| Summary: | Currently, more than 300 species of helminths and more than 50 protozoa are known to cause diseases in humans. Helminthiases are widespread among the world's population. According to modern WHO estimates, ¼ of the world's population is infected with intestinal parasites [1; 2; 3; 4]. Parasitic diseases are especially common in tropical and subtropical regions of Asia, Africa and Latin America, where most of the world's population lives. It occurs even beyond the Arctic Circle (Kola Peninsula, Taimyr, Yamal), so intestinal helminthiases are an urgent public health problem. These diseases lead to poor health and well-being in poor countries around the world [5; 6; 7]. It was recognized that the main risk group for these diseases are children of school and adolescence, regardless of the region. The prophylactic use of anthelmintic drugs in these groups is part of the national policy of some countries with endemic regions [8; 9].
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