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Area of Science:

  • Pediatrics
  • Infectious Diseases
  • Nutritional Science

Background:

  • Tuberculosis (TB) remains a significant global health concern, particularly in pediatric populations.
  • Vitamin D deficiency (hypovitaminosis D) is prevalent worldwide and has been implicated in various immune functions.
  • The relationship between vitamin D status and TB infection in children requires further elucidation.

Purpose of the Study:

  • To investigate and compare vitamin D levels in children diagnosed with latent or active tuberculosis (TB) against a control group of healthy children.
  • To determine the prevalence of vitamin D deficiency, insufficiency, and sufficiency in pediatric TB patients and controls.
  • To assess the association between vitamin D status and the presence of TB infection in children.

Main Methods:

  • A multicenter observational study involving 996 children across three tertiary pediatric centers in Italy and the UK.
  • Serum vitamin D levels were measured, with deficiency defined as <25 nmol/L, insufficiency between 25-50 nmol/L, and sufficiency >50 nmol/L.
  • Multivariate analysis was employed to compare vitamin D levels and assess the risk of hypovitaminosis D between TB-affected children and controls.

Main Results:

  • The study included 44 children with active TB (4.4%), 138 with latent TB (13.9%), and 814 controls (81.7%).
  • A high prevalence of hypovitaminosis D was observed across the entire study population.
  • Children with latent TB showed a 1.61-fold increased risk of hypovitaminosis D (P=0.018), while those with active TB had a 4.587-fold increased risk (P<0.0001) compared to controls.

Conclusions:

  • Hypovitaminosis D is significantly associated with both latent and active tuberculosis infection in children.
  • These findings highlight the potential importance of vitamin D status in pediatric TB.
  • Further research is warranted to explore the role of vitamin D in the prevention and treatment strategies for childhood tuberculosis.