Journal Article

Bottle Feeding and Exposure to <i>Toxocara</i> as Risk Factors for Wheezing Illness among Under-five Amazonian Children: A Population-based Cross-sectional Study

Marcelo Urbano Ferreira, Guita Rubinsky-Elefant, Teresa Gontijo de Castro, Érika Hellena Esther Hoffmann, Mônica da Silva-Nunes, Marly Augusto Cardoso and Pascoal Torres Muniz

in Journal of Tropical Pediatrics

Volume 53, issue 2, pages 119-124
Published in print April 2007 | ISSN: 0142-6338
Published online January 2007 | e-ISSN: 1465-3664 | DOI:
Bottle Feeding and Exposure to Toxocara as Risk Factors for Wheezing Illness among Under-five Amazonian Children: A Population-based Cross-sectional Study

Show Summary Details


We investigated the prevalence and risk factors for wheezing and asthma in young Amazonian children. A population-based cross-sectional survey of 606 children aged 6–59 months was performed in two small towns in Acre State, Northwestern Brazil. Information on outcome variables (recent wheezing and medical diagnosis of asthma) and demographic, socioeconomic, environmental, maternal and nutritional variables was obtained by interviewing children's mothers or guardians. Infections with intestinal parasites and antibodies to the zoonotic nematode Toxocara were diagnosed using standard laboratory techniques. Multiple unconditional logistic regression models were used to describe associations between independent variables and outcomes. The prevalence of recent wheezing (one or more reported episodes in the past 12 months) was 42.6%, but only 19.8% of wheezing children were also reported to have a medical diagnosis of asthma (prevalence, 8.5%); 21.5% of the children examined had antibodies to Toxocara. Increased risk of asthma was independently associated with early introduction of bottle feeding, defined as <4 months of exclusive breastfeeding [adjusted odds ratio (aOR) = 2.21, 95% confidence interval (95% CI), 1.07–4.59, P = 0.033], and seropositivity to Toxocara (aOR = 2.37, 95% CI 1.17–4.77, P = 0.016), suggesting two potential targets for public health interventions.

Keywords: asthma; wheezing; Toxocara; helminthes; breastfeeding; population-based studies; Amazonia

Journal Article.  2903 words. 

Subjects: Paediatrics

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.