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The aim was to study the epizootological situation, as well as the characteristics of the territories of Kostanay and North Kazakhstan regions on fish opisthorchiasis. The object of the study is the reservoirs of Kostanay and the North Kazakhstan region (rivers Torgai, Tobol, and Ishim). To date, there is a need to develop monitoring methods to assess the epidemiological and epizootological significance of various environmental objects in the transmission of invasive material and the spread of invasions. These studies will contribute to the rationalization of veterinary and sanitary supervision. The conducted studies have allowed us to define the leading factors of the spread of opisthorchiasis in Kazakhstan. A diagnostic algorithm has been developed to improve its efficiency. The results can be used in the organizational and methodological aspects when conducting epidemiological surveillance of opisthorchiasis. The area of the pathogen of opisthorchiasis Opisthorchis felineus covers the territories of Pavlodar, Akmola, Karaganda, Aktobe, and West Kazakhstan regions, extending from the eastern to western borders of Kazakhstan. This disease, according to the Republican Epidemiological Station, has recently been trending upward among the population, which indicates an alarming epidemiological situation in Kazakhstan. As a result of epidemiological monitoring of the incidence of opisthorchiasis in the Kostanay and North Kazakhstan regions, it was found that over the past 10 years (2011-2021), 549 and 29 cases of opisthorchiasis had been registered, respectively. In the Kostanay region, the largest number of cases occurred in 2011 and 2012 (76 and 77 cases, respectively).

This paper presents a retrospective analysis (2012)(2013)(2014)(2015)(2016) of the spread of strongylatosis invasion of horses in the Tyumen region (Russia) in the context of districts. The disease was diagnosed based on the results of coproscopic studies of horse fecal samples using Fulleborn's method in the laboratory of entomoses and helminthiasis of animals of the All-Russian Science and Research Institute of Veterinary Entomology and Arachnology, a branch of the Tyumen Scientific Center of the Siberian Branch of the Russian Academy of Sciences and district state veterinary laboratories of the Tyumen region. The causative agents of horse strongylatosis were identified in the farms of the Abatsky,

The object of research is livestock animals, i.e., sheep (Ovis aries), agents of parasitic diseases of animals (Melophagus ovinus) and drugs used against myiasis of animals. The purpose of the work is to study the possibility of creation of an insecticide composition on the base of fipronil that will be efficient against the sheep ked and to determine its efficiency against Melophagus ovinus. The results, i.e., laboratory experiments to study the efficiency of the insecticide composition abifipr in different concentrations of fipronil, showed that the composition containing 0.5% fipronil and 0.1% abamectin is optimal against the imago of the sheep ked. The application of the dose of insecticide composition abifipr-1 ml per 10 kg of live weight locally once on the skin along the spinal column-provides 100% efficiency against Melophagus ovinus.

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