The effect of an active live yeast product on the digestibility of finishing diets for lambs

Pienaar, G.H.; Einkamerer, Ockert; Merwe, H.J. van der; Hugo, A.; Fair, M. D.

doi:10.1016/j.smallrumres.2014.11.001

Cited by 6 publications

(4 citation statements)

References 28 publications

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“…They have thus been regarded as rumen pH stabilisers (Chaucheyras-Durand et al, 2008;Desnoyers et al, 2009). In most in vivo evaluations of commercial products that contain Saccharomyces cerevisiae, researchers confirmed that the amounts of live cells were described by the commercial manufactures (Crosby et al, 2004;Pinloche et al, 2013;Ahmed et al, 2015;Pienaar et al, 2012).…”

Section: Introductionmentioning

confidence: 98%

Effects of types and doses of yeast on gas production and in vitro digestibility of diets containing maize (Zea mays) and lucerne (Medicago sativa) or oat hay

et al. 2016

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Two yeast products formulated with Saccharomyces cerevisiae were evaluated at the same colonyforming units (CFUs) per gram of substrate. Samples of maize, lucerne and oat hays were mixed (0.5 kg) to a proportion of 80% forage (lucerne or oat) with 20% maize (DM basis) and combined with each yeast to obtain 1.5 x 10 7 or 3.0 x 10 7 CFU/g DM. There was also a control without yeast. In vitro gas production was measured at 0, 2, 4, 6, 8, 10, 14, 18, 24, 30, 36, 42, 48, 60, and 72 h incubation. There was no forage/yeast interaction. Both yeast products tended to reduce the maximum volume produced quadratically and lag time linearly, while in vitro dry matter digestibility (IVDMD) increased linearly. Ruminal ammonia N and lactic acid were not affected, whereas methane and carbon dioxide tended to be reduced with the intermediate dose of yeast. When the mixture included oat hay, the total volume of gas increased, the lag time decreased, and there was higher IVDMD than in the lucerne-based mixtures, which were associated with lower methane production. Ammonia and lactic acid remained unchanged. The two yeast products showed the same effects on the dynamics of gas production and in vitro digestibility when dosed at the same number of viable cells or CFUs, and there was no interaction with forage quality.

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Section: Introductionmentioning

confidence: 98%

Effects of types and doses of yeast on gas production and in vitro digestibility of diets containing maize (Zea mays) and lucerne (Medicago sativa) or oat hay

et al. 2016

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“…Yeasts have gained interest in ruminant production systems mainly because of their effects on improving productive performance, digestibility, and ruminal microbiome balance (Pienaar et al, 2015;Ma et al, 2015;Hansen et al, 2017;He et al, 2017;Xu et al, 2017). In this regard, some studies have been conducted and focused on productive performance, blood metabolite balance, and microbiome responses in yeast supplemented animals (Hadjipanayiotou et al, 1997;Giger-Reverdin et al, 2004;El-Ghani, 2004;Stella et al, 2007;Pal et al, 2010;Zicarelli et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

IMMUNOBIOLOGICAL EFFECTS OF MARINE Debaryomyces Hansenii-DERIVED LYSATES ON GOAT PERIPHERAL BLOOD LEUKOCYTES

Córdova¹,

Becerril²,

Angulo³

et al. 2021

Trop Subtrop Agroecosyst

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Background. Successful immunomodulatory effects of yeast structural and secretory bioactive compounds have been demonstrated on several animal species. Likewise, studies have shown the ability of Debaryomyces hansenii to stimulate both immune and antioxidant responses on fish, crustaceans, mollusks, and recently, goats. Objective. To analyze the immunostimulant activity of lysates derived from five strains of the marine yeast D. hansenii in goat peripheral blood leukocytes using in vitro assays. Methodology. For this purpose, leukocytes from caprine peripheral blood were isolated and incubated (24 h) with lysate-derived D. hansenii strains and Zymosan (positive control). Results. The results revealed that these strains significantly increased cell immune parameters, such as phagocytic capacity, reactive oxygen species (respiratory burst) and nitric oxide production, and myeloperoxidase activity. Antioxidant enzyme assays in leukocytes stimulated with lysate-derived D. hansenii demonstrated significant increases in superoxide dismutase and catalase activities. Implications. This in vitro study using peripheral blood leukocytes suggest that lysates derived from marine yeast D. hansenii strains could be considered immunostimulants for goats through their ability to stimulate the non-specific immune parameters and the antioxidant immune mechanism, without affecting leukocyte viability. Conclusion. In particular, the results indicated that D. hansenii BCS001 was able to modulate the immune parameters in goat immune cells. Therefore, additional in vivo immunostimulatory assays deserve further research, including other species of economic interest in food production.

