Changes in the relative population size of selected ruminal bacteria following an induced episode of acidosis in beef heifers receiving viable and non-viable active dried yeast

Mohammed, Riazuddin; Vyas, D.; Yang, Wenzhu; Beauchemin, K. A.

doi:10.1111/jam.13451

Cited by 10 publications

(18 citation statements)

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“…It has been suggested that feeding LY to receiving cattle can minimize the negative effects of adaptation on feed intake by altering ruminal fermentation patterns and improving cattle health (Adams et al, 1981;Finck et al, 2014). Mohammed et al (2017) also reported that ADY supplementation reduced subacute rumen acidosis in beef heifers by reducing the duration of pH < 5.8 (indicative of subacute ruminal acidosis) when compared with control heifers when the cattle were exposed to an acidosis challenge. The overall ADG and feed efficiency were not affected by LY supplementation in the present study.…”

Section: Effect Of Yeast Supplementation On Growth Performance and Camentioning

confidence: 93%

Using ruminally protected and nonprotected active dried yeast as alternatives to antibiotics in finishing beef steers: growth performance, carcass traits, blood metabolites, and fecal Escherichia coli1

Tao

Shen

Saleem

et al. 2018

Journal of Animal Science

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The objective of this study was to evaluate the effects of supplementing the diet of finishing beef steers with active dried yeast (ADY) in ruminally protected and nonprotected forms on growth performance, carcass traits, and immune response. Seventyfive individually-fed Angus steers (initial body weight (BW) ± SD, 448 ± 8.4 kg) were assigned to a randomized complete design with 5 treatments: 1) control (no monensin, tylosin, or ADY), 2) antibiotics (ANT, 330 mg monensin + 110 mg tylosin•steer −1 d −1), 3) ADY (1.5 g•steer −1 d −1), 4) encapsulated ADY (EDY; 3 g•steer −1 d −1), and 5) a mixture of ADY and EDY (MDY; 1.5 g ADY + 3 g EDY•steer −1 d −1). Active dried yeast with 1.7 × 10 10 cfu/g was encapsulated in equal amounts of ADY and capsule materials (stearic acid and palm oil). Steers were fed a total mixed ration containing 10% barley silage and 90% barley-based concentrate mix (dry matter [DM] basis). The ANT, ADY, and EDY were top-dressed daily to the diet at feeding. Intake of DM, final BW, averaged daily gain (ADG), and gain-to-feed ratio (G:F) were unaffected by ADY or EDY. Carcass traits including hot carcass weight (HCW), dressing percentage, marbling score and quality grade did not differ among treatments, although fewer severely abscessed livers were observed (P < 0.05) with ADY and MDY compared

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Section: Effect Of Yeast Supplementation On Growth Performance and Camentioning

confidence: 93%

Using ruminally protected and nonprotected active dried yeast as alternatives to antibiotics in finishing beef steers: growth performance, carcass traits, blood metabolites, and fecal Escherichia coli1

Tao

Shen

Saleem

et al. 2018

Journal of Animal Science

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“…Limiting lactic acid production/accumulation would help to reduce or prevent the extent of acidosis in the rumen. A positive effect on lactic acid concentration as well as rumen pH was also observed under in vivo conditions (Mohammed et al ). Pinloche et al () observed a decrease in the concentration of d ‐ and l ‐lactate by 58% when diet of cattle was supplemented with 5 g day −1 of yeast.…”

Section: Impact Of Feeding Single‐cell Fungi On Rumen Fermentation Acmentioning

confidence: 78%

Dynamic role of single‐celled fungi in ruminal microbial ecology and activities

Elghandour

Khusro²,

Adegbeye

et al. 2019

J Appl Microbiol

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Summary In ruminants, high fermentation capacity is necessary to develop more efficient ruminant production systems. Greater level of production depends on the ability of the microbial ecosystem to convert organic matter into precursors of milk and meat. This has led to increased interest by animal nutritionists, biochemists and microbiologists in evaluating different strategies to manipulate the rumen biota to improve animal performance, production efficiency and animal health. One of such strategies is the use of natural feed additives such as single‐celled fungi yeast. The main objectives of using yeasts as natural additives in ruminant diets include; (i) to prevent rumen microflora disorders, (ii) to improve and sustain higher production of milk and meat, (iii) to reduce rumen acidosis and bloat which adversely affect animal health and performance, (iv) to decrease the risk of ruminant‐associated human pathogens and (v) to reduce the excretion of nitrogenous‐based compounds, carbon dioxide and methane. Yeast, a natural feed additive, has the potential to enhance feed degradation by increasing the concentration of volatile fatty acids during fermentation processes. In addition, microbial growth in the rumen is enhanced in the presence of yeast leading to the delivery of a greater amount of microbial protein to the duodenum and high nitrogen retention. Single‐celled fungi yeast has demonstrated its ability to increase fibre digestibility and lower faecal output of organic matter due to improved digestion of organic matter, which subsequently improves animal productivity. Yeast also has the ability to alter the fermentation process in the rumen in a way that reduces methane formation. Furthermore, yeast inclusion in ruminant diets has been reported to decrease toxins absorption such as mycotoxins and promote epithelial cell integrity. This review article provides information on the impact of single‐celled fungi yeast as a feed supplement on ruminal microbiota and its function to improve the health and productive longevity of ruminants.

