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https://www.readbyqxmd.com/read/28526787/development-of-multi-well-plate-methods-using-pure-cultures-of-methanogens-to-identify-new-inhibitors-for-suppressing-ruminant-methane-emissions
#1
M R Weimar, J Cheung, D Dey, C McSweeney, M Morrison, Y Kobayashi, W B Whitman, V Carbone, L R Schofield, R S Ronimus, G M Cook
Hydrogenotrophic methanogens typically require strictly anaerobic culturing conditions in glass tubes with overpressures of H2 and CO2 that are both time-consuming and costly. To increase the throughput for screening chemical compound libraries, 96-well microtiter plate methods for the growth of a marine (environmental) methanogen Methanococcus maripaludis strain S2 and the rumen methanogen Methanobrevibacter species AbM4 were developed. A number of key parameters (inoculum size, reducing agents for media preparation, duration of assay, inhibitor solvents and culture volume) were optimised to achieve robust and reproducible growth in a high-throughput microtiter plate format...
May 19, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28525343/changes-of-hematological-and-biochemical-parameters-and-levels-of-pepsinogen-histamine-and-prostaglandins-in-dairy-cows-affected-with-left-displacement-of-the-abomasum
#2
O Al-Rawashdeh, Z Bani Ismail, A Talafha, A Al-Momani
The aims of this study were to determine the serum levels of pepsinogen, histamine, and prostaglandins F2α and E2 in lactating dairy cows affected with left displacement of the abomasum (LDA). In addition, the hematological and serum biochemical parameters were also determined in cows affected with LDA. A total of 52 adult lactating Holstein-Friesian cows affected with LDA and 30 normal cows (control) were used. In LDA cows, the average age, BCS and body weight were 4.9 ± 1.2 years, 2.5 ± 0.75, and 525 ± 150kg respectively...
March 28, 2017: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28524013/probiotic-supplementation-effects-on-milk-fatty-acid-profile-in-ewes
#3
Shahab Payandeh, Farokh Kafilzadeh, Manuela Juárez, Miguel Angel de la Fuente, Darab Ghadimi, Andrés L Martínez Marín
We hypothesised that probiotic feeding would alter the fatty acid (FA) profile of sheep's milk. Sixteen lactating ewes, kept under the same feeding and management practices, were randomly allocated to receive either a control diet or the same diet supplemented with a commercial multi-strain bacterial probiotic. Milk fat FA contents were monitored fortnightly for eight consecutive weeks from 14 d after lambing. Probiotic supplementation increased the contents of butyric and caproic acids in milk fat and had no negative effects on other relevant FA from the human's health point of view (i...
May 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28522863/effects-of-replacing-leymus-chinensis-with-whole-crop-wheat-hay-on-holstein-bull-apparent-digestibility-plasma-parameters-rumen-fermentation-and-microbiota
#4
Wenjing Niu, Yang He, Chuanqi Xia, Muhammad Aziz Ur Rahman, Qinghua Qiu, Taoqi Shao, Yixun Liang, Linbao Ji, Haibo Wang, Binghai Cao
Twelve Holstein bulls were used in a 4 × 4 Latin square design to investigate the effects of using whole-crop wheat hay (WCWH) as a substitute for Leymus chinensis (LC) on apparent digestibility, plasma parameters, ruminal fermentation, and microbial communities. Experimental treatments were four proportions of WCWH, 0, 33, 67, and 100%, as a substitute for LC (WCWH0, WCWH33, WCWH67, and WCWH100, respectively). The WCWH100 group showed a higher nutritional intake of crude protein (CP) and higher apparent digestibility of organic matter (OM), CP, and ether extract (EE) than the WCWH0 group (P < 0...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28512453/alterations-in-the-rumen-liquid-particle-and-epithelium-associated-microbiota-of-dairy-cows-during-the-transition-from-a-silage-and-concentrate-based-ration-to-pasture-in-spring
#5
Melanie Schären, Kerstin Kiri, Susanne Riede, Mark Gardener, Ulrich Meyer, Jürgen Hummel, Tim Urich, Gerhard Breves, Sven Dänicke
In spring dairy cows are often gradually transitioned from a silage- and concentrate-based ration (total mixed ration, TMR) to pasture. Rumen microbiota adaptability is a key feature of ruminant survival strategy. However, only little is known on the temporal and spatial microbial alterations involved. This study aims to investigate how the rumen liquid (LAAB), particle (PAAB), and epithelium (EAAB) associated archaea and bacteria are influenced by this nutritional change. A 10-wk trial was performed, including 10 rumen-fistulated dairy cows, equally divided into a pasture- and a confinement- group (PG and CG)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28507415/prospects-of-complete-feed-system-in-ruminant-feeding-a-review
#6
REVIEW
Yasir Afzal Beigh, Abdul Majeed Ganai, Haidar Ali Ahmad
Effective utilization of available feed resources is the key for economical livestock rearing. Complete feed system is one of the latest developments to exploit the potential of animal feed resources in the best possible way. The complete feed is a quantitative mixture of all dietary ingredients, blended thoroughly to prevent separation and selection, fed as a sole source of nutrients except water and is formulated in a desired proportion to meet the specific nutrient requirements. The concentrate and roughage levels may vary according to the nutrient requirement of ruminants for different production purposes...
