The purpose of the research is to study the effect of the new antiparasitic 2.0% Equiverm in high doses on the clinical state of horses.Materials and methods. The experiment was conducted on 15 two-year-old crossbred horses weighing up to 300 kg spontaneously infected with Strongylata. To determine the effect of the antiparasitic paste on the horses, three groups of five horses each were formed. The first group of the horses was administered 2.0% Equiverm at a therapeutic dose; the second, at a three-fold increased dose, and the third, at a five-fold increased dose (0.2; 0.6 and 1.0 mg/kg for the active substance (AS), and 1.0; 3.0 and 5.0 mL per 100 kg of body weight for the drug). The horses’ clinical state was studied using standard methods. Blood samples for the study were taken from the jugular vein before the drug on the first, third and seventh days. The results obtained were statistically processed using the computer tool Microsoft Excel 2007.Results and discussion. It was found that the antiparasitic paste 2.0% Equiverm had no negative effect on clinical, hematological or biochemical parameters after a single oral administration at a therapeutic, three- and five-fold increased dose (0.2; 0.6 and 1.0 mg/kg for the AS, and 1.0; 3.0 and 5.0 mL per 100 kg of the body weight for the drug).
Всероссийский научно-исследовательский институт фундаментальной и приклад ной паразитологии животных и растений -филиал Федерального государственного бюджетного научного учреждения «Федеральный научный центр -Всероссийский научно-исследовательский институт экспериментальной ветеринарии имени К. И. Скрябина и Я.
The purpose of the research is to test different dehelminthization schemes of laboratory rats infected with cestodes Rodentolepis nana and nematodes Syphacia muris and evaluate the significance of combined environment disinfection measures. The practical experience of eradication (helminth eradication) in animals in a conventional vivarium was described.Materials and methods. Experiments were conducted to study the efficacy of anthelmintics and administration schemes against cestode and nematode infections in laboratory rats. In the first experiment, praziquantel was used at a dose of 10 mg/kg to treat rats infected with R. nana. In the second experiment, the comparative efficacy of fenbendazole, albendazole, and pyrantel was evaluated against syphaciosis at the recommended dosages of 20, 10, and 12.5 mg/kg, respectively. Each drug was given orally, individually, twice with an interval of 7 days. The third experiment tested different schemes for treating syphaciosis with fenbendazole. One group of rats was given the drug orally individually using an esophageal tube at a dose of 20 mg/kg once a day for 7 consecutive days. Other groups were given fenbendazole daily with food for 7 days (150 mg fenbendazole per 1 kg of food). In all three experiments, all animals were divided into groups, and their cells underwent a complex of additional disinfection measures, and those kept in cages without disinfection.Results and discussion. Praziquantel showed 100% efficacy at a single dose of 10 mg/kg in R. nana therapy. In animals without additional disinfection procedures, cestode eggs were again recorded starting from day 14 after the drug administration. In the group of animals with disinfection measures, pathogens were not detected during the experiment. Double administration of fenbendazole, albendazole and pyrantel in the recommended dosages against syphaciosis did not result in eradicated nematodes in the animals. The disinfection did not affect the obtained results. Fenbendazole administered daily for 7 days ensured helminth eradication in animals. However, on day 7 after the therapy, Syphacia sp. eggs were again found in the groups that received the drug individually intragastrically through a tube, regardless of whether their cells were disinfected. The animals that received fenbendazole with food and were regularly disinfested remained free from nematodes throughout the experiment until the additional disinfection measures were cancelled. In the absence of disinfection, released helminth eggs were recorded on day 14 after therapy.
The purpose of the research is to develop a methodology for Equiverm-2.0% paste used against equine parasite infections.The methodology provides a brief description of Equiverm-2.0%, mechanism of its action, pharmaco-toxicological properties, application, slaughter terms, and personal safety measures. Equiverm-2.0% antiparasitic paste consists of the active ingredient, ivermectin, and excipients; it is a light cream-coloured paste with a slight pine odor and sweetish taste. The drug is administered orally at a therapeutic dose of 0.2 mg/kg for the active substance. One gram of paste is equal to 1 mL in volume with 20 mg of ivermectin. Ivermectin in Equiverm-2.0% paste is in a dissolved form, and forms an intermolecular complex. The antiparasitic paste is packaged in disposable polyethylene syringe dispensers of 5 or 10 mL, respectively, 4 to 8 g each, per treated horse weighing 400-800 kg. When administered orally, the paste spreads in the oral cavity and the animal eats it with pleasure due to its sweetish taste. The drug is recommended for registration in the Russian Federation.
The purpose of the research is to study the effect of syphaciosis on biochemical and clinical blood parameters of outbred rats.Materials and methods. Outbred male rats weighing 180–200 g were examined for helminth eggs by coproovoscopy and a Scotch tape test using a microscope Micromed 1 ver. 2-20. A biochemical blood assay was conducted on a Beckman Coulter DxC 700AU analyzer (USA), and a haematology test panel was made on a PCE 90-Vet analyzer (USA). Fenbendazole was used for preventive dehelminthization. Statistical processing was performed using the software Studet200.Results and discussion. The study results on biochemistry and hematology of the outbred rats’ blood showed a significant decrease in LDH levels and an increase in hematocrit in the animals infected with Syphacia spp.
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