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Community-acquired pneumonia in infants: Not simply an acute event with complete recovery

Rotem Lapidot1, Jeffrey Vietri2, Melody Shaff3

  • 1Boston University Schools of Medicine and Public Health, Boston, MA, USA; Boston Medical Center, Boston, MA, USA.

Respiratory Medicine
|December 5, 2021
PubMed

Insights

Hospitalized community-acquired pneumonia (CAP) in infants increases the risk of chronic respiratory disorders. This risk is higher when CAP occurs closer to preschool age, suggesting persistent inflammation.

Area of Science:

  • Pediatric Respiratory Medicine
  • Epidemiology
  • Public Health

Background:

  • Infant pneumonia can have lasting effects on lung development.
  • Community-acquired pneumonia (CAP) is a common childhood illness with potential long-term respiratory consequences.

Purpose of the Study:

  • To investigate the impact of hospitalized community-acquired pneumonia (CAP) in infancy on subsequent respiratory health.
  • To determine if early-life CAP increases the risk of chronic respiratory disorders and recurrent pneumonia.

Main Methods:

  • Retrospective matched-cohort study using de-identified electronic health records (2009-2018).
  • Compared healthy infants hospitalized for CAP before age 2 with matched controls without pneumonia.
  • Assessed outcomes including chronic respiratory disorders, reactive airway disease, and subsequent CAP hospitalizations between ages 2-5 years.

Main Results:

  • Infant CAP patients (n=1,343) showed significantly higher rates of chronic respiratory disorders (11.6 vs. 4.9 per 100 patient-years; RR=2.4) and reactive airway disease (6.1 vs. 1.9; RR=3.2) compared to controls (n=6,715).
  • Subsequent CAP hospitalizations were also more frequent in the CAP group (1.0 vs. 0.2 per 100 patient-years; RR=6.3).
  • Outcomes were most pronounced in CAP patients whose initial hospitalization occurred in their second year of life.

Conclusions:

  • Infant CAP is associated with a substantially increased risk of chronic respiratory disorders and reactive airway disease.
  • The risk of these long-term respiratory issues is elevated when CAP occurs closer to preschool age.
  • Findings support the hypothesis that persistent inflammation post-pneumonia contributes to chronic respiratory sequelae.
Abstract

Keywords:
PneumoniaRespiratory tract diseasesinfant

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