[ABNORMALITIES OF THYROID HORMONE METABOLISM DURING COMMUNITY‒ACQUIRED PNEUMONIA: NONTHYROIDAL ILLNESS SYNDROME AND INTRACELLULAR IODINE DISTRIBUTION IN CHILDREN].

The aim of the study ‒ to investigate the changes of thyroid function and to reveal the relationship in between intracellular distribution of iodine in the blood with the severity of the course of pneumonia in children. We investigated 70 patients in age 6-14 years with moderate and severe CAP and 35 healthy children. The levels of free thyroxine (fT4), free triiodo-thyronine (fT3) and thyroid stimulating hormone, thyroid gland ultrasound and urinary iodine were estimated. Inorganic iodine, total and organificated iodine was investigated. The article presents that severe pneumonia in children is characterized by a transient low level of fT3 2,89 pmol/L (p˂0,05). In a dynamics initially low levels of fT3 raise up to normal data. The general condition and clinical symptoms of the patients was improving after treatment of pneumonia and thyroid status was normalized. Mild iodine deficiency has been established in all children. The intracellular pool of iodine with severe pneumonia showed an inverse relationship between the levels of iodine distribution for organificated and inorganic iodine and a close connection between the levels of total and organic iodine (p<0,001). Nonthyroid illness syndrome developed for patients with severe community-acquired pneumonia. The revealed changes in indices of the intracellular pool of iodine and its distribution in the body are directly proportional to the severity of CAP.