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Allergen-specific sensitization in asthma and allergic diseases in children: the study on farmers' and non-farmers' children.
Clin Exp Allergy. 2005 Feb; 35(2):160-6.CE

Abstract

BACKGROUND

Farmers' children are less frequently sensitized to common allergens than the non-farmers' children, but less is known about their sensitization to other allergens and its association with clinical diseases.

OBJECTIVE

To examine the association of farm environment with atopic sensitization, allergic diseases, expression of allergen-induced symptoms, and the importance of specific sensitization against 'common' (timothy, dog, cat, birch, Dermatophagoides pteronyssimus, mugwort) and 'other' (cockroach, horse, Lepidoglyphus destructor, cow) allergens for asthma and allergic diseases in children.

METHODS

A cross-sectional study including 344 farmers' and 366 non-farmers' children aged 6-13 years in eastern Finland, using a self-administered written questionnaire and skin prick tests against the above-mentioned allergens.

RESULTS

Farmers' children had less asthma and allergic diseases and were less often sensitized against common allergens than the non-farmers' children. However, little difference was observed in sensitization against the other allergens between the farmers' (17.2%) and non-farmers (14.5%) children [adjusted odds ratios (aOR) 1.11 (0.71-1.72)]. Being sensitized against only other allergens, without sensitization against common allergens, was unrelated to asthma or allergic diseases. Among the single allergens, sensitization against pets or pollen, or against horse or cow, had the strongest association with asthma, hayfever, and atopic eczema; no such association was seen in D. pteronyssimus, mugwort, cockroach, or L. destructor. Farmers' children had significantly less often symptoms of allergic rhinitis in contact with dog (aOR 0.32%, 95% confidence interval (CI) 0.15-0.67), cat (aOR 0.45, 0.22-0.88), or pollen (aOR 0.58%, 95% CI 0.37-0.90) than the non-farmers' children.

CONCLUSION

Farm environment reduces the occurrence of asthma, allergic diseases, and atopic sensitization in children, and also the occurrence of allergen-induced rhinitis. Remarkable differences were observed between single allergens in their association with allergic disease, stressing the importance of allergen selection when defining atopy in epidemiological studies.

Authors+Show Affiliations

The Department of Pediatrics, Kuopio University Hospital, Kuopio, Finland. Sami.Remes@ktl.fiNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15725186

Citation

Remes, S T., et al. "Allergen-specific Sensitization in Asthma and Allergic Diseases in Children: the Study On Farmers' and Non-farmers' Children." Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology, vol. 35, no. 2, 2005, pp. 160-6.
Remes ST, Koskela HO, Iivanainen K, et al. Allergen-specific sensitization in asthma and allergic diseases in children: the study on farmers' and non-farmers' children. Clin Exp Allergy. 2005;35(2):160-6.
Remes, S. T., Koskela, H. O., Iivanainen, K., & Pekkanen, J. (2005). Allergen-specific sensitization in asthma and allergic diseases in children: the study on farmers' and non-farmers' children. Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology, 35(2), 160-6.
Remes ST, et al. Allergen-specific Sensitization in Asthma and Allergic Diseases in Children: the Study On Farmers' and Non-farmers' Children. Clin Exp Allergy. 2005;35(2):160-6. PubMed PMID: 15725186.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Allergen-specific sensitization in asthma and allergic diseases in children: the study on farmers' and non-farmers' children. AU - Remes,S T, AU - Koskela,H O, AU - Iivanainen,K, AU - Pekkanen,J, PY - 2005/2/24/pubmed PY - 2005/6/21/medline PY - 2005/2/24/entrez SP - 160 EP - 6 JF - Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology JO - Clin Exp Allergy VL - 35 IS - 2 N2 - BACKGROUND: Farmers' children are less frequently sensitized to common allergens than the non-farmers' children, but less is known about their sensitization to other allergens and its association with clinical diseases. OBJECTIVE: To examine the association of farm environment with atopic sensitization, allergic diseases, expression of allergen-induced symptoms, and the importance of specific sensitization against 'common' (timothy, dog, cat, birch, Dermatophagoides pteronyssimus, mugwort) and 'other' (cockroach, horse, Lepidoglyphus destructor, cow) allergens for asthma and allergic diseases in children. METHODS: A cross-sectional study including 344 farmers' and 366 non-farmers' children aged 6-13 years in eastern Finland, using a self-administered written questionnaire and skin prick tests against the above-mentioned allergens. RESULTS: Farmers' children had less asthma and allergic diseases and were less often sensitized against common allergens than the non-farmers' children. However, little difference was observed in sensitization against the other allergens between the farmers' (17.2%) and non-farmers (14.5%) children [adjusted odds ratios (aOR) 1.11 (0.71-1.72)]. Being sensitized against only other allergens, without sensitization against common allergens, was unrelated to asthma or allergic diseases. Among the single allergens, sensitization against pets or pollen, or against horse or cow, had the strongest association with asthma, hayfever, and atopic eczema; no such association was seen in D. pteronyssimus, mugwort, cockroach, or L. destructor. Farmers' children had significantly less often symptoms of allergic rhinitis in contact with dog (aOR 0.32%, 95% confidence interval (CI) 0.15-0.67), cat (aOR 0.45, 0.22-0.88), or pollen (aOR 0.58%, 95% CI 0.37-0.90) than the non-farmers' children. CONCLUSION: Farm environment reduces the occurrence of asthma, allergic diseases, and atopic sensitization in children, and also the occurrence of allergen-induced rhinitis. Remarkable differences were observed between single allergens in their association with allergic disease, stressing the importance of allergen selection when defining atopy in epidemiological studies. SN - 0954-7894 UR - https://www.unboundmedicine.com/medline/citation/15725186/Allergen_specific_sensitization_in_asthma_and_allergic_diseases_in_children:_the_study_on_farmers'_and_non_farmers'_children_ L2 - https://doi.org/10.1111/j.1365-2222.2005.02172.x DB - PRIME DP - Unbound Medicine ER -