Effect of Direct-Fed Microbials on Rumen Microbial Fermentation

Martin, Scott A.; Nisbet, David J.

doi:10.3168/jds.s0022-0302(92)77932-6

Cited by 167 publications

(113 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Directly fed microbial products containing Saccharomyces cerevisiae are known to increase ruminal pH by reducing the lactic acid concentration in rumen fluid. Martin and Nisbet (1992) suggested that YC enhanced the utilization of lactate by an increased presence of lactate-utilizing bacteria, thereby maintaining a constant pH. Lynch and Martin (2002) reported that live yeast culture reduced, while yeast culture increased, the lactate concentration, which was also found in the current study with the high-NDF diet.…”

Section: Resultssupporting

confidence: 80%

“…Several hypotheses concerning the mode of action of yeast supplementation in ruminant nutrition have been proposed, but most of them emphasize positive effects achieved by modifying rumen fermentation. Yeast cultures can stimulate utilization of hydrogen by acetogenic bacteria, lactate uptake by Selenomonas ruminatium, and enhance the growth of cellulolytic bacteria (Martin and Nisbet, 1992;Chaucheyras et al, 1995). Live yeast cultures increased the proportion of propionate, decreased the lactate concentration, and increased the numbers of total viable bacteria and cellulolytic bacteria (Newbold et al, 1990;Mutsvangwa et al, 1992;Lila et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effect of <i>Saccharomyces cerevisiae</i> on ruminal fermentation in sheep fed high- or low-NDF rations

Grochowska¹,

Nowak²,

Mikuła³

et al. 2012

J. Anim. Feed Sci.

View full text Add to dashboard Cite

The aim of the study was to determine the effect of live yeast culture (LYC) and dehydrated yeast culture (YC) containing Saccharomyces cerevisiae on fermentation parameters and degradability in the rumen of sheep fed a high-(H-NDF; 56% DM) or low-(L-NDF; 35% DM) NDF diet. Three Polish Merino sheep fitted with ruminal cannulas were used. The effective degradability of maize grain and wheat straw was measured by an in situ procedure. Ruminal pH, ammonia, total volatile fatty acid concentrations, and molar percentages of acetate, propionate and butyrate were not modified by the addition of LYC or YC, irrespective of the applied diet. Compared with control (CON) and LYC supplementation of the L-NDF diet significantly (P<0.05) increased the caproate concentration, but in the H-NDF diet, it increased the lactate concentration (P<0.05). In situ rumen NDF degradability of maize grain and wheat straw was not affected by the treatments. When the sheep were fed the H-NDF diet, however, degradability of dry matter maize grain was significantly higher (P<0.05) than in the CON group. The results of this study did not confirm the hypothesis that NDF in the diet is the main reason for the considerable inconsistencies in the results of experiments with Saccharomyces cerevisiae products.

show abstract

Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

The effect of <i>Saccharomyces cerevisiae</i> on ruminal fermentation in sheep fed high- or low-NDF rations

Grochowska¹,

Nowak²,

Mikuła³

et al. 2012

J. Anim. Feed Sci.

View full text Add to dashboard Cite

show abstract

“…A reference search verification was performed by searching the reference lists from seven literature reviews addressing the S. cerevisiae supplementation in the diet of cattle (Martin & Nisbest, 1992;Newbold, 1996;Nicodemo, 2001;Denev et al, 2007;Chaucheyras, Walker, & Bach, 2008;França & Rigo, 2011;Calsamiglia, Blanch, Ferret, & Moya, 2012). We also manually searched the electronic search results to identify relevant studies missed in the primary search.…”

Section: Search Strategy and Study Selectionmentioning

confidence: 99%

The Effect of Live Yeast Supplementation on Beef Cattle Performance: A Systematic Review and Meta-Analysis

