THE OBJECTS OF THE NATURAL ENVIRONMENT, AS FACTORS OF TRANSMISSION OF PARASITOSIS

Abstract

Sanitary parasitological study of the contamination of environmental objects as factors of parasitosis transmission is an important element of sanitary and hygienic monitoring. Using sanitary-parasitological methods of research of environmental objects in 2018, wastewater and its sediments, soil and water of open surface water bodies as the main factors of parasitosis transmission were studied in the territory of the Rostov region and the Republic of Adygea. Screening works were carried out to indicate 137 objects of the surrounding environment that the parasitosis pathogens infected. Extensive and intensive indicators of the contamination of objects with the ascertained viability of the identified parasitic pathogens were determined. Wastewater and its sediments turned out to be the most epidemiologically significant objects, as evidenced by the level of contamination of these substrates with parasitic pathogens and to a greater degree the share of viable helminth eggs detected among them. The spectrum of parasitic pathogens detected in both territories in sewage and sediments was as follows: tokocar eggs (more than 50%), ascaris eggs, pinworms, taeniid oncospheres, ankylostomid eggs, dicrocelium, diphyllobotriid. The soil remains one of the main components of the environment, of great importance in the spread of parasitic invasions. In the studied areas, the ovogram of detected parasitic pathogens in the soil was almost identical: eggs of ascaris, tokocar, pinworms, etc. In addition, the maximum epidemiological significance of the soil was established for geo-and contact helminth infections in respect of the territories of residential areas of settlements, pre-school institutions. The investigated water samples of open surface reservoirs contained only non-viable helminth eggs with low contamination intensity (1–2 specimens / 25 l.).