| Associations between asthma and bronchial hyper-responsiveness with allergy and atopy phenotypes in urban black South African teenagers. | |
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MedLine Citation:
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PMID: 21920101 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Objectives. To determine asthma and allergy phenotypes in unselected urban black teenagers and to associate bronchial hyper-responsiveness (BHR) with asthma, other atopic diseases and allergen sensitisation. Methods. This was a cross-sectional study of 211 urban high-school black children of Xhosa ethnicity. Modified ISAAC questionnaires regarding asthma, eczema and rhinitis were administered. BHR was assessed by methacholine challenge using hand-held nebulisers. Skinprick tests (SPTs) were performed for 8 aeroallergens and 4 food allergens. Results. Asthma was reported in 9%, and 16 % demonstrated BHR. Rhinitis was reported in 48% and eczema in 19%. Asthma was strongly associated with BHR. Asthma was associated with eczema whereas BHR was associated with rhinitis. SPTs were positive in 34% of subjects, aeroallergens in 32%, and food allergens in 5%. The most common sensitivities were to house dust mites (HDM) and German cockroach. BHR was associated with sensitivity to any aeroallergen, cat, HDM, cockroach and bermuda grass. The number of positive SPTs was associated with asthma and BHR. With each level of SPT positivity, there was 40% increased prevalence of asthma and 70% increased prevalence of BHR. The rate of allergen sensitisation in subjects with BHR (72%) was much higher than those without BHR (28%); house dust mite sensitivity was 69% in subjects with BHR and 18% in those without. Conclusions. These are the highest rates of allergen sensitisation in subjects with BHR documented in an African setting and the widest difference in sensitisation rates between subjects with and without BHR. |
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Authors:
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M E Levin; R Muloiwa; C Motala |
Publication Detail:
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Type: Journal Article Date: 2011-06-27 |
Journal Detail:
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Title: South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde Volume: 101 ISSN: 0256-9574 ISO Abbreviation: S. Afr. Med. J. Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-09-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0404520 Medline TA: S Afr Med J Country: South Africa |
Other Details:
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Languages: eng Pagination: 472-6 Citation Subset: IM |
Affiliation:
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UCT. michael.levin@uct.ac.za. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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