Asthma exacerbations in a subtropical area and the role of respiratory viruses: a cross-sectional study

Research article -  Open Access - Open Peer Review
 
Lusmaia Damaceno Camargo CostaEmail authorPaulo Augusto Moreira CamargosPaul L. P. BrandFabíola Souza FiaccadoriMenira Borges de Lima Dias e SouzaDivina das Dôres de Paula CardosoItalo de Araújo CastroRuth Minamisava and Paulo Sérgio Sucasas da Costa

Abstract

Background

Multiple factors are involved in asthma exacerbations, including environmental exposure and viral infections. We aimed to assess the association between severe asthma exacerbations, acute respiratory viral infections and other potential risk factors.

Methods

Asthmatic children aged 4–14 years were enrolled for a period of 12 months and divided into two groups: those with exacerbated asthma (group 1) and non-exacerbated asthma (group 2). Clinical data were obtained and nasopharyngeal samples were collected through nasopharyngeal aspirate or swab and analysed via indirect fluorescent immunoassays to detect influenza A and B viruses, parainfluenza 1–3, adenovirus and respiratory syncytial virus. Rhinovirus was detected via molecular assays. Potential risk factors for asthma exacerbation were identified in univariate and multivariate analyses.

Results

In 153 children (group 1: 92; group 2: 61), median age 7 and 8 years, respectively, the rate of virus detection was 87.7%. There was no difference between groups regarding the frequency of virus detection (p = 0.68); however, group 1 showed a lower frequency (19.2%) of inhaled corticosteroid use (91.4%, p < 0.01) and evidence of inadequate disease control. In the multivariate analysis, the occurrence of three or more visits to the emergency room in the past 12 months (IRR = 1.40; p = 0.04) and nonadherence to inhaled corticosteroid (IRR = 4.87; p < 0.01) were the only factors associated with exacerbation.

Conclusion

Our results suggest an association between asthma exacerbations, poor disease control and nonadherence to asthma medication, suggesting that viruses may not be the only culprits for asthma exacerbations in this population.

Download PDF

 

(You must be logged in to add and reply comments)

Interasma on Twitter

Interasma Top story: Autism risk determined by health of mom's gut, research reveals https://t.co/nt9cDWUj7t, see more https://t.co/CpGiFuOOYd
1hreplyretweetfavorite
Interasma RT @ARIAGuideline: Electronic Clinical Decision Support System for AR management: The Allergy Diary Companion app for health care providers…
9hreplyretweetfavorite
Interasma RT @Aller_MD: Antibody Responses Against S. Aureus in Atopic Dermatitis. Might an altered immune response towards various S. aureus antigen…
9hreplyretweetfavorite
Interasma RT @Aller_MD: Olfactory receptors 'do more than smell'. Human olfactory receptors are everywhere in the body — not just in the nose — and m…
9hreplyretweetfavorite
Interasma RT @Aller_MD: The latest Allergists on Social Media! https://t.co/Q0v2skrerV Thanks to @ERSpublications @COPDdoc @EMJRespiratory #mhr #tb
9hreplyretweetfavorite

Editor: Juan C. Ivancevich, MD

Copyright © Interasma 2003-2017  •  Terms of Use  •  Privacy Policy  •  Contact Us  •  Sitemap

Powered by FREI SA

InterAsma