The Relationship between Bronchiolitis Severity and Vitamin D Status

Area of Science:

• Pediatrics
• Nutritional Immunology

Background:

• Acute bronchiolitis is a common viral respiratory infection in infants under two years old.
• While often mild, severe cases requiring intensive care occur.
• Vitamin D plays a role in immune regulation.

Purpose of the Study:

• To investigate the association between serum vitamin D levels and the clinical severity of acute bronchiolitis in infants.
• To determine if vitamin D deficiency or insufficiency correlates with severe disease outcomes.

Main Methods:

• Prospective enrollment of 182 infants diagnosed with acute bronchiolitis.
• Assessment of disease severity using the Modified Tal Scoring System.
• Evaluation of serum vitamin D levels in all participants.

Main Results:

• Nearly half (47.8%) of infants with bronchiolitis had vitamin D deficiency or insufficiency.
• Lower vitamin D levels were significantly associated with more severe bronchiolitis (p = 0.002).
• Infants requiring intensive care unit admission showed significantly higher rates of vitamin D deficiency/insufficiency (p < 0.001).

Conclusions:

• Vitamin D deficiency is strongly linked to severe bronchiolitis and the need for intensive care in infants.
• Assessing and supplementing vitamin D levels before bronchiolitis season may offer protective benefits.
• Further research into vitamin D supplementation for preventing severe infant bronchiolitis is warranted.