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RSV testing in bronchiolitis: which nasal sampling method is best?

P Macfarlane1, J Denham, J Assous

  • 1Department of Child Health, Rotherham General Hospital, UK. peter.macfarlane@rothgen.nhs.uk

Archives of Disease in Childhood
|May 24, 2005
PubMed
Summary
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Lower nasal swabs are less painful for infants with acute bronchiolitis but miss one-third of respiratory syncytial virus (RSV) cases. Nasopharyngeal aspirates are more accurate but cause more pain.

Area of Science:

  • Pediatrics
  • Infectious Diseases
  • Respiratory Medicine

Background:

  • Acute bronchiolitis is a common respiratory infection in infants.
  • Respiratory Syncytial Virus (RSV) is a primary cause of acute bronchiolitis.
  • Accurate and minimally invasive diagnostic methods are crucial for infant respiratory infections.

Purpose of the Study:

  • To compare the diagnostic accuracy and pain associated with lower nasal swabs versus nasopharyngeal aspirates for RSV detection in infants with acute bronchiolitis.
  • To evaluate the clinical utility of less invasive sampling methods.

Main Methods:

  • Infants hospitalized with acute bronchiolitis were enrolled.
  • Samples were collected using both lower nasal swabs and nasopharyngeal aspirates.

Related Experiment Videos

  • RSV detection was performed using immunofluorescence assays.
  • Pain scores were assessed post-procedure.

    • Main Results:

    • Lower nasal swabs were significantly less painful than nasopharyngeal aspirates.
    • However, lower nasal swabs yielded false-negative results in approximately one-third of RSV-positive cases.
    • Nasopharyngeal aspirates demonstrated higher sensitivity for RSV detection.

    Conclusions:

    • While less painful, lower nasal swabs have limitations in accurately diagnosing RSV in infants with acute bronchiolitis.
    • Nasopharyngeal aspirates remain a more reliable method for RSV detection despite causing more pain.
    • Clinical decisions should consider the trade-off between pain and diagnostic accuracy.