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Eosinophilia in sick neonates
Antonia Manoura1, Eleftheria Hatzidaki, Eftihia Korakaki
1Department of Neonatology, University of Crete, Greece.
Haematologia
|September 24, 2002
Summary
Neonatal eosinophilia (elevated eosinophil count) is often linked to infection, particularly sepsis. While other factors may be involved, infection is the primary association, making eosinophil count a useful indicator in sick newborns.
Area of Science:
- Neonatal Medicine
- Immunology
- Pediatric Infectious Diseases
Background:
- Eosinophilia is frequently observed in newborns, but its underlying causes, mechanisms, and clinical importance remain unclear.
- Existing literature suggests associations between neonatal eosinophilia and various conditions, including drug reactions, infections, and specific treatments.
- The clinical significance of increased eosinophil counts in sick neonates requires further investigation.
Purpose of the Study:
- To investigate the potential links between diverse conditions, with a focus on infection, and neonatal eosinophilia.
- To determine if elevated eosinophil counts have clinical significance in managing critically ill neonates.
Main Methods:
- A case-control study comparing 56 neonates with eosinophilia (absolute eosinophil count > 700/mm3) to 55 matched control neonates.
- Data collected included gestational age, birth weight, hospitalization duration, and clinical factors such as blood transfusions, immunoglobulin treatment, antibiotic use, and infectious diseases.
Main Results:
- Significant differences between the eosinophilic and control groups were observed in blood transfusions, immunoglobulin treatment, specific antibiotic treatment, and the incidence of infectious diseases.
- Neonates with sepsis treated with antibiotics and immunoglobulins were more frequently transfused.
- The primary association identified was between eosinophilia and infection, with other observed associations being secondary.
Conclusions:
- Neonatal eosinophilia is strongly associated with infection, especially sepsis.
- An elevated absolute eosinophil count (> 700/mm3) serves as a reliable indicator for sepsis, with a relative risk of 1.58.
- While eosinophilia is a significant indicator, a normal eosinophil count does not rule out infection in sick neonates, necessitating strong consideration of infection in their evaluation.