
Hypersensitivity / epidemiology,  etiology*,  microbiology
Hypersensitivity, Immediate / epidemiology
Infant, Newborn
Intestines / microbiology*
Prospective Studies

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