Effectiveness of an anthelmintic agent as part of a mineral-salt additive on parasites in maral stags during the summer grazing period

The purpose of the study is to determine the effective dose of an antiparasitic drug as part of a mineral-salt supplement for maral stags during the summer grazing period. To eliminate the factor of disturbance of maral stags during the summer grazing period, artificial salt licks with the addition of the agent Helmicid and chalk were used for the prevention and treatment of invasive diseases. In the experiment, an effective dose of the anthelmintic agent Helmicid was established in a mineral-salt mixture on maral stags during the summer grazing period. Maral stags (n = 92) in the park's salt licks, in the amount of two, were given a mineral-salt mixture weighing 13.662 kg at the rate of 45.0 g of the agent Helmicid per animal. A control group of marals (n = 100) was fed a mixture of salt and chalk in similar salt licks from May to September. Before feeding the mixtures, the stags of both experimental groups were diagnosed with elaphostrongylosis, gastrointestinal strongylate, trichuriasis and dicrocoeliosis. Elaphostrongylosis infestation in the experimental group decreased by 4 times, gastrointestinal stasis by 2.5 times, and dicrocoelia by 6 times. In the control group of maral stags, there was an increase in the number of animals affected by elaphostrongyliasis by 2.5 times, eimeriosis by 2.0 times, gastrointestinal stasis by 1.3 times, trichocephalosis by half, the number of staghorns affected by dicroceliosis was at the same level. The effectiveness of feeding maral stags with an antiparasitic mineral-salt mixture containing the agent Helmicid during the summer-grazing period was shown for trichuriasis 100 % with an intensity of 100 %, dicroceliosis 84 % with IE 97 %, elaphostrongylosis 80 % with IE 97%, gastrointestinal stasis - 63 % with IE 95 %. The dosage of the agent Helmicid is 45.0 g/animal. showed good effectiveness against the main invasive diseases, preventing them throughout the summer grazing period.