Bifidobacterium pseudocatenulatum

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• 作者：Claudia Gore ; Karen Munro ; Christophe Lay ; Rodrigo Bibiloni ; Julie Morris ; Ashley Woodcock ; Adnan Custovic ; Gerald W. Tannock
• 关键词：Eczema ; atopic dermatitis ; atopy ; allergy ; gastrointestinal ; microbiota ; microflora ; bifidobacteria ; fecal bacterial community
• 刊名：Journal of Allergy and Clinical Immunology
• 出版年：2008
• 出版时间：January 2008
• 年：2008
• 卷：121
• 期：1
• 页码：135-140
• 全文大小：436 K

文摘

Background

Exposure to specific bacterial bowel commensals may increase/reduce the risk of atopic diseases.

Objective

To compare fecal bacterial communities of young infants with/without eczema.

Methods

Nested case-control study. Infants age 3 to 6 months with eczema (cases, n = 37) and without (controls, n = 24) were matched for sex, age, feeding (breast/bottle/mixed/solids), ethnicity. Information was collected on maternal/infant antibiotic exposure, feeding, gastrointestinal symptoms, family history of allergy. Eczema severity scoring was used (Severity Scoring of Atopic Dermatitis index). Samples were taken for determination of allergen-specific serum IgE (cases) and urinary/fecal eosinophilic protein X. Gastrointestinal permeability was measured. The compositions of fecal bacterial communities were analyzed (culture-independent, nucleic acid–based analyses).

Results

There was no difference in overall profiles of fecal bacterial communities between cases and controls. Family history of allergy increased likelihood of bifidobacteria detection (history, 86 % ; no history, 56 % ; P = .047); breast-fed infants were more likely to harbor Bifidobacterium bifidum (odds ratio, 5.19; 95 % CI, 1.47-18.36; P = .01). Bifidobacterium pseudocatenulatum was detected more commonly in feces of non–breast-fed children (odds ratio, 5.6; 95 % CI, 1.3-24.3; P = .02) and children with eczema (eczema, 26 % ; no eczema, 4 % ; P = .04). There were no significant associations between clinical measurements and detection of B pseudocatenulatum.

Conclusion

Presence of B pseudocatenulatum in feces was associated with eczema and with exclusive formula-feeding; B bifidum was associated with breast-feeding.