Bacterial species in the ruminal content of steers fed oilseeds in the diet

Melo, Hilda Silva Araujo de; Ítavo, L. C. V.; Castro, Alinne Pereira de; Ítavo, Camila Celeste Brandão Ferreira; Caldas, Ruy de Araujo; Mateus, Rodrigo Gonçalves; Niwa, Marcus Vinicius Garcia; Moraes, Gabriella Jorgetti de; Zornitta, Camila da Silva; Gurgel, A. L. C.; Benchaar, C.

doi:10.1007/s11250-022-03399-x

Cited by 5 publications

(5 citation statements)

References 58 publications

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“…Similar to our study, others have found no differences in average daily gain in calves fed probiotics compared to controls and other treatments [16][17][18]. Of note are studies comparing production traits between animals on a control diet or a diet containing Monenesin or probiotics [19,20]. The animals on the probiotic diet gained as much as those on the diet containing Monensin.…”

Section: Discussionsupporting

confidence: 88%

The Effect of Probiotics in a Milk Replacer on Leukocyte Differential Counts, Phenotype, and Function in Neonatal Dairy Calves

Eicher,

Kritchevsky,

Bryan

et al. 2023

Microorganisms

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Probiotics have been investigated for many health benefits; however, few studies have been performed to determine the effects of oral probiotics on peripheral blood and respiratory immune cells in cattle. Our objectives were to determine changes in health and growth status, differential blood cell counts and function, and blood and lung cell function using flow cytometry and PCR in dairy calves fed a milk replacer with (PRO, N = 10) or without (CON, N = 10) the addition of probiotics to the milk replacer and dry rations from birth to weaning. Performance and clinical scores were not different between the treatment groups. Treatment-by-day interactions for peripheral blood leukocyte populations differed in cell number and percentages. A greater percentage of leukocytes expressed the cell surface markers CD3, CD4, CD8, CD11b, and CD205 on d 21 in CON animals. Lung lavages were performed on five animals from each treatment group on d 52. There were no differences between treatment groups for the expression of cytokines and Toll-Like Receptors as measured using Polymerase Chain Reaction, possibly due to the small sample size. Oral probiotics appear to affect peripheral blood immune cells and function. Their effect on overall calf health remains to be determined.

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Section: Discussionsupporting

confidence: 88%

The Effect of Probiotics in a Milk Replacer on Leukocyte Differential Counts, Phenotype, and Function in Neonatal Dairy Calves

Eicher,

Kritchevsky,

Bryan

et al. 2023

Microorganisms

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“…Table 3 presents M. elsdenii abundance in the rumen of animals determined through these culture-independent methods [ 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. Relative abundance (RA) in the rumen is typically well under 1% of the total bacteria, except in animals experiencing metabolic or production problems, particularly milk fat depression.…”

Section: Abundance In the Rumenmentioning

confidence: 99%

Megasphaera elsdenii: Its Role in Ruminant Nutrition and Its Potential Industrial Application for Organic Acid Biosynthesis

Cabral,

Weimer

2024

Microorganisms

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The Gram-negative, strictly anaerobic bacterium Megasphaera elsdenii was first isolated from the rumen in 1953 and is common in the mammalian gastrointestinal tract. Its ability to use either lactate or glucose as its major energy sources for growth has been well documented, although it can also ferment amino acids into ammonia and branched-chain fatty acids, which are growth factors for other bacteria. The ruminal abundance of M. elsdenii usually increases in animals fed grain-based diets due to its ability to use lactate (the product of rapid ruminal sugar fermentation), especially at a low ruminal pH (<5.5). M. elsdenii has been proposed as a potential dietary probiotic to prevent ruminal acidosis in feedlot cattle and high-producing dairy cows. However, this bacterium has also been associated with milk fat depression (MFD) in dairy cows, although proving a causative role has remained elusive. This review summarizes the unique physiology of this intriguing bacterium and its functional role in the ruminal community as well as its role in the health and productivity of the host animal. In addition to its effects in the rumen, the ability of M. elsdenii to produce C2–C7 carboxylic acids—potential precursors for industrial fuel and chemical production—is examined.

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“…Lipids can alter ruminal fermentation, and structural carbohydrate degradation (Jenkins and Palmquist, 1984). Another lipid effect is the alteration of the microbiota ruminal into almost 50% of the diversity of fermentative bacteria (Melo et al, 2022;Melo et al, 2023). Bassi et al (2012) evaluated 60 g/kg of EE including soybean, cottonseed, and flaxseed as sources of lipids diet, and also observed higher DMI in animals that consumed a diet without oilseeds.…”

Section: Discussionmentioning

confidence: 99%

Productive and economic performance of feedlot young Nellore bulls fed whole oilseeds

Valeriano,

Ítavo,

Ítavo

et al. 2023

Revista Brasileira De Zootecnia

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The effects of diets containing oilseeds were measured to evaluate the productive and economic parameters in the finishing of young, feedlot Nellore bulls. Twenty-four young Nellore bulls were used, with an initial body weight (BW) of 311.46±0.37 kg and 24 months of age, distributed into individual stalls (4 × 20 m) in a completely randomized design, totaling four treatments with six repetitions per treatment. Four diets (control, based on corn and soybean meal, and three diets containing cottonseed, soybean, and sunflower) were evaluated. Feed and orts were measured daily to calculate intake and costs. The dry matter intake of the control group was higher than soybean (10.64 kg/day), cotton (9.88 kg/day), and sunflower (9.30 kg/day) treatments, respectively. The cottonseed treatment showed the highest average neutral detergent fiber intake. There was a dietary effect of diets on average daily gain, total weight gain, and final weight. The soybean treatment showed the highest performance, total gain (232.55 kg), and final weight (544.38 kg). Oilseed intake can modify the fatty acids profile in the meat, decreasing its saturated fatty acid content. Whole soybean seed favors performance, improves feed efficiency, fatty acid profile, and fat distribution in the carcass, and can reduce production costs.

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Bacterial species in the ruminal content of steers fed oilseeds in the diet

Cited by 5 publications

References 58 publications

The Effect of Probiotics in a Milk Replacer on Leukocyte Differential Counts, Phenotype, and Function in Neonatal Dairy Calves

The Effect of Probiotics in a Milk Replacer on Leukocyte Differential Counts, Phenotype, and Function in Neonatal Dairy Calves

Megasphaera elsdenii: Its Role in Ruminant Nutrition and Its Potential Industrial Application for Organic Acid Biosynthesis

Productive and economic performance of feedlot young Nellore bulls fed whole oilseeds

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