Autoria: BAPTISTA, R. C.; FERNANDES, M. A. M.; GILAVERTE, S.; QUEIROZ, S. C. do N. de; ASSALIN, M. R.; FERRACINI, V. L.; MONTEIRO, A. L. G.; REYES, F. G. R.

Resumo: Abstract: The widespread use of moxidectin (MOX), a parasiticide used in the sheep breeding, has induced the parasite resistance in Brazilian farms. As a consequence, the farmers often increase the dose and frequency of drug utilization, and disregards safety of meat or milk. In order to establish adequate therapeutic treatment it is necessary to know the pharmacokinetics of the drug in the animal's body. Thus, high performance liquid chromatography-electrospray ionization-tandem mass spectrometry (HPLC-ESI-MS/MS) method was developed for the determination of MOX in serum lamb. Serum samples were treated with acetonitrile to precipitate proteins. A clean up by dispersive extraction in solid phase (SPE-d), using primary/secondary amine (PSA) and C18 sorbents, followed by freezing was performed. Method validation presented precision (coefficient of variation) and accuracy (recovery%) between 1.7-6.7 and 80.0-107.3%, respectively. The limit of quantification (LOQ) of the method was 2.0 ng mL-1 and a linear response was obtained over a range of 2.0 to 100 ng mL-1. This method was successfully applied to the determination of MOX in serum from suffolk lamb to evaluate the pharmacokinetic profile.

Ano de publicação: 2017

Tipo de publicação: Artigo de periódico

Unidade: Embrapa Meio Ambiente

Palavras-chave: Anthelmintics, Anti-helmíntico, Análise de laboratório, Blood serum, Cordeiro, Cromatografia, Espectrometria, LC-MS/MS, Lambs, Liquid chromatography, Moxidectin, Pharmacokinetics, Serum lamb, Soro Sangüíneo, Tandem mass spectrometry, Veterinary drugs