[Assessment of the heminthologic situation along the route of the Irtysh-Karaganda canal. Public health helminthologic and malacologic studies].

Results of sanitary-helminthological study of soil and population density of the Opisthorchis first intermediate hosts--Mollusca--in the water bodies of the Irtysh-Karaganda canal area are presented. Mean number of soil samples containing Opisthorchis ova constituted 11.76 +/- 2.0% out of 255 samples analyzed; 1.7 +/- 0.14 ova per 100 g of soil; 22 out of 81 stations under study were populated by the Bithynia inflata and B. troscheli molluscs. 0.96 +/- 0.38% of Mollusca from water reservoir No 8 were Opisthorchis invaded, which indicated, along with invasion of fish and human population, revealed by previous studies, the agent's active circulation within the Shiderta invasion focus.