Аннотация
The research was aimed at determining the epizootology of main helminthiases in cattle in the steppe, semidesert, and desert zones of the West Kazakhstan region in various seasons in various age groups.Cattle infestation with helminths was determined using the Fülleborn's method.Thelazia were washed from the conjunctival sac with a solution of boric acid.To detect the cysts of larval cestodiases, parenchymatous organs were examined.In the West region of Kazakhstan, the extensity of cattle infestation with main types of helminths was as follows; Moniezia expansa (14.2 %), Echinococcus granulosus (larvae, 35.8%),Nematodirus spp.(35%), Ostertagia spp.(60.5%),Cooperia spp.(55.1%),Haemonchus spp.(22.4%),Trichostrongylus spp.(22.6%), and Thelazia rhodesi (35.8%).The seasonal and age dynamics of cattle infestation with helminths is significantly affecting their prevalence in this region.The maximum infestation of the animals with Moniezia, digestive tract Strongylata, and Thelazia was observed in the summer and the autumn seasons, while the minimum infestation was in the winter and the spring seasons.Moniezia Strongylata.Cattle in the West Kazakhstan region are infested with Moniezia, Echinococcus, Strongylata of the digestive tract and Telazia.These helminthiases have seasonal and age-related dynamics of invasion.Our results describe a comparative analysis for cattle infestation with the common types of helminths in the steppe, semi-desert, and desert zones of the West region of Kazakhstan with consideration for the season and age dynamics of animals' infestation with helminths in these zones.