Effect of Saccharomyces cerevisiae fermentation products on performance, diarrhea outbreaks, and plasma glucose and NEFA concentration in bottle-fed calves

A. E. RELLING,; PISONI, L; WHINNERY, K

Congreso; 2018 American dairy science association annual meeting; 2018

The use of microbial additives in rations has become a common practicein ruminant?s nutrition. The main purpose on their use is to increasecattle performance and production from early stages. One of theseadditives are yeast cultures like Saccharomyces cerevisiae fermentationproducts (SCFP). The objectives of this study were to evaluate theeffect of SCFP on BW, DMI, diarrhea outbreaks, and plasma glucoseand NEFA concentration in bottle fed calves. Eighty newborn calves(n = 40 per treatment) were involved in this experiment. They wererandomly assigned to a control (C) treatment or SCFP supplementedtreatment (SC). Calves received a total of 6 L of colostrum at birth and3 L of milk twice daily. They were offered ad-libitum access to a solidconcentrate since d 3. Calves on SC also received 1 g of SmartCare dailyon the colostrum or milk in the morning feeding, and 0.7% of NutriTekon the solid feed. Body weight was recorded at birth and on d 14, 30,45, and 60. Dry matter offered was measured daily and refusals twicea week to obtain an average DMI. Blood was sampled on d 7 and 14 toevaluate plasma glucose and NEFA concentration. Fecal scores wererecorded daily. On d 30, fecal samples were collected for measurementsof Salmonella and E. coli concentration on feces. Data were analyzedas a randomized complete block design with repeated measurements(SAS 9.4). The model included the random effect of birth day (block),and the fixed effect of treatment, time and the interaction of treatmentby time. There was no effect (P > 0.2) on BW, DMI, diarrhea outbreaks,nor plasma glucose concentration. Bacteria count showed absence ofSalmonella and E. coli on feces. There was a time by treatment tendency(P < 0.11) on plasma NEFA concentration in which C had a plasmaNEFA concentration of 269.4 and 209.2 µM for d 7 and 14 and SC hada 242.5 and 241.2 µM for d 7 and 14, respectively. The results showedthat, under the current conditions, SCFP do not improve performance.The changes on plasma NEFA concentrations cannot be explained basedon the performance results