Parasitic contamination of the soil of some territories of the south of Russia was studied for the presence of eggs and larvae of helminths and cysts of pathogenic intestinal protozoa. The soil is still a potential hazard as a risk factor in the infection of the population with geohelminths. Thus, in the Rostov region, the specific weight of the selected soil samples for the period from 2016 to 2020 was 28.2%, of which 25.5% were positive. In the Republic of Adygea, the specific weight of the selected soil samples for the same period was 59.5%, positive – 30.6%. In the KarachayCherkess Republic – 53.8%, positive – 61.9%. The results of the conducted sanitary and parasitological studies of the soil showed that the share of positive samples in various regions of the south of Russia ranged from 20.5% in the Rostov region to 83.3% in the territory of the Karachay-Cherkess Republic. Among all identified helminth eggs, for Toxocara spp. eggs. In all the studied territories, it was 2–3, and sometimes 5 times higher than the eggs of other helminth species detected in the soil. A fairly large number of Strongyloides spp. larvae were also found, mainly in the Republic of Karachay-Cherkessia. According to this, the main role in soil contamination in the south of Russia belongs to animals.

The problem of environmental pollution has now acquired global significance. Helminth eggs in liquid manure laid in open-type sedimentation tanks in October-November, remain viable for 12 months or more, and in spring-summer manure for 4–5 months. Therefore, uninfected liquid manure in both winter and summer poses a serious threat of contamination of reservoirs, soil, groundwater, feed and pastures with dangerous pathogens for humans and animals. This circumstance makes it necessary to carry out disinfestation of manure of all categories. Based on the above, the purpose of the work was to analyze existing methods of manure disinfection and manure effluents. All methods of deworming (disinvasion) of manure and its fractions can be divided into three groups: biological, physical and chemical. It is generally recognized that biological methods for decomposing organic waste are considered environmentally acceptable and cost-effective. Some of the analyzed physical and chemical methods also have a certain effectiveness of disinfection. When using these groups of disinfectants, constant monitoring and compliance with technological parameters is necessary, as well as the norms for the consumption of disinfectants and the exposure time must be observed.