[Approaches to predicting the diphyllobothriasis and opisthorchiasis situation in connection with the reconstruction of the water supply economy in the USSR].

The effect of some physical-geographical and anthropogenic factors on the circulation of Diphyllobothriidae and Opisthorchis at the hydrotechnical objects of various regions of the USSR is analysed. It is emphasized that these factors affect primarily the first intermediate hosts of parasites. In opisthorchiasis changes in the intensity of the epidemic process may take place within the limits of mollusca distribution area. In diphyllobothriasis, the area of distribution may be expanded and new foci may be formed with the changes in the river hydroregimen.