[Problem of toxoplasmosis]

The paper presents brief characteristics of the causative agent and methods of its detection in tissues. The time course of the development of morphological changes in the central nervous system (CNS) is characterized on the basis of the authors own studies. In particular, the possibility of formation of congenital CNS defect upon intrauterine infection with toxoplasma has been demonstrated. A direct correlation between the results of morphological and biochemical examinations of the CNS has been found. A case of toxoplasmosis developing postnatally as a result of exogenous infection with a description of the primary focus in the lungs is presented.