Helminth biodiversity and spread peculiarities of helminthiasis of domestic artiodactyls in the Caspian Depression ecosystems

The Caspian Depression is situated on the flat eastern territory of North Caucasus. According to soil and climatic conditions, different ecosystems are neighboring in Depression: lowland moistened areas (up 30% territories), plat steppes (more than 50%), salt marshes 10%), semi-deserts 10%). majority territories used for domestic animal grazing, where more 3 million sheep, goats up 150 thousand heads cattle contained. 46 nosological units helminthiasis agents parasitized ruminants, including 37 species sheep 38 cattle. average temperature winter +12°С; summer – +45°С (210-220 days a year). This region characterized by year-round use land an increase zootechnical standards keeping animals per unit pasture 8 cattle). Moreover, it has rich variety pathogens helminthiasis, similarity most types helminths high number invasive stages biotopes, 95% prevalence mixed invasions dangerous parasitoses.