Vitamin D Deficiency is Associated with Increased Use of Antimicrobials among Preschool Girls in Ethiopia

Area of Science:

• Pediatrics
• Infectious Diseases
• Nutritional Science

Background:

• Preschool children in Addis Ababa, Ethiopia, experience significant exposure to influenza viruses.
• Understanding factors contributing to the burden of respiratory infections, including nutrition and environmental conditions, is crucial.

Purpose of the Study:

• To investigate factors influencing influenza and other respiratory infections in preschool children.
• To assess the relationship between nutritional status (vitamins D, A, B12) and infection rates.
• To explore differences in infection burden and nutritional status between boys and girls.

Main Methods:

• A 12-month clinical follow-up of 95 preschool children (48 girls, 47 boys).
• Assessment of illness, immune responses to influenza and other respiratory pathogens (viruses, bacteria).
• Measurement of vitamin D (25-hydroxyvitamin D), vitamin A, and vitamin B12 levels.

Main Results:

• High prevalence of antibodies to respiratory pathogens at baseline and frequent infections during follow-up.
• Ninety percent of children had insufficient 25-hydroxyvitamin D levels.
• Treated girls showed significantly lower 25-hydroxyvitamin D levels compared to non-treated girls and treated boys; short treated girls had lower vitamin D.
• Preschool girls with low vitamin D were more vulnerable to pathogenic microbes than boys.

Conclusions:

• Low vitamin D status is prevalent in Ethiopian preschool children and linked to increased vulnerability to respiratory infections.
• Nutritional deficiencies, particularly vitamin D, may exacerbate the burden of infectious diseases in this population.
• Sex-specific differences in vitamin D levels and infection vulnerability were observed, highlighting the need for targeted interventions.