Eosinophilia in Migrant Children: How Should We Proceed?

Area of Science:

• Pediatric Tropical Diseases
• Clinical Immunology
• Parasitology

Background:

• Eosinophilia presents a complex diagnostic challenge due to numerous potential causes.
• Intestinal parasites, particularly helminths, are significant concerns in pediatric populations from endemic regions.
• This study focuses on the diagnostic and management strategies for eosinophilia in a cohort of migrant children.

Purpose of the Study:

• To describe the diagnostic approach to eosinophilia in migrant children.
• To outline the clinical management of eosinophilia in this specific pediatric cohort.
• To identify the primary etiologies and risk factors associated with eosinophilia in migrant children.

Main Methods:

• A retrospective observational study was conducted from 2014 to 2018.
• Included children diagnosed with eosinophilia at a specialized pediatric tropical diseases center.
• A unified screening protocol involving direct microbiologic and serologic tests was applied to all patients.

Main Results:

• The study included 163 children, with helminths identified as the main etiology (56.4%) of eosinophilia.
• A significant proportion (40.5%) of patients had unexplained eosinophilia.
• Independent risk factors for unexplained etiology included younger age (≤2 years), absence of symptoms, and mild eosinophilia (<1000/µL).

Conclusions:

• Helminths are the predominant cause of eosinophilia in migrant children.
• A targeted diagnostic approach is essential to identify helminth infections.
• Prompt management, especially in older children with elevated eosinophil counts (>1000/µL), can lead to resolution.