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Fatal influenza A virus infection in a child vaccinated against influenza

Peter Thomas1, Marion Riffelmann, Brunhilde Schweiger

  • 1Kinderklinik, Klinikum Krefeld, Robert-Koch-Institut, Germany.

The Pediatric Infectious Disease Journal
|March 5, 2003
PubMed

Insights

A vaccinated child died from influenza A virus pneumonia complicated by Staphylococcus aureus superinfection. This case highlights the potential for severe outcomes despite vaccination, emphasizing the need for vigilance against secondary bacterial infections.

Area of Science:

  • Pediatric Infectious Diseases
  • Virology
  • Bacteriology

Background:

  • Influenza A virus infections can cause severe pneumonia, particularly in children.
  • Vaccination is a primary preventive measure against influenza.
  • Bacterial superinfections can complicate viral respiratory illnesses, increasing morbidity and mortality.

Observation:

  • A 13-year-old vaccinated child experienced a fatal infection.
  • Influenza A virus RNA was detected in the lungs, bronchi, and myocardium via PCR.
  • A penicillin-sensitive Staphylococcus aureus strain was isolated from the child's bronchi.

Findings:

  • The case involved primary influenza A virus pneumonia.
  • A secondary bacterial infection with Staphylococcus aureus complicated the viral pneumonia.
  • The combined infection led to a fatal outcome despite the child's influenza vaccination status.

Implications:

  • This case underscores that even vaccinated individuals can experience severe or fatal influenza infections.
  • It highlights the critical risk of bacterial superinfections following viral pneumonia.
  • Clinicians should maintain a high index of suspicion for bacterial superinfections in severe respiratory illnesses, regardless of vaccination status.

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