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[Pneumonia due to Legionella pneumophila in an immunocompromised child]
K van Dijk1, S Kamphuis, S P M Geelen
1Afd. Algemene Pediatrie en Infectieziekten, Universitair Medisch Centrum, Wilhelmina Kinderziekenhuis, Postbus 85.090, 3508 GA Utrecht.
Insights
Legionella pneumophila pneumonia is rare in children but can occur in immunocompromised youth. Early diagnosis and appropriate antibiotics like erythromycin and rifampicin are crucial for recovery.
Area of Science:
- Pediatric Infectious Diseases
- Immunology
- Microbiology
Background:
- Pneumonia is a common childhood illness, but Legionella pneumophila is an uncommon cause, particularly in immunocompromised children.
- This case highlights the diagnostic challenges and treatment of Legionella pneumophila pneumonia in a pediatric patient with combined immunodeficiency.
Observation:
- A young boy with fever, cough, and malaise initially diagnosed with tonsillitis and pneumonia showed worsening symptoms despite standard antibiotic treatment.
- Immunologic investigations revealed a significant cellular and humoral immune disorder.
- Broncho-alveolar lavage identified Legionella pneumophila as the causative agent.
Findings:
- The patient's condition improved significantly after switching to erythromycin and rifampicin, indicating effective treatment against Legionella pneumophila.
- This case underscores the importance of considering Legionella pneumophila in the differential diagnosis of severe pneumonia in immunocompromised children.
Implications:
- Pediatricians and infectious disease specialists should consider Legionella pneumophila in immunocompromised children presenting with severe pneumonia, even if symptoms are atypical.
- Prompt and accurate diagnosis through microbiological investigation is vital for effective treatment and improved patient outcomes.
- Further research into Legionella pneumophila infections in pediatric populations, especially those with underlying immune deficiencies, is warranted.
Abstract:
A one-year-and-seven-months-old boy was hospitalised because of fever, cough and general malaise. A diagnosed tonsillitis and pneumonia were treated with intravenous antibiotics. His clinical condition worsened despite antibiotic therapy. After immunologic investigations revealed both a cellular and a humoral immune disorder, a broncho-alveolar lavage was performed. The culture revealed Legionella pneumophila. Antibiotic treatment was then changed to erythromycin in combination with rifampicin, with a good response. Although rarely described in childhood, one should consider L. pneumophila as a possible pathogen in immunocompromised children presenting with pneumonia.