GIS technologies in studying the distribution of some bio- and geohelminths in the Central Black Earth Region (by the example of the Kursk and Oryol Regions)

The purpose of the research is to study the distribution of such bioand geohelminths as Spirometra erinaceieuropaei , Trichinella spp., Тохоса r а spp., and Ascaris spp. in the Central Black Earth Region (by the example of the Kursk and Oryol Regions). Materials and methods . From April to November 2024, 321 positive samples were obtained from water, storm drains, soils, and bottom sediments. In the Kursk Region, the studies were conducted in the Kursky, Zheleznogorsky, Dmitrievsky and Solntsevsky Districts; in the Oryol Region, the Dmitrovsky District. The water was tested using a ProboKonG device. The soils, land drainage, and bottom sediments were sampled according to MUK 4.2.2661-10, and the mammals were dissected according to K. I. Skryabin (1938). Electronic maps were created in the Axioma GIS environment with the Google My Maps, Yandex Maps, and Navitel software. Results and discussion . Sparganosis, trichinellosis, ascaridiosis and toxocarosis were found to be widespread in the studied areas. The samples taken from open water sources showed an average contamination with S. erinaceieuropaei eggs of 5.4%, while the lowest amount of infective material of 1.9% was observed in the Kursky District of the Kursk Region, and the highest of 6.6% in the Zheleznogorsky and Solntsevsky Districts, respectively. Infective eggs of Toxocara spp. and Ascaris spp. geohelminths were found in many soil samples. Geohelminth eggs were found in the Kursky and Zheleznogorsky Districts of the Kursk Region, and in the Dmitrovsky District of the Oryol Region. The results were explained by agricultural enterprises located in the studied areas, and the significant anthropogenic load. Among rodents that underwent helminthological dissections in the Solntsevsky District of the Kursk Region, Norway rats ( Rattus norvegicus (Berkenhout, 1769)) infected with Trichinella spp. capsules were found.