April 2017: Veterinary World
https://www.readbyqxmd.com/read/28507336/divergent-functional-isoforms-drive-niche-specialisation-for-nutrient-acquisition-and-use-in-rumen-microbiome
#7
Francesco Rubino, Ciara Carberry, Sinéad M Waters, David Kenny, Matthew S McCabe, Christopher J Creevey
No abstract text is available yet for this article.
June 2017: ISME Journal
https://www.readbyqxmd.com/read/28501409/effect-of-different-fat-supplements-on-performance-of-dairy-calves-during-cold-season
#8
E Ghasemi, M Azad-Shahraki, M Khorvash
The objective of this experiment was to evaluate the effects of starter supplementation with fat sources differing in their fatty acid (FA) profile on performance of dairy calves during cold season. Sixty Holstein calves (3 d of age; 39.7 ± 3.8 kg of body weight) were randomly assigned to 1 of 5 starter diets supplemented with (1) no fat or oil source (control), (2) 3% palm fat (PLF), (3) 3% soybean oil (SBO), (4) 3% tallow (TAL), and (5) a 3.2% mixture (MIX) of PLF, SBO, and fish oil. The fat supplements were substituted for corn in the basal starter diet...
May 10, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28501407/amino-acid-composition-of-rumen-bacteria-and-protozoa-in-cattle
#9
M Sok, D R Ouellet, J L Firkins, D Pellerin, H Lapierre
Because microbial crude protein (MCP) constitutes more than 50% of the protein digested in cattle, its AA composition is needed to adequately estimate AA supply. Our objective was to update the AA contributions of the rumen microbial AA flowing to the duodenum using only studies from cattle, differentiating between fluid-associated bacteria (FAB), particle-associated bacteria (PAB), and protozoa, based on published literature (53, 16, and 18 treatment means were used for each type of microorganism, respectively)...
May 10, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28501402/thiamine-supplementation-facilitates-thiamine-transporter-expression-in-the-rumen-epithelium-and-attenuates-high-grain-induced-inflammation-in-low-yielding-dairy-cows
#10
X H Pan, L Yang, Y Beckers, F G Xue, Z W Tang, L S Jiang, B H Xiong
An experiment was conducted to uncover the effects of increasing dietary grain levels on expression of thiamine transporters in ruminal epithelium, and to assess the protective effects of thiamine against high-grain-induced inflammation in dairy cows. Six rumen-fistulated, lactating Holstein dairy cows (627 ± 16.9 kg of body weight, 180 ± 6 d in milk; mean ± standard deviation) were randomly assigned to a replicated 3 × 3 Latin square design trial. Three treatments were control (20% dietary starch, dry matter basis), high-grain diet (HG, 33...
May 10, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28501401/milk-production-and-composition-nitrogen-utilization-and-grazing-behavior-of-late-lactation-dairy-cows-as-affected-by-time-of-allocation-of-a-fresh-strip-of-pasture
#11
R E Vibart, M Tavendale, D Otter, B H Schwendel, K Lowe, P Gregorini, D Pacheco
Eighty late-lactation dairy cows were used to examine the effects of allocating a new pasture strip of a sward based on ryegrass (Lolium perenne L.) in the morning (a.m.; ∼0730 h) or in the afternoon (p.m.; ∼1530 h) on milk production and composition, nitrogen (N) utilization, and grazing behavior. Cows grazed the same pasture strips for 24 h and were offered the same daily herbage allowance. Herbage composition differed among treatments; p.m. herbage had greater dry matter (DM; 22.7 vs. 19.9%), organic matter (OM; 89...
