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Septicemia in association with acute lymphoblastic leukemia
Insights
In children with acute lymphoblastic leukemia (ALL), low absolute granulocyte counts (AGC) predict bacterial septicemia, often caused by specific bacteria linked to symptoms like respiratory or abdominal distress. Treatment guidelines can be informed by AGC and clinical findings.
Area of Science:
- Pediatric Oncology
- Infectious Diseases
- Hematology
Background:
- Septicemia poses a significant risk to children with acute lymphoblastic leukemia (ALL).
- Understanding the specific pathogens and risk factors associated with septicemia in this vulnerable population is crucial for effective management.
Purpose of the Study:
- To investigate the characteristics of septicemia episodes in children with ALL.
- To identify correlations between absolute granulocyte count (AGC), causative pathogens, and clinical manifestations.
- To provide data-driven guidelines for treating febrile episodes in pediatric ALL patients.
Main Methods:
- Retrospective analysis of 50 consecutive septicemia episodes in 41 children with ALL.
- Correlation of septicemia occurrence with absolute granulocyte count (AGC).
- Identification of bacterial pathogens and association with clinical symptoms (respiratory, abdominal distress).
Main Results:
- 76% of septicemia episodes occurred with an AGC ≤ 200/mm3.
- Common pathogens included gram-negative enteric and gram-positive mucocutaneous bacteria.
- Specific bacteria were linked to distinct clinical presentations: Streptococcus pyogenes at ALL diagnosis, mixed isolates with abdominal distress, and Streptococcus pneumoniae/Hemophilus influenzae with respiratory illness.
- Excluding severely compromised patients, 94% of septicemia cases had an AGC < 200/mm3.
Conclusions:
- Absolute granulocyte count is a key indicator for septicemia risk in pediatric ALL.
- Specific bacterial profiles and clinical findings can guide empirical treatment strategies.
- The study provides a framework for managing febrile episodes in ALL patients based on AGC and clinical context.
Abstract:
Fifty consecutive episodes of septicemia were studied in 41 children who had acute lymphoblastic leukemia. Seventy-six percent of these episodes occurred when the absolute granulocyte count was 200/mm3 or less and were caused by gram-negative enteric and gram-positive mucocutaneous bacteria. In eight patients, Streptococcus pyogenes was isolated at the time when ALL was diagnosed. Multiple anaerobic and aerobic isolates from a single blood culture were associated with abdominal distress, whereas Streptococcus pneumoniae and Hemophilus influenzae septicemia occurred in associated with respiratory illnesses. When patients with severe compromise of anatomic barriers or respiratory disease were excluded, 94% of all patients with septicemia had an AGC of less than 200/mm3. The data provide guidelines for treatment for febrile patients with ALL based upon the AGC, the phase of the disease, and on the presence of associated respiratory or abdominal findings.