Infections in children with acute leukemia

Area of Science:

• Pediatric Oncology
• Infectious Diseases
• Hematology

Background:

• Childhood acute lymphoblastic leukemia (ALL) survival has improved, but infections remain a significant cause of mortality.
• Understanding the spectrum of infections in fatal ALL cases is crucial for developing targeted interventions.

Purpose of the Study:

• To analyze and compare the patterns of infections in children with fatal ALL during two distinct decades (1959-1960 and 1969-1970).
• To identify the primary causative organisms of death and evaluate the origin of fever at initial presentation.

Main Methods:

• Retrospective analysis of infection data from children with ALL who died in 1959-1960 (n=20) and 1969-1970 (n=59).
• Review of terminal illness and initial presentation infections, including microbiological data and pulmonary aspirates.

Main Results:

• The pattern of terminal infections in ALL patients did not significantly change between the two decades, with E. coli, Pseudomonas, Staphylococcus, and Candida being principal pathogens.
• In 1969-1970, only 8% of diffuse interstitial pneumonias were caused by Pneumocystis carinii, suggesting a viral etiology for most cases.
• Twenty percent of febrile ALL patients at initial presentation had proven infections, indicating non-infectious causes for fever in the majority.

Conclusions:

• Despite advances in antimicrobial therapy, the spectrum of life-threatening infections in childhood ALL remained largely unchanged over a decade.
• Non-infectious fever was common at initial presentation in children with ALL.
• Viral infections were suspected as the primary cause of diffuse interstitial pneumonia in this cohort.