May 10, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28497207/evaluation-of-rumen-protected-choline-additive-to-diet-on-productive-performance-of-male-zaraibi-growing-goats-during-hot-summer-season-in-egypt
#12
A A M Habeeb, A E Gad, M A A Atta, M A M Abdel-Hafez
Twenty Zaraibi goat bucks were used in this experiment which lasted 3 months during summer season of Egypt. The animals were divided randomly into two equal groups. The first group was kept without treatment as control while in the second group, rumen-protected choline (RPC) at the level of 20 g/buck/day was added to the concentrate feed mixture at the morning feeding. RPC additives to diet of Zaraibi goat bucks during the period of hot summer season increased (P < 0.01) total gain and average daily gain compared to the control group...
May 12, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28495244/rumen-prokaryotic-communities-of-ruminants-under-different-feeding-paradigms-on-the-qinghai-tibetan-plateau
#13
Dan Xue, Huai Chen, Xinquan Zhao, Shixiao Xu, Linyong Hu, Tianwei Xu, Lin Jiang, Wei Zhan
Yak and Tibetan sheep are the major indigenous ruminants on the Qinghai-Tibetan Plateau in China. The aim of this work was to study the differences in ruminal fermentation parameters and rumen prokaryotic community composition between hosts and feeding paradigms. The 16S rRNA genes targeting bacteria and archaea were sequenced using the MiSeq platform. The results showed that the prokaryotic community structure between yak and Tibetan sheep was significantly different (P<0.01). A significant difference in structure was also found between groups of yaks barn fed with a total mixed ration (TMR) and those naturally grazing (NG) (P=0...
April 18, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28494211/pecoramyces-ruminantium-gen-nov-sp-nov-an-anaerobic-gut-fungus-from-the-feces-of-cattle-and-sheep
#14
Radwa A Hanafy, Mostafa S Elshahed, Audra S Liggenstoffer, Gareth W Griffith, Noha H Youssef
The anaerobic gut fungi (AGF) inhabit the rumen and alimentary tracts of multiple ruminant and nonruminant herbivores, belong to a distinct phylum-level lineage (Neocallimastigomycota), and play an important role in plant biomass degradation in many herbivores. As part of a wider effort to obtain AGF with high lignocellulolytic capacities, we isolated and characterized four different AGF strains from the feces of cattle and sheep. Microscopically, isolates produced monocentric thalli and monoflagellated zoospores...
April 18, 2017: Mycologia
https://www.readbyqxmd.com/read/28492803/tropical-forages-morphoanatomy-of-plants-grown-in-areas-with-the-death-of-pasture-syndrome
#15
N G Ribeiro-Júnior, O S Fagundes, A S Benevenuti, O M Yamashita, A A B Rossi, M A C Carvalho, I V Silva
Roots and leaves of Panicum maximum Tanzânia, Mombaça and Massai; Urochloa brizantha Piatã, Marandu and Xaraés; Urochloa humidicola Llanero; Urochloa ruziziensis Ruzizienses; Urochloa hybrida Mulato II and Cynodon nlemfuensis Estrela-roxa were analyzed, seeking to identify characters for better adaptation to the environment that may interfere with digestibility of tissue from the point of view of the rumen in cattle. Were planted ten cultivars in a completely randomized blocks with three repetitions. Was collected vegetative material, which histological slides were prepared from middle third of the sections of roots and leaves...
May 4, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28488014/effect-of-nitrooxy-compounds-with-different-molecular-structures-on-the-rumen-methanogenesis-metabolic-profile-and-methanogenic-community
#16
Wei Jin, Zhenxiang Meng, Jing Wang, Yanfen Cheng, Weiyun Zhu
Rumen in vitro fermentation was used to evaluate the capacity of nitrooxy compounds to mitigate rumen methane production. The following three nitrooxy compounds, each with different molecular structures, were evaluated: 2,2-dimethyl-3-(nitrooxy) propanoic (DNP), N-[2-(Nitrooxy)ethyl]-3-pyridinecarboxamide (NPD), and nitroglycerin (NG). All three compounds substantially decreased the total gas production, methane production, and the acetate:propionate ratio, while increasing hydrogen production. The growth of methanogens was specifically inhibited by all three compounds, without affecting the abundance of bacteria, anaerobic fungi, or protozoa...
