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Vol. 47. Issue 5.
Pages 417-424 (September - October 2019)
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Vol. 47. Issue 5.
Pages 417-424 (September - October 2019)
Original Article
DOI: 10.1016/j.aller.2019.02.001
Socio-environmental profile of child and adolescents sensitized by house dust mite in northeast of Brazil
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I.M.S. Araújoa, M.G.P. Benaa, P.O.L. de Britoa, J.L. do Carmo Limaa, M. da Silva Aguiara, L.G.L. Netob, S.G. Monteirob,c, P.V.S. Pereirad, A. Falcaib,
Corresponding author
angela.falcai@ceuma.br

Corresponding author.
a CEUMA University, Rua Josué Montello, n: 1, Renascença II, CEP: 65.075-120 São Luís, Maranhão, Brazil
b Laboratory of Environmental Microbiology, Master's Program in Environment, CEUMA University, Rua Josué Montello, n: 1, Renascença II, CEP: 65.075-120 São Luís, Maranhão, Brazil
c Federal University of Maranhão - UFMA, Department of Biology, Av dos Portugueses 1966, Bacanga, CEP: 65080-805 São Luís, Maranhão, Brazil
d Laboratory of Immunophysiology, Federal University of Maranhão, Av dos Portugueses 1966, Bacanga, CEP: 65080-805 São Luís, Maranhão, Brazil
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Tables (4)
Table 1. Prevalence of HDM sensitization in children and adolescents.
Table 2. Sensitization to HDM and to allergens from other sources.
Table 3. Patients’ socio-environmental profile.
Table 4. Analyses of the regression binary logistics of variables.
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Abstract
Introduction

The association regarding the atopic sensitization to mite aeroallergens and the socio-environmental features is still inconsistent.

Objectives

We analyzed the role played by socioeconomic and environmental factors in the prevalence of sensitization to house dust mite (HDM) allergens, and associated with the risk of developing asthma symptoms.

Patients and methods

This is a case–control study conducted with 108 patients, aged 1–17. We inquired about family habits, socioeconomic and environmental features. We applied the International Study of Asthma and Allergies in Childhood questionnaire.

Results

We observed patients sensitized to all HDM tested, Derp (42%), Derf (37%) and Blot (33%). Middle family income (OR: 2.74; CI95%: 1.127–6.684), exposure to dog (OR: 3.758, CI95%: 1.127–6.684) and artificial climatization (OR: 4.319, CI95%: 1.398–13.348) were associated with sensitization to Derp. We also observed protective factors, such as sharing of dormitories, washing cycle for bedspreads and the presence of basic sanitation. An increased risk of sensitization to Derf was associated with Blot sensitization (OR: 3.172, CI95%: 1.083–9.292) and presence of mold on the walls (OR: 3.095, CI95%: 1.063–9.008). A protective factor was dormitory sharing. For sensitization to Blot, we observed an increase in the risk associated with Derp sensitization (OR: 3.462, CI95%: 1.191–10.061) and exposure to dog (OR: 3.255, CI95%: 0.987–10.736). In addition, sensitization to Blot increases the risk of developing asthma symptoms (OR: 2.732, CI95%: 0.981–7.606).

Conclusion

Our data show distinct sociodemographic and environmental relations that lead to HDM sensitization and increased probability of development of allergic diseases.

Keywords:
Asthma
Allergens
Blomia tropicalis
Environment
Allergy

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