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“…The decrease observed in pH values was due to accumulation of acids that occurs in a closed fermentation system, similar to that observed by Santos et al (). Despite the pH reduction, the pH value remained within the range indicated for the appropriate development of fibrolytic bacteria in the rumen (Mohammed et al ). An optimal NDF‐D is important for ruminants.…”

Section: Discussionmentioning

confidence: 99%

“…The use benefit of yeasts as probiotics can be obtained by different forms of action. The alive and active yeasts in the rumen can compete with Streptococcus bovis by limiting lactate production (Mohammed et al ) or using excess lactate (Sirisan et al ) to reduce ruminal acidosis. The regulation of rumen pH can stimulate the activity of Selenomonas ruminantum and Megasphaera elsdenii , which consume lactic acid (Mohammed et al ) or use excess lactate (Sirisan et al ).…”

Section: Introductionmentioning

confidence: 99%

“…The alive and active yeasts in the rumen can compete with Streptococcus bovis by limiting lactate production (Mohammed et al ) or using excess lactate (Sirisan et al ) to reduce ruminal acidosis. The regulation of rumen pH can stimulate the activity of Selenomonas ruminantum and Megasphaera elsdenii , which consume lactic acid (Mohammed et al ) or use excess lactate (Sirisan et al ). The viable yeasts contribute to the control of thermal stress by inducing synthesis of niacin (Salvati et al, ), and the contact of the cell wall with the intestinal lumen triggers an immune response (Dhama et al ).…”

Section: Introductionmentioning

confidence: 99%

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Identification and characterization of yeasts from bovine rumen for potential use as probiotics

et al. 2019

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Aims:The aim was to isolate, identify and characterize yeasts present in rumen fluid and to select strains showing potential as probiotics. Methods and Results: Rumen fluid was sampled from 4 herds of dairy and beef cattle and 77 yeast isolates were identified. Initial screening was based on the capacity to maintain viability in a medium with different ruminal conditions. A second screening in fresh rumen fluid to assess the growth of inoculated yeasts and evaluate in vitro neutral detergent fibre digestibility (NDF-D), pH and acid accumulation was conducted. The yeast population ranged from 3Á84 to 6Á76 log 10 CFU per ml. The main species of yeast found were Pichia kudriavzevii, Candida rugosa, C. pararugosa, C. ethanolica and Magnusiomyces capitatus. Strains CCMA 933 (C. rugosa) and CCMA 970 (C. pararugosa) showed greater ability to survive in ruminal fluid and stimulated the production of acids. Isolate CCMA 967 (C. ethanolica) survived and improved the NDF-D. Conclusion: Pichia kudriavzevii was the dominant yeast found in the cattle herds. Strains CCMA 933, CCMA 970 and CCMA 967 showed properties that could be useful as potential probiotics for cattle. Significance and Impact of the Study: This study was the first to select yeasts from the rumen fluid, with the potential to be used as probiotic, based on the ruminal conditions. the contact of the cell wall with the intestinal lumen triggers an immune response (Dhama et al. 2015).Yeasts also appear to stimulate the growth and activity of fibrolytic ruminal bacteria by providing vitamins and growth factors (Moya et al. 2017). However, contradictory results are reported regarding interactions of diets, animals and environment (Chung et al. 2011). There are reports in the literature that the presence of some species Journal of Applied Microbiology 127, 845--855

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Changes in the relative population size of selected ruminal bacteria following an induced episode of acidosis in beef heifers receiving viable and non-viable active dried yeast

Abstract: The study provided valuable insight into the mechanism by which acidosis affects cattle performance. Individual animal variation in ruminal fermentation partly explained the variability in response to yeast supplementation in the study.

Cited by 10 publications

References 50 publications

Using ruminally protected and nonprotected active dried yeast as alternatives to antibiotics in finishing beef steers: growth performance, carcass traits, blood metabolites, and fecal Escherichia coli1

Using ruminally protected and nonprotected active dried yeast as alternatives to antibiotics in finishing beef steers: growth performance, carcass traits, blood metabolites, and fecal Escherichia coli1

Dynamic role of single‐celled fungi in ruminal microbial ecology and activities

Identification and characterization of yeasts from bovine rumen for potential use as probiotics

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