Study of the therapeutic efficacy of DOKSI AVZ 500 in bacterial respiratory diseases in young pigs.

Background: Young farm animals are susceptible to opportunistic infections which may cause economic losses due to mortality and poor weight gain. The development of antimicrobial resistance and the desire to improve therapy efficacy and safety are the reasons to seek for new antibacterial drugs ensuring rapid recovery with minimum adverse events. Aim: To estimate the efficacy of DOKSI AVZ 500 in respiratory pathologies in young pigs. Methods: The study was conducted in 65-70-day-old Yorkshire piglets with signs of bacterial respiratory pathologies. The animals were treated with the test drug for 3 or 5 days. The reference group received TETRAMAX 500 which is similar to the test drug in terms of chemical structure, mechanism of action, and activity spectrum. The animal's status was assessed using clinical examination, clinical blood count, and bacteriological tests. Results: Both test and reference drugs were well tolerated and ensured the animal recovery within about 4 days. The recovery was accompanied by normalization of hematological parameters and flora composition. The bacterium associated with the disease development, Streptococcus suis, was virtually completely eliminated in all groups. No adverse events were noted. After the treatment, all the animals readily gained weight and live market quality. Conclusion: DOKSI AVZ 500 was a highly efficient therapy for respiratory pathologies caused by the resident opportunistic flora in piglets. It has also shown noninferiority vs. TETRAMAX 500 in terms of all the health-related parameters and thus can be recommended for introduction in veterinary practice in pig farms.

Anthelmintic Efficacy of Supramolecular Complex of Praziquantel Obtained by Mechanochemical Technology.

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.

Influence of mechanochemical technology on anthelmintic efficacy of the supramolecular complex of fenbendazole with polyvinylpyrrolidone.

OBJECTIVE: The purpose of our research was to evaluate the effect of mechanochemical technology on the efficacy of supramolecular complex of fenbendazole (SMCF) with polyvinylpyrrolidone (PVP) polymer against some helminthosis of animals. MATERIALS AND METHODS: The SMCF samples with PVP were synthesized using a solid-state mechanochemical technology in activators of impact-abrading type and their physicochemical properties were analyzed. The efficacy of SMCF was studied on the laboratory model of Hymenolepis nana and Trichinella spiralis infection of mice and helminthosis of sheep. RESULTS: In the trials conducted on laboratory models, the supramolecular complex showed 93.94% and 98.56 % efficacy at the dose of 1 mg/kg of body weight (b/w), while the substance of fenbendazole showed 7.97% and 8.33% efficacy at the same dose. A high efficacy (>94%) of the SMCF was revealed at the dose of 2.0 mg/kg of b/w at oral administration against nematodes in naturally infected sheep by the results of the fecal examination, while the substance of fenbendazole was active at the dose of 5.0 mg/kg at single oral administration. Moreover, the SMCF demonstrated 97.37% efficacy at the dose of 2 mg/kg against Moniezia spp. infection of sheep. Physicochemical studies confirmed the increase in solubility of the complex, reducing of particle sizes, amorphization of fenbendazole substance, and incorporating it with micelles of PVP. CONCLUSION: According to the results, supramolecular complex of fenbendazole with PVP was more active than the basic substance of fenbendazole and its anthelmintic properties were expanded.

The efficacy of the supramolecular complexes of niclosamide obtained by mechanochemical technology and targeted delivery against cestode infection of animals.

Niclosamide is an anthelmintic that is widely used to treat cestode infection of animals. The efficacy of the supramolecular complexes of niclosamide obtained by mechanochemical technology and targeted delivery was studied in hymenolepiosis of mice and monieziosis of sheep. The efficacy of new substances of niclosamide with polyvinylpyrrolidone polymer in different ratios (1:10; 1:5; 1:2) was determined by the results of helminthological necropsy of the small intestine of sheep and mice. Pre-treatment eggs per gram (EPG) were not significantly different (P>0.1) among groups. The controlled test was used to evaluate the efficacy. A high efficacy (>95% efficacy) of the supramolecular complexes of niclosamide with PVP (SCoNwPVP) was shown in different ratios (1:10; 1:5 and 1:2) at a dose of 20mg/kg of body weight at oral administration against Hymenolepis nana in mice and Moniezia expansa in sheep. Whereas the basic drug - substance of niclosamide was effective at a dose of 100mg/kg of b/w. No adverse effects of the drugs on animal health were detected during the study.