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“…Saccharomyces cerevisiae to the finishing diet of South African Mutton Merino lambs, showed no positive effect in nutrient digestibility and metabolisable energy as opposed to the control animals (Pienaar et al, 2015).…”

Section: Introductionmentioning

confidence: 77%

“…Several studies have shown S. cerevisiae to have no positive effect on feed intake, nutrient digestibility and weight gain compared to the control animals (Hristov et al, 2010;Pienaar et al, 2015;Soren et al, 2013). Under certain conditions, these "probiotic" organisms may even have a negative effect on ruminants.…”

Section: Probiotics In the Rumenmentioning

confidence: 99%

Microbial Community Structure and Functionality in Ruminants Fed the Probiotic Bacillus amyloliquefaciens H57

Schofield¹

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In the agricultural industry, farmers are continually searching for ways to improve animal production. Developing a more efficient digestive system is one such way that this can be achieved.In domesticated ruminants such as sheep and cattle, the feed material is initially digested in the largest and most prominent compartment of the alimentary canal: the rumen. The rumen is populated by a complex community of microorganisms that are capable of degrading the tough fibrous components of the plant cell wall, releasing fermentable and digestible carbohydrates, proteins, lipids and nucleic acids. Probiotics, defined as "live microorganisms that, when administered in adequate amounts, confer a health benefit on the host", have been used as a means to influence the rumen microbial community to improve the efficiency of feed digestion.In this study we cultivate the probiotic Bacillus amyloliquefaciens strain H57 as an inoculum, to be added to pelleted animal feed in concentrations of 10 9 cfu kg -1 (Chapter 2). To determine the genetic makeup of H57, its genome was sequenced (Chapter 3). The sequence analysis revealed a number of antimicrobial lipopeptides and polyketides, which if expressed in the rumen could significantly alter the rumen microbial community. Other genes of interest within the H57 genome include a number of carbohydrate degrading enzymes as well as those involved with nitrate reduction, which has been recognised as a potential alternative electron acceptor under anaerobic conditions such as the rumen.The H57 inoculum was administered in two animal feeding trials, one using pregnant Dorper ewes and the other using newborn dairy calves. In both instances a significant increase in weight gain was observed in the H57 fed animals compared to the control group. As a means to understand how H57 benefits these animals, the rumen microbial community was profiled by sequencing PCR amplicons of the 16S rRNA gene (Chapter 4). Analysis of the calf rumen microbiome did not reveal any significant differences between the control calves and those that were fed H57 for eight weeks. The only differences in the rumen community occurred between the initial sampling at four weeks and after weaning at eight weeks. In the sheep, however, there was a clear shift in microbial community structure between the control and H57 fed sheep. In both the control and H57 fed sheep the most abundant bacterial populations were Prevotella, although different species were dominant in each treatment group. The H57 fed sheep also had an abundance of Roseburia.Further analysis into the genetic potential and functionality of differentially abundant rumen microorganisms was performed on the sheep samples using metagenomic and metatranscriptomic sequencing. It was found that in the H57 fed sheep the rumen microbial community had an increased expression of hemicellulolytic enzymes, including β-glucosidase/β-galactosidase, α-galactosidase and L-arabinose isomerase. As hemicellulose contributes a significant portion of plant iii cell wall bio...

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The effect of an active live yeast product on the digestibility of finishing diets for lambs

Cited by 6 publications

References 28 publications

Effects of types and doses of yeast on gas production and <i>in vitro</i> digestibility of diets containing maize (<i>Zea mays</i>) and lucerne (<i>Medicago sativa</i>) or oat hay

Effects of types and doses of yeast on gas production and <i>in vitro</i> digestibility of diets containing maize (<i>Zea mays</i>) and lucerne (<i>Medicago sativa</i>) or oat hay

IMMUNOBIOLOGICAL EFFECTS OF MARINE Debaryomyces Hansenii-DERIVED LYSATES ON GOAT PERIPHERAL BLOOD LEUKOCYTES

Microbial Community Structure and Functionality in Ruminants Fed the Probiotic Bacillus amyloliquefaciens H57

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