[Supply of iron and status of immunologic reactivity in older schoolchildren at various times of the year]. / Obespechennost' zhezom i sostoianie immunologicheskoi reaktivnosti u starshikh shkol'nikov v raznoe vremia goda

The content of iron in foods consumed by schoolchildren in winter was found to be much lower than the recommended one. In summer dietary iron consumption proved to be twice less than that in winter and 3 times less than the physiological allowance for this age. The indices of cellular and humoral immunity during a school year changed in diametrically opposite direction: increases in the count of T and B lymphocytes in winter and, especially, spring months were attended by a concurrent and significant reduction in the content of immunoglobulins G, M, and A. There was a significant rise in the indices of phagocytosis in winter as compared to autumn and their drastic reduction in spring as compared to winter.