[Ultrastructural pathology of the lymph nodes in tick-borne encephalitis].

Lymph nodes of humans and experimental animals with tick-borne encephalitis (TBE) were studied using electron microscopy. TBE virus reproduction occurred in macrophages, reticular and plasma cells. Severe organelle destruction was found in the above cells and lymphocytes. The results suggest that macrophage, reticular and plasmatic cell death is due to the virus reproduction, while lymphocyte death is due to the toxic effect. It is evident that the outcome is determined by pathological process in lymphoid organs.