Physicochemical characteristics, cellular and microbiological mammary secretion of Santa Inês ewes in lactating and post-weaning period

Abstract

Changes in the composition of milk secretion that ocorremdurante the early stages of involution indicate rapid structural changes in the gland and the mechanisms involved in milk synthesis and secretion. Thus, this study sought to elucidate the physicochemical characteristics and cell of milk from sheep of the Santa Inês during the initial period of mammary involution, evaluating the hydrogen ion concentration, somatic cell count (SCC) and the lactose , protein, fat and total solids, in addition to bacteriological examination. In the post-weaning period significant changes were observed in the composition of milk secretion, as increasing pH and protein content, reduced levels of lactose, total solids and fat, plus a trend in increasing CCS. In the positive bacteriological examination animals were also found changes similar to those that occur in the active involution, except fat. Both at the end of breastfeeding period as the period of active involution was exclusively isolated genus Staphylococcus. Changes in the composition of milk secretion that occur during the early stages of involution indicate rapid structural changes in the gland and the mechanisms involved in milk synthesis and secretion. Thus, this study sought to elucidate the physicochemical characteristics and cell of milk from sheep of the Santa Inês during the initial period of mammary involution, evaluating the hydrogen ion concentration, somatic cell count (SCC) and the lactose , protein, fat and total solids, in addition to bacteriological examination. In the post-weaning period significant changes were observed in the composition of milk secretion, as increasing pH and protein content, reduced levels of lactose, total solids and fat, plus a trend in increasing CCS. In the positive bacteriological examination animals were also found changes similar to those that occur in the active involution, except fat. Both at the end of breastfeeding period as the period of active involution was exclusively isolated genus Staphylococcus.