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Pneumococcal meningitis in sickle cell disease in childhood
Insights
Children with sickle cell disease (homozygous hemoglobin S) are more prone to pneumococcal meningitis. However, they face similar risks and outcomes compared to children with hemoglobin A, despite increased susceptibility.
Area of Science:
- Pediatrics
- Hematology
- Infectious Diseases
Background:
- Pneumococcal meningitis is a serious infection, particularly in children.
- Sickle cell disease (homozygous hemoglobin S) is known to increase susceptibility to encapsulated bacteria like Streptococcus pneumoniae.
- Understanding the specific impact of homozygous hemoglobin S on pneumococcal meningitis outcomes is crucial for clinical management.
Purpose of the Study:
- To compare the clinical presentation, laboratory findings, and outcomes of pneumococcal meningitis in children with homozygous hemoglobin S versus those with hemoglobin A.
- To determine if homozygous hemoglobin S confers an increased risk of mortality or morbidity from pneumococcal meningitis.
Main Methods:
- Hemoglobin electrophoresis was performed on children diagnosed with pneumococcal meningitis.
- A cohort of 17 children with homozygous hemoglobin S was identified and compared to 19 age- and symptom-matched children with hemoglobin A.
- Clinical symptoms, laboratory data, hematocrit values, mortality, and morbidity (including sequelae) were analyzed.
Main Results:
- Children with homozygous hemoglobin S showed a higher susceptibility to pneumococcal meningitis (24% of the studied population).
- No significant differences were observed in symptoms or most laboratory data between the two groups, except for hematocrit values.
- Patients with fatal outcomes presented later than controls, irrespective of hemoglobin type.
- Mortality and morbidity rates were similar, with control patients experiencing a wider range of serious sequelae.
Conclusions:
- While children with homozygous hemoglobin S are significantly more susceptible to pneumococcal meningitis, they do not appear to be at an increased risk of adverse effects from the infection itself.
- Clinical management and outcomes for pneumococcal meningitis are comparable between children with homozygous hemoglobin S and those with hemoglobin A, despite the higher incidence in the former group.
Abstract:
In a population of children with pneumococcal meningitis, 71 had hemoglobin electrophoresis, and 17 of these were found to have homozygous hemoglobin S (24%). These 17 children were compared with 19 similarly infected children who had hemoglobin A and were matched for age and duration of symptoms before treatment. There was no difference in the symptoms or laboratory data, except for the hematocrit value, but patients with fatal disease came to the hospital later than control patients. The mortality and morbidity were similar even though control patients had a wider range of serious sequelae. Although patients with homozygous hemoglobin S were shown to be much more susceptible to pneumococcal meningitis, they were not at an increased risk from its effects.