[Structural-functional changes in the thyroid gland after chronic exposure to the dioxin-containing herbicide 2,4-D].

: White rats were given by lavage 40% solution of the herbicide 2,4-D (as an amine salt) in doses 1.0 and 0.5 mg/kg during 3 months. Destructive changes in follicles, lymphohistiocytic infiltrates, areas with morphological signs of activation (predominance of small follicles), high alkaline phosphatase and glycoproteins activity in thyrocytes were revealed.