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Any benefits of probiotics in allergic disorders?

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Development of the child's immune system tends to be directed toward a T-helper 2 (Th2) phenotype in infants. To prevent development of childhood allergic/atopic diseases, immature Th2-dominant neonatal responses must undergo environment-driven maturation via microbial contact in the early postnatal period. Lactic acid bacteria and bifidobacteria are found more commonly in the composition of the intestinal flora of nonallergic children. Epidemiological data also showed that atopic children have a different intestinal flora from healthy children. Probiotics are ingested live health-promoting microbes that can modify intestinal microbial populations in a way that benefits the host; and enhanced presence of probiotic bacteria in the intestinal microbiota is found to correlate with protection against atopy. There is insufficient but very promising evidence to recommend the addition of probiotics to foods for prevention and treatment of allergic diseases, especially atopic dermatitis. Clinical improvement especially in allergic rhinitis and IgE-sensitized (atopic) eczema has been reported too. Literature data for food allergy/hypersensitivity and asthma are not adequate for this guaranteed conclusion; however, clinical benefit of probiotic therapy depends on numerous factors, such as type of bacterium, dosing regimen, delivery method, and other underlying host factors, e.g., the age and diet of the host. The selection of the most beneficial probiotic strain, the dose, and the timing of supplementation still need to be determined. Accordingly, probiotics can not be recommended generally for primary prevention of atopic disease; and if probiotics are used in atopic infants/children for any reason, such as therapy or prevention, cautionary approach ought to be taken.
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Keywords: Allergic disease; allergic rhinitis; allergy; asthma; atopic dermatitis; atopic disease; atopy; food allergy; food hypersensitivity; probiotics

Document Type: Research Article

Affiliations: Division of Allergy/Immunology, Department of Pediatrics, Private SEMA Research and Training Hospital, Istanbul, Turkey. [email protected]

Publication date: 01 March 2010

More about this publication?
  • Allergy and Asthma Proceedings is a peer reviewed publication dedicated to distributing timely scientific research regarding advancements in the knowledge and practice of allergy, asthma and immunology. Its primary readership consists of allergists and pulmonologists.

    The goal of the Proceedings is to publish articles with a predominantly clinical focus which directly impact quality of care for patients with allergic disease and asthma.

    Featured topics include asthma, rhinitis, sinusitis, food allergies, allergic skin diseases, diagnostic techniques, allergens, and treatment modalities. Published material includes peer-reviewed original research, clinical trials and review articles.

    Articles marked "F" offer free full text for personal noncommercial use only.

    The journal is indexed in Thomson Reuters Web of Science and Science Citation Index Expanded, plus the National Library of Medicine's PubMed service.
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