Efficacy of solid dispersion of fenbendazole and ivermectin based on licorice extract for therapy of sheep with parasitic invasions

Background.The zooparasitic complex of sheep in the Altai Mountains is characterized by diversity and is represented by almost all the main classes of pathogens of invasive diseases – nematodes, trematodes, cestodes and parasitic arthropods. Purpose.To develop and characterize the parasiticidal activity of a new complex therapeutic agent with a broad spectrum of action, allowing for minimization of the volume and frequency of drug use. Materials and methods.Using the methods of mechanochemical modification of fenbendazole (FBZ) and ivermectin (IVM) substances with the help of licorice extract (LE), compositions in the form of solid dispersions with increased solubility were prepared. The compositions were studied against helminths of the gastrointestinal tract on spontaneously infested sheep. Experimental and control groups of animals were formed, consisting of 7-20 heads. Feeding was carried out with samples of compositions with different doses of substances. Results.Parasitic activity was characterized by ovoscopic examinations of fecal samples of experimental and control animals. It was established that the parasitic agent in the form of a solid dispersion obtained from fenbendazole and ivermectin with licorice extract, in a dose of FBZ (3 mg / kg of animal weight), IVM (0.2 mg / kg of animal weight) showed 100% effectiveness in strongylosis of the gastrointestinal tract and respiratory system, as well as in monieziasis and dicrocoeliasis of sheep. The insecticidal effectiveness of the drug in melofagosis was 89.5%. Conclusion.By means of mechanochemical modification of the substances of FBZ and IVM in the presence of licorice extract, a complex therapeutic drug was obtained that has increased solubility and a wide spectrum of parasiticidal activity, allowing to minimize the volume and frequency of drug application.