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Noninvasive Sampling of Mucosal Lining Fluid for the Quantification of In Vivo Upper Airway Immune-mediator Levels
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Determinants of acute respiratory infections in Soweto--a population-based birth cohort

Ines A Kristensen1, Jørn Olsen

  • 1Skejby University Hospital/Viborg Hospital, Aarhus, Denmark. ines@dadlnet.dk

South African Medical Journal = Suid-Afrikaanse Tydskrif Vir Geneeskunde
|August 16, 2006
PubMed

Insights

Crowding and communal living increase the risk of acute respiratory infections (ARIs) in infants. Breastfeeding offers protection against severe ARIs, while factors like maternal education and passive smoking showed no significant association in this study.

Area of Science:

  • Pediatrics
  • Epidemiology
  • Public Health

Background:

  • Acute respiratory infections (ARIs) are a major cause of infant illness and mortality globally, particularly in developing regions.
  • Respiratory viruses, notably respiratory syncytial virus, are frequent pathogens.
  • Potential risk factors for ARIs include male gender, overcrowding, limited healthcare access, low maternal education, and passive smoking.

Purpose of the Study:

  • To investigate the incidence and determinants of ARIs in a South African infant cohort.
  • To analyze the impact of factors like birth weight, breastfeeding, gender, crowding, passive smoking, indoor pollution, and sanitation on ARI development.

Main Methods:

  • A fixed birth cohort of 571 infants was followed from birth to one year of age in an urban, low-income setting in Soweto.
  • Home visits were conducted to monitor for ARI symptoms.
  • Data on potential risk factors were collected and analyzed.

Main Results:

  • A total of 489 episodes of cough or combined cough and nasal discharge were recorded.
  • Multivariate analysis indicated that only the father's education level and household crowding were significant determinants of ARIs.
  • Breastfed infants showed a reduced incidence of severe ARIs.

Conclusions:

  • Findings support the role of crowding and communal living conditions as significant determinants of ARIs.
  • Breastfeeding appears to be protective against severe ARIs.
  • The lack of association with other known risk factors may be due to limited statistical power in this specific population.
Abstract

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