[The search for agents with a nontraditional mode of action for the disinfection of environmental objects in parasitoses].

The ovicidal effects of 3 agents: hydrogen peroxide, pantocidum, and Bingsti derived from plant materials (Russia's patent No. 2062752 in 1996) were tested. The findings suggest that pantocidum and hydrogen peroxide were ineffective when used in the tested doses for decontamination.

[The conditions for the possible formation of foci of diphyllobothriasis on the lower Don].

There are conditions for forming a diphyllobothriasis focus in the basin of the lower Don. In terms of the population affliction, low risk for its infection and the size of copepods, the focus is differentiated as an Oligocopepoda one of low epidemiological intensity. Its formation is favoured by the activation of the population's migration, favourable ecological and biological conditions for the existence of intermediate and supplementary hosts, the population's habit of having ill-disinfected fish, the pathways of infected material delivery into the reservoirs, the survival periods for broad tape-worm eggs, which are sufficient for diphyllobothriasis pathogens to develop their biological cycle under the conditions of Rostov Province.

[The potential for using an integrated method of soil disinfection in microfoci of geohelminthiases].

Polycarbocin-lupine and polycarbocin-pea systems were found to exert a marked ovicidal effect providing decontamination of the top soil layer from ascarid eggs for 3 months. A combination of 4-5 mg of polycarbacine and 25-30 lupine or 20-30 pea plants per m2 was found the optimal. If combined with pea, 3 g of the agent is sufficient.

[The use of pesticides in disinfecting soil from ascaris eggs].

Low-toxicity pesticides--polycarbazin and prometrin--are suggested for use in decontamination of helminths' invaded soils. Soils in the invasion foci and microfoci should be treated with pesticides dosed at 50 g/5 l of water per 1 m2, in autumn, after the crop, and in early spring after the snow melt, with respect to the periods of maximal accumulation of helminths' ova in soil and preparations' degradation period (about 6 months).