[Prevalence of toxocariasis in rural and urban areas].

The prevalence of toxocariasis was studied among different age groups of the population in eight municipal entities of the Sverdlovsk Region. Since 1995, the number of infected patients was shown to have annually increased by 1.4-2 times and amounted to 2.

[The oncogenic action of nonfibrous mineral dusts].

Nonfibrous mineral dusts antigorite, basalt, cement, zeolite-klinoptilolite and gamma-alumina were tested for carcinogenic activity in rat experiments. Intraperitoneal injections of zeolite-klinoptilolite and gamma-alumina led to development of peritoneal mesotheliomas, whereas antigorite and cement had no carcinogenic potential. There is no differences in physicochemical and chemical properties between carcinogenically active and inactive nonfibrous dusts.