Abstract
The diversity of the effect of vitamin D on the body is determined by the discovery of vitamin D receptors on a variety of tissues (40 tissues or more) (Wimalawansa S.J., 2018). However, to date, the diversity of the effect of vitamin D on the body in childhood with diabetes mellitus, cardiac pathologies, the effect on immune processes, malignant formations has not been fully investigated. The importance of vitamin D in the formation of the immune system and anti-infective protection in a child is being studied. Indications for diagnosis and correction are being developed, therapeutic and preventive effective doses of vitamin D for children are calculated (Zakharova I.N., 2017). Therefore, the problem of vitamin D deficiency in children with respiratory diseases has determined the purpose of the study to date.Тo study risk factors, vitamin D availability in children, the effect of hypovitaminosis on the course and severity of respiratory diseases. Prospective study of patients of the Department of pulmonology of the DGKB No. 2. 75 patients aged from 1 month to 5 years. I (main) group – 50 children with a low content of vitamin D (25-hydroxyvitamin D) in the blood and II group (control) - 25 children with a level of vitamin D (25-hydroxyvitamin D) in the blood within the normal range. In the study of vitamin D availability in children with respiratory pathology in 40% of children under the age of 1 year of the main group, vitamin D was determined at a deficiency level of 15.63±1.71 ng/ml. In breastfed children without additional vitamin D supplementation, 40% of children were deficient. In the patients of the main group, 40% of mothers suffered from chronic diseases of the gastrointestinal tract. In the control group, only 8% of mothers were found to have morbidity.