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Long-term consequences of respiratory syncytial virus (RSV) bronchiolitis

L Bont1, W M Aalderen, J L Kimpen

  • 1Wilhelmina Children's Hospital, University Medical Centre, Utrecht, The Netherlands.

Paediatric Respiratory Reviews
|January 18, 2003
PubMed

Insights

Infants with respiratory syncytial virus (RSV) lower respiratory tract infection (LRTI) often develop recurrent childhood wheezing. The exact causes linking RSV LRTI to long-term airway issues remain unclear.

Area of Science:

  • Pediatrics
  • Immunology
  • Pulmonology

Background:

  • Respiratory syncytial virus (RSV) lower respiratory tract infection (LRTI) in infancy is linked to subsequent recurrent wheezing in childhood.
  • Airway hyper-responsiveness and abnormal lung function are common in affected children.
  • The long-term impact of infantile RSV LRTI on childhood airway morbidity is not fully understood.

Purpose of the Study:

  • To explore the mechanisms behind the association between RSV LRTI and persistent airway morbidity.
  • To investigate whether RSV LRTI causes long-term airway changes or if pre-existing conditions predispose infants to both RSV LRTI and wheezing.

Main Methods:

  • Review of follow-up studies on infants with RSV LRTI.
  • Analysis of associations between RSV LRTI, lung function, and recurrent wheezing.
  • Examination of potential roles for congenital factors versus acquired changes post-infection.

Main Results:

  • Approximately 50% of infants with RSV LRTI experience recurrent wheezing episodes.
  • Wheezing symptoms tend to decrease over time, with less association by school age.
  • Human studies do not strongly support a role for atopy in developing recurrent wheezing after RSV LRTI, unlike some animal models.

Conclusions:

  • The relationship between RSV LRTI and long-term airway issues requires further investigation into underlying mechanisms.
  • Both pre-existing airway abnormalities and post-RSV infection changes are potential contributors to persistent wheezing.
  • While animal models suggest a link to allergic sensitization, human data currently do not confirm this pathway for recurrent wheezing post-RSV LRTI.

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