Objective:

To examine the long-term impact of early-life infection burden on later risks of moderate to severe infections and systemic antibiotic use in childhood.

Approach:

• Study Design: The study tracked 614 children from birth to age 10 or 13 years, utilizing diary-recorded data of common infections and national health records for follow-up.
• Data Collection: Parents documented daily episodes of infections from birth to age three, including colds, otitis media, tonsillitis, pneumonia, gastroenteritis, and fever.
• Outcome Assessment: Outcomes were assessed using adjusted incidence rate ratios (AIRRs) derived from quasi-Poisson regression models, accounting for potential confounders.

Key Findings:

• Children with a high burden of early-life infections (≥16 episodes) had a significantly increased risk of later moderate to severe infections (AIRR, 2.39; 95% CI, 1.52–3.89).
• Increased systemic antibiotic use was observed in children with a high burden of infections (AIRR, 1.34; 95% CI, 1.07–1.68).
• Each additional infection episode increased the risk of later infections (AIRR, 1.05; 95% CI, 1.02–1.08) and antibiotic treatments (AIRR, 1.02; 95% CI, 1.01–1.04).
• Respiratory infections were the most frequent early-life infections, with pneumonia comprising 77.6% of moderate to severe infections after age three.
• Early rhinovirus and enterovirus episodes were associated with increased later pneumonia risk (AIRR, 1.70 and 1.89, respectively).

Interpretation:

Limitations:

• The study may be limited by reliance on parental reporting for infection episodes.
• Potential confounding factors may not have been fully accounted for.

Conclusion:

Sources:

• JAMA Network Open