Resumo

NASEEM, C. et al. Effects of indigenous Saccharomyces cerevisiae on intake, growth, gut histology, and serum biomarkers in pre-weaned Lohi lambs. S. Afr. j. anim. sci. [online]. 2023, vol.53, n.4, pp.607-614. ISSN 2221-4062.  http://dx.doi.org/10.4314/sajas.v53i4.15.

The purpose of this study was to determine the comparative efficacy of locally-produced yeast to commercial yeast on growth performance, serum biomarkers, and gut histology. Thirty pre-weaned male Lohi lambs were divided into; 1) C (Control; starter diet with no supplement), 2) CY (starter diet with ewe milk supplemented with 1 g/animal/day commercial yeast), and 3) LY (starter diet supplemented with 1 g/animal/day local yeast). Animals were housed individually and fed a starter diet and orts were weighed daily. Dry matter intake (DMI) was determined daily while the body weights were determined on a weekly basis. At the end of the trial, blood samples were collected and analysed for blood urea nitrogen (BUN), glucose, β-Hydroxybutyrate (BHBA), and non-esterified fatty acids (NEFA), while ruminal fluid and tissues were collected for rumen fermentation parameters and histomorphometry. The results revealed that the DMI and average daily weight gain (ADWG) were higher in CY and LY compared to C. The feed efficiency was also better in CY and LY lambs compared to C lambs. The BHBA, BUN, total proteins (TP), cholesterol, creatinine, blood glucose, and tissue histomorphometry were similar in LY and CY supplementation. In conclusion, supplementation with LY produced comparable results to the CY.

Palavras-chave : Commercial yeast; jejunum; local yeast; rumen; sheep.

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