Sartori¹,

Canozzi²,

Zago³

et al. 2017

JAS

View full text Add to dashboard Cite

This meta-analysis evaluates the effects of yeast supplementation (Saccharomyces cerevisiae) on dry matter intake (DMI) and average daily gain (ADG) in beef cattle. The inclusion criteria were complete and randomized trials and supplementation with yeast S. cerevisiae versus no supplementation to measure DMI or ADG. Data were extracted from relevant papers via pre-defined protocols. A meta-analysis of random effects was conducted for each indicator separately including the mean of the control and treated groups. The results were presented with the pooled mean difference (MD), 95% of confidence interval, and I² (percentage of total variation between studies that is due to heterogeneity rather than chance). A total of 12 publications reporting 22 trials conducted in 1,161 cattle were analysed. The heterogeneity between studies was high and ranged from 92 to 99%. No effects were observed in ADG with the inclusion of yeast in the diet (MD = -2.849 g/day, p = 0.492). However, there was a reduction in the DMI (MD = -0.885 kg/day; p = 0.023) despite the high heterogeneity among studies (I 2 = 92.4%; p < 0.001). The ADG increased when the forage level in the diet was between 30 and 50% (MD = 641.08 g/day; p = 0.001) and decreased when the level range from 51 to 75% (MD = -2.90 g/day; p < 0.001). In over 60% of the Neutral Detergent Fibre, the use of yeast in the diet decreased the ADG by 406.94 g/day (p = 0.034). Feedlot animals showed a reduction in the DMI (MD = -0.97 kg/day; p = 0.019) if supplemented with yeast. Supplementation with S. cerevisiae in the diet of beef cattle had no effect on ADG; however, it does improve the feed conversion due to the reduction in DMI.

show abstract

“…During the last decades, microbial additives (probiotics) such as yeasts (Saccharomyces cerevisiae), or fungi (Aspergilus oryzae) have been widely used in ruminant nutrition to improve growth, lactation, and health because of their effects on dry matter (DM) intake, rumen pH, and nutrient digestibility [1]. However, few studies have evaluated the effects of feeding yeast products to the diet of young calves.…”

Section: Introductionmentioning

confidence: 99%

Effect of feeding live yeast products to calves with failure of passive transfer on performance and patterns of antibiotic resistance in fecalEscherichia coli

et al. 2005

View full text Add to dashboard Cite

-Fifty-two newborn Holstein calves with serum IgG concentrations less than 0.73 g·dL -1 were randomly assigned to one of four treatments: no added live yeast (control), 0.5 g of live yeast added to the grain for 84 d (SC; Saccharomyces cerevisiae), 0.5 g of live yeast added to the milk for 42 d (SB; S. cerevisiae, spp. boulardii), and 0.5 g of live yeast added to the grain for 84 d and to the milk for 42 d (SCSB). Calves were offered 440 g of milk replacer DM for the first 42 d and grain for ad libitum intake throughout the study. Plasma was analyzed weekly for concentrations of glucose and β-hydroxybutyrate. Escherichia coli isolated from fecal samples collected every 2 weeks were used for determination of antibiotic resistance patterns. Calves receiving SC consumed more grain DM, had increased weight gain prior to weaning, and increased plasma glucose concentrations compared to controls. Days with diarrhea were reduced by feeding live yeast to calves. Antibiotic resistance in fecal E. coli was associated with the age of calves with highest levels of resistance observed in the 3 d calves. While calves receiving SCSB had higher levels of antibiotic resistance than controls, this effect was not associated with any of the other treatments. Improvements in performance of calves with failure of passive transfer were observed when live yeast was added only to the grain. Saccharomyces cerevisia / yeast / failure of passive transfer

show abstract

Effect of Direct-Fed Microbials on Rumen Microbial Fermentation

Cited by 167 publications

References 38 publications

The effect of <i>Saccharomyces cerevisiae</i> on ruminal fermentation in sheep fed high- or low-NDF rations

The effect of <i>Saccharomyces cerevisiae</i> on ruminal fermentation in sheep fed high- or low-NDF rations

The Effect of Live Yeast Supplementation on Beef Cattle Performance: A Systematic Review and Meta-Analysis

Effect of feeding live yeast products to calves with failure of passive transfer on performance and patterns of antibiotic resistance in fecalEscherichia coli

Contact Info

Product

Resources

About