Ecological and epizootological characteristics of larval and imaginal cestodosis of animals in the south of Western Siberia

Larval and imaginal cestoda in sheep cause significant economic damage to sheep breeding. At the same time, in the absence of a systematic fight against these diseases, the damage increases significantly, but a successful fight against pathogens is not possible without knowledge of the epizootology of helminthiases in sheep in a given area. In modern conditions, the creation of diversified farms in the countryside, when the main livestock is concentrated in the backyards of cooperative farms and peasant farms, the problems of combating parasitic diseases have become particularly relevant. The purpose of the work is to study the ecological features and distribution of larval and imaginal cestoda. The work was carried out by clinical examination of sheep, autopsy of corpses, verification of acts on autopsies of animals, interviewing shepherds about the incidence of coenurosis in sheep, checking the number of flock’s dogs. The state of registration of shepherd and village dogs, the frequency, methods and means of deworming dogs, compliance with the rules for the disposal of corpses, and the procedure for slaughtering animals were revealed. As a result of the conducted studies of carnivores, the infection with helminths was 97 %. In total, 12 types of helminths were found in dogs: cestoda 9, nematodes 3. Cysticerci are localized on the omentum, mesentery, and liver of herbivores. The causative agent is the larval stage of the the cestoda - Tenia hydatigena. During the period of migration of larvae, the disease is acute, severe and often leads to death of young animals. Cysticercosis in one-year-old lambs manifests itself in January and February in the form of hepatitis. Thus, according to the data of the flock examination of sheep, according to the results of the analysis of veterinary reports and acts on the disposal of animals in farms, as well as according to the autopsy data, it was found that sheep coenurosis is common in all climatic zones of the Altai Region. During the veterinary and sanitary examination of the examined 598 carcasses of small cattle, Cysticercus tenuicollis larvae were found in 223, which is 37.3 %.