Chronic pulmonary complications of early influenza virus infection in children

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Using Bioluminescent Imaging to Investigate Synergism Between Streptococcus pneumoniae and Influenza A Virus in Infant Mice
10:47

Using Bioluminescent Imaging to Investigate Synergism Between Streptococcus pneumoniae and Influenza A Virus in Infant Mice

Published on: April 14, 2011

L R Laraya-Cuasay, A DeForest, D Huff

    The American Review of Respiratory Disease
    |October 1, 1977
    PubMed

    Insights

    Infant influenza virus infection can cause severe, long-term lung damage, including fibrosis and bronchiolitis. Infectious virus persisted for 8 weeks, highlighting the serious potential of pediatric respiratory infections.

    Area of Science:

    • Pediatric Pulmonology
    • Virology
    • Pathology

    Background:

    • Influenza virus infections are common in infants and young children.
    • The long-term pulmonary sequelae following infant influenza are not well understood.

    Observation:

    • Three male infants experienced chronic pulmonary issues after influenza virus infection.
    • Lung biopsies revealed interstitial fibrosis, bronchial/bronchiolar damage, and inflammation.
    • Infectious Influenza A/Hong Kong/68 (H3N2) virus was isolated 8 weeks post-infection, indicating prolonged viral persistence.

    Findings:

    • Radiographic abnormalities included peribronchial thickening, interstitial densities, bronchiectasis, and atelectasis.
    • Pulmonary function tests demonstrated obstructive and restrictive patterns.
    • Some improvement was noted with bronchodilation, but exercise exacerbated symptoms.

    Implications:

    • Influenza virus infection may have more severe consequences in infants than previously recognized.
    • This can contribute to the pathogenesis of unexplained interstitial pneumonitis, pulmonary fibrosis, and bronchiectasis.
    • Highlights the need for further research into long-term pediatric respiratory health post-infection.

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