SummaryA study screening pet animals (dogs, cats, chinchillas, ferrets, guinea pigs, rabbits, primates, reptiles, and hedgehogs) within Moscow city limits for intestinal parasitic diseases has been conducted over a period of 6 years. According to the study, parasitic infections caused by intestinal protozoa are found in pet animals more frequently than by intestinal helminths. Although dogs and cats exhibit the highest level of diversity of intestinal parasite species, in the group of exotic animals, helminth infection are found much less frequently and parasitic fauna is represented mostly by intestinal protozoa with a high percentage of mixed infection. The most widespread helminth infeсtion of dogs and cats is toxocarosis (respectively 2.5 and 5.7 %) and the most widespread protozoan infection is Giardia sp. (9.8 and 4.6 %). Giardia sp. was found in 47.4 % of chinchillas, Cryptosporidium sp. was more frequently found in ferrets (6.55 %), protozoa from the family Trichomonadida was found in guinea pigs (9 %), Eimeria sp. in rabbits (13.9 %), Acanthocephala in primates (15.7 %), and eggs from the generaOxyurida (59 %), along with protozoa from the family Trichomonadida, in reptiles. Capillaria sp. was most prevalent in hedgehogs (33.4 %). Acanthocephala eggs, as well as protozoa from the Giardia and Entamoeba genera, were more frequently found in primates. Parasites common to animals and humans, which may become a source of infection for the latter under certain conditions, have been identified in pet animals.
Objective: The object of the study was to examine the major pharmacokinetic parameters after a single application of a complex drug preparation for veterinary use based on fipronil, praziquantel, moxidectin, and pyriproxyfen in cats and dogs. Materials and Methods: For dogs, the drug preparation was administered spot-on solution in the following dosage of active pharmaceutical substances: fipronil 27.0 mg/kg body weight (bwt), praziquantel 10.8 mg/kg bwt, moxidectin 6.75 mg/kg bwt, and pyriproxyfen 5.4 mg/kg bwt; for cats, the dosage was the following: fipronil 43.2 mg/kg bwt, praziquantel 17.28 mg/kg bwt, moxidectin 4.32 mg/kg bwt, and pyriproxyfen 8.64 mg/kg bwt. The blood samples were taken from dogs and cats. The principle of the method for determining praziquantel, trans-4-hydroxypraziquantel, pyriproxyfen, and fipronil in serum samples was chromatographed in a high-pressure liquid chromatograph with detection by means of a mass-spectrometric detector. The moxidectin content of the blood was detected by high-performance liquid chromatography. Results: The drug preparation active substances: praziquantel, fipronil, and moxidectin are absorbed into the blood of dogs and cats. The penetration of praziquantel into the systemic circulation and further into organs and tissues was proved. After topical administration, moxidectin is absorbed and distributed systemically and is slowly removed from the plasma, which manifests itself in detectable concentrations of moxidectin in the blood for 1 month. Conclusion: The present results of pharmacokinetic investigations may promote to the determination of effective therapy strategy and prophylaxis of parasitic diseases in dogs and cats.
Background: A supramolecular complex of praziquantel (PZQ) with disodium salt of glycyrrhizic acid (Na2GA) was obtained by mechanochemical technology to increase solubility, absorption rate and hence bioavailability of the drug and reduction its therapeutic doses. The aim of our study was evaluation of anthelmintic efficacy of supramolecular complex of PZQ. Methods: Different samples of PZQ with Na2GA were obtained by mechanochemical processing and examined for some physico-chemical properties. The anthelmintic activity of the most perspective samples was studied on the laboratory model of Hymenolepis nana infection of mice and Moniezia expansa infection of sheep by the results of helminthological necropsy of the small intestines (the controlled test). Results: A high efficacy (> 98%) of supramolecular complex of PZQ with Na2GA (1/10) was shown at doses of 3; 2 and 1 mg/kg of body weight at single oral administration against H. nana in mice and M. expansa in sheep. While the basic PZQ had 27.19% and 36.64% efficacy respectively at the dose of 1 mg/kg. The PZQ:Na2GA 1/10 physical mixture (without mechanochemical processing) revealed no anthelmintic efficacy. Conclusion: Joint mechanochemical treatment the PZQ substance and Na2GA led to increased solubility, reduction of particle sizes, amorphization of substance, incorporating it with micelles of glycyrrhizic acid and high anthelmintic efficacy in reduced dose. The supramolecular complex of praziquantel was found to be a perspective anthelminthic with enhanced pharmacological activity that needs further research.
The purpose of the research is conducting pharmaco-toxicological assessment of Gelmintal Mini Syrup based on a combination of moxidectin and toltrazuril. Materials and methods. The study was carried out on 64 white male rats and 40 white mice. Each animal species was divided into 4 equivalent groups of 6–10 animals each. When studying acute toxicity, the drug was administered in the form of a syrup (without dilution) to animals once at doses of 11 400, 22 800 and 28 500 mg/kg; when studying subchronic toxicity, the drug was administered daily for 14 days at doses of 570, 1425 and 2850 mg/kg (1/10 and 1/20 and 1/50 of the maximum possible dose administered into the stomach according to the vivisection results). When studying acute toxicity, the animals were followed up for 14 days; we recorded the general condition and behavior of the animals, changes in their body weight, the manifestation of toxic symptoms or possible death. When studying subchronic toxicity, the animals were followed up during the entire period of the drug use (14 days); on the 15th and 24th days of the experiment, we performed euthanasia, collected the blood to determine hematological and biochemical values, and carried out macroscopic examination of the organs. Results and discussion. We did not record the animals’ death at doses of 11 400, 22 800 and 28 500 mg/kg; and no signs of intoxication were noted for the entire follow-up period. LD50 of Gelmintal Mini Syrup exceeds the dose of 28500 mg/kg, i.e. the drug is classified as the 4th hazard class. The results of the studied subchronic toxicity showed that the drug was inactive at doses of 570 mg/kg, 1425 and 2850 mg/kg when administered orally for 14 days.
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