Farmacocinética e eficácia endectocida de uma nova formulação contendo doramectina 3,5% em bovinos
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Data
2013-02-26
Autores
Righi, Thalita Silveira [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Uma nova formulação medicamentosa contendo doramectina 3,5%, administrada vias subcutânea e intramuscular, na dose de 1mL/50kg de peso corporal (700 μg/kg), foi avaliada em quatro experimentos. No primeiro experimento foram determinados parâmetros farmacocinéticos em plasma de bovinos machos e fêmeas. Quanto à atividade carrapaticida, foram conduzidos dois ensaios, um utilizando bovinos com infestação experimental e outro com animais naturalmente parasitados por Rhipicephalus (Boophilus) microplus. A eficácia anti-helmíntica da referida formulação foi avaliada em 12 bovinos necropsiados portadores de nematodioses gastrintestinais (infecção natural). Para a determinação dos parâmetros farmacocinéticos, as amostras de plasma foram examinadas por meio de cromatografia líquida de ultra eficiência. Os resultados obtidos mostraram que não houve interferência da via de administração nos parâmetros Cmax, AUC (0-t), AUC (t- ), AUC (0- ) e MRT. Valor de T1/2 el foi significativamente superior quando a nova formulação foi administrada via subcutânea. A concentração plasmática máxima, foi atingida mais rapidamente nos animais tratados via intramuscular. A eficácia antiixodídica da nova formulação doramectina 3,5% (stall test) alcançou índices superiores a 95% em 21 datas experimentais. A ivermectina 3,15% e a moxidectina 10% atingiram percentuais de eficácia acima de 90%, em 30 e 11 datas, respectivamente. O número de teleóginas desprendidas dos grupos tratados com doramectina 3,5% e moxidectina 10%, não diferiram estatisticamente (P>0,05) ao longo de todo o experimento. Estas duas formulações foram estatisticamente superiores (P<0,05) à ivermectina 3,15% em 27 e 16 datas pós-tratamento. Os efeitos deletérios da doramectina 3,5% sobre a performance reprodutiva de teleóginas, foram estatísticamente...
A new drug formulation containing 3.5% doramectin, administered subcutaneous or intramuscular dose of 1mL/50kg body weight (700 mg / kg) was evaluated in four experiments. In the first experiment were determined in plasma pharmacokinetic parameters of male and female cattle. Regarding the activity ticks were conducted two experiments, one using experimental infestation with cattle and other animals with naturally parasitized by Rhipicephalus (Boophilus) microplus. The anthelmintic efficacy of this formulation was evaluated in 12 cattles with necropsied nematodiosis gastrointestinal (natural infection). For the determination of pharmacokinetic parameters, plasma samples were analyzed by liquid chromatography ultra efficiency The results showed that there was no interference route of administration of the parameters Cmax, AUC (0-t), AUC (t- ) AUC (0 - ) and MRT. Value T1/2 el was significantly higher when the new formulation was administered subcutaneously. The maximum plasma concentration was reached earlier in the animals treated intramuscularly. The efficacy of anti-ixodídica new formulation doramectin 3.5% (stall test) levels reached greater than 95% in 21 experimental days. The moxidectin and ivermectin 3.15% percentage reached 10% efficiency above 90% in dates 30 and 11 respectively. The number of detached ticks groups treated with 3.5% doramectin and moxidectin 10%, not statistically different (P> 0.05) throughout the experiment. These two formulations were significantly higher (P <0.05) at 3.15% ivermectin in dates 27 and 16 post-treatment. The deleterious effects of doramectin 3.5% on the reproductive performance of engorged females were statistically superior (P <0.05) at the 3.15% ivermectin. A new formulation and doramectin 1% significantly reduced (P <0.05), scores of females... (Complete abstract click electronic access below)
A new drug formulation containing 3.5% doramectin, administered subcutaneous or intramuscular dose of 1mL/50kg body weight (700 mg / kg) was evaluated in four experiments. In the first experiment were determined in plasma pharmacokinetic parameters of male and female cattle. Regarding the activity ticks were conducted two experiments, one using experimental infestation with cattle and other animals with naturally parasitized by Rhipicephalus (Boophilus) microplus. The anthelmintic efficacy of this formulation was evaluated in 12 cattles with necropsied nematodiosis gastrointestinal (natural infection). For the determination of pharmacokinetic parameters, plasma samples were analyzed by liquid chromatography ultra efficiency The results showed that there was no interference route of administration of the parameters Cmax, AUC (0-t), AUC (t- ) AUC (0 - ) and MRT. Value T1/2 el was significantly higher when the new formulation was administered subcutaneously. The maximum plasma concentration was reached earlier in the animals treated intramuscularly. The efficacy of anti-ixodídica new formulation doramectin 3.5% (stall test) levels reached greater than 95% in 21 experimental days. The moxidectin and ivermectin 3.15% percentage reached 10% efficiency above 90% in dates 30 and 11 respectively. The number of detached ticks groups treated with 3.5% doramectin and moxidectin 10%, not statistically different (P> 0.05) throughout the experiment. These two formulations were significantly higher (P <0.05) at 3.15% ivermectin in dates 27 and 16 post-treatment. The deleterious effects of doramectin 3.5% on the reproductive performance of engorged females were statistically superior (P <0.05) at the 3.15% ivermectin. A new formulation and doramectin 1% significantly reduced (P <0.05), scores of females... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Bovino - Parasito, Helminto, Rhipicephalus, Fármacos, Farmacocinética, Parasitologia veterinaria, Drugs
Como citar
RIGHI, Thalita Silveira. Farmacocinética e eficácia endectocida de uma nova formulação contendo doramectina 3,5% em bovinos. 2013. xiv, 58 p. Dissertação (mestrado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, 2013.