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CHEMOPROPHYLAXIS OF HELMINTH INFECTIONS IN GRAZING RUMINANT ANIMALS ON LOWLY, FILLING PASTURES

Studies were carried out on cattle gobies in one of the farms of the Ivanovo region from May to October. We selected two groups of agelmint animals of 15 heads 11.5–12 months of age. Both groups of animals were grazed on lowland (flood) pastures. The first (control) group of gobies did not receive anthelmintics during the pasture season. Animals of the second (experimental) group were dewormed three times with fenbendazole at a dose of 20 mg / kg in the DV, individually, twice. In the gobies of the control group, for the first time, helminth eggs in the faeces were found in July. During this period, eggs were found to be strangulated, trichocephalic, and moniesia. In August and September, the infection of animals with helminths gradually increased. In October, all the livestock of calves was invaded by nematodes, cestodes, and trematodes. In the animals of the experimental group, by the end of July, moderate invasion by strongylats, trichocephalus and moniesia was registered, so they were subjected to double deworming with fenbendazole. In August, they were free from helminths, and in September, fasciola eggs, nematodes from the strongylata and trichocephalata and moniesia suborders were found in their feces. In September, the animals again dewormed with fenbendazole twice. In October, only trichocephalus eggs were found in the calves' feces. In calves that underwent chemoprophylaxis during the pasture season, average daily gains increased by 53.9 g. (9.47%). In order to reduce losses from helminth infections, young cattle should be dewormed three times while grazing them on lowland, flowing pastures. The first time – in July, the second time – in late August, the third – in September.