Determinação de cobre e outros minerais em caprinos e ovinos criados no sertão do vale do rio São Francisco, Pernambuco

Abstract

RESUMO.-Para a determinação dos teores de cobre e de seus antagonistas, foram utilizadas 160 amostras de soro e de fígados, de caprinos e ovinos enviados ao matadouro municipal de Petrolina. As amostras de fígado e soro foram correlacionadas para o mesmo animal, a fim de evitar erros na obtenção dos dados. No soro a atividade da ceruloplasmina foi determinada por método colorimétrico. Para a determinação dos minerais, as amostras foram diluídas de seis a vinte vezes com água Milli-Q. Para determinação das concentrações dos elementos minerais no fígado, as amostras foram digeridas até que se obtivesse uma solução que mantivesse os minerais da amostra inicial e que fosse totalmente liquida, sem a presença de partículas sólidas que pudessem obstruir os capilares de sucção do espectrômetro e assim impedir as leituras das amostras. As concentrações de cobre, molibdênio, ferro e zinco foram determinadas através de espectrometria óptica por emissão de plasma (ICP). Desta forma, foi conduzido o experimento objetivan- For the determination of copper concentration and its antagonists, 160 serum and liver samples were used, from goat and sheep sent to the municipal slaughterhouse of Petrolina. The samples were correlated with the same animal, in order to prevent errors in data collection. Serum ceruloplasmin activity was determined by colorimetric method. For determination of minerals, the samples were diluted six to twenty times with Milli-Q water. For determining concentrations of mineral elements in the liver, the samples were digested until achieving a solution that maintained the initial sample and minerals totally liquid, without the presence of solid particles which could clog the capillary suction of the spectrometer and prevent reading of samples. The concentrations of copper, molybdenum, iron and zinc were determined by optical emission spectrometry (ICP). Thus, the experiment was conducted to determine the occurrence and distribution of copper deficiency in the San Francisco valley of Pernambuco. No copper deficiency was revealed in this region of the state of Pernambuco, when the mean levels of hepatic copper were evaluated. Zinc levels were within a normal range, whereas iron levels were higher in sheep, and lower levels of molybdenum in goats. It was also found that the activity of ceruloplasmin was an indicator of serum copper.

Mineral contents in bone and liver of sheep with or without periodontitis

“…The liver Zn concentrations were superior to the values found by Silva Júnior et al (2015), Tokarnia et al (1999) and by Antonelli et al (2016). These authors found 118, 101 -128, and 115-143mg of Zn per kgDM, respectively.…”

“…The average levels of hepatic Fe did not differ between the three groups (Table 1). These values were higher than the value of 245±108mg/kgDM, described by Silva Júnior et al (2015) and the levels of 156.1 to 210.5mg/kgMS, verified by Marques et al (2011). These higher values are possibly related to high Fe intake, either in the mineral mixture or in the forage consumed by the animals.…”

Outbreak of enzootic ataxia in goats and sheep in the state of Bahia

“…Subsequently, other studies were performed in PE using a serum and hepatic copper dosages, one in the Araripina region. A primary marginal copper deficiency was found in 141 goats and 141 sheep (Marques et al 2011) and another in backcountry (Sertão region) of the São Francisco river valley (Silva Junior et al 2015). However, in this last study, the dosages performed in 80 goats and 80 sheep did not show a copper deficiency.…”

Deficiência de fósforo em caprinos no semiárido de Pernambuco

“…O Estado de Pernambuco detém um rebanho aproximado de 2,43 milhões de caprinos (Brasil 2015) e apesar da caprinocultura ser uma das atividades mais representativas para os produtores rurais, sobretudo nas regiões do agreste e do sertão do Estado, as criações são geralmente praticadas com manejo inadequado, principalmente no que se refere à alimentação e profilaxia de doenças (Sampaio et al 2009). Pouco se sabe sobre a incidência e prevalência das principais doenças que acometem caprinos, sobretudo aquelas relacionadas a distúrbios metabólicos e nutricionais (Silva Júnior et al 2015).…”