May 10, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28486619/comparing-the-responses-of-rumen-ciliate-protozoa-and-bacteria-to-excess-carbohydrate
#17
César R V Teixeira, Rogério de Paula Lana, Junyi Tao, Timothy J Hackmann
When given excess carbohydrate, certain microbial species respond by storing energy (synthesizing reserve carbohydrate), but other species respond by dissipating the energy as heat (spilling energy). To determine the importance of these responses in the rumen microbial community, this study quantified the responses of mixed ciliate protozoa vs. bacteria to glucose. We hypothesized that ciliates would direct more glucose to synthesis of reserve carbohydrate (and less to energy spilling) than would bacteria. Ciliates and bacteria were isolated from rumen fluid using filtration and centrifugation, resuspended in nitrogen-free buffer to limit growth, and dosed with 5 mM glucose...
May 9, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28478774/supplementing-high-quality-fresh-forage-to-growing-lambs-fed-a-total-mixed-ration-diet-led-to-higher-intake-without-altering-nutrient-utilization
#18
A Pérez-Ruchel, J L Repetto, C Cajarville
The effect of supplementing high-quality fresh forage, mainly based on alfalfa, to growing lambs fed with decreasing levels of total mixed ration (TMR) was studied on intake, digestion and ruminal environment. In total, 24 catheterized lambs (25.2±3.67 kg) housed in individual metabolism cages were assigned to one of four treatment diets: 'TMR100': TMR offered ad libitum; 'TMR75' and 'TMR50': TMR at a level of 0.75 and 0.50 of potential intake, respectively, complemented with fresh forage without restriction; 'TMR0': only fresh forage ad libitum...
May 8, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28475856/international-cooperation-to-enable-the-diagnosis-of-all-rare-genetic-diseases
#19
Kym M Boycott, Ana Rath, Jessica X Chong, Taila Hartley, Fowzan S Alkuraya, Gareth Baynam, Anthony J Brookes, Michael Brudno, Angel Carracedo, Johan T den Dunnen, Stephanie O M Dyke, Xavier Estivill, Jack Goldblatt, Catherine Gonthier, Stephen C Groft, Ivo Gut, Ada Hamosh, Philip Hieter, Sophie Höhn, Matthew E Hurles, Petra Kaufmann, Bartha M Knoppers, Jeffrey P Krischer, Milan Macek, Gert Matthijs, Annie Olry, Samantha Parker, Justin Paschall, Anthony A Philippakis, Heidi L Rehm, Peter N Robinson, Pak-Chung Sham, Rumen Stefanov, Domenica Taruscio, Divya Unni, Megan R Vanstone, Feng Zhang, Han Brunner, Michael J Bamshad, Hanns Lochmüller
Provision of a molecularly confirmed diagnosis in a timely manner for children and adults with rare genetic diseases shortens their "diagnostic odyssey," improves disease management, and fosters genetic counseling with respect to recurrence risks while assuring reproductive choices. In a general clinical genetics setting, the current diagnostic rate is approximately 50%, but for those who do not receive a molecular diagnosis after the initial genetics evaluation, that rate is much lower. Diagnostic success for these more challenging affected individuals depends to a large extent on progress in the discovery of genes associated with, and mechanisms underlying, rare diseases...
May 4, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/28473826/the-type-of-forage-substrate-preparation-included-as-substrate-in-a-rusitec-system-affects-the-ruminal-microbiota-and-fermentation-characteristics
#20
Andrea C Duarte, Devin B Holman, Trevor W Alexander, Zoey Durmic, Philip E Vercoe, Alexandre V Chaves
In vitro fermentation systems such as the rumen simulation technique (RUSITEC) are frequently used to assess dietary manipulations in livestock, thereby limiting the use of live animals. Despite being in use for nearly 40 years, improvements are continually sought in these systems to better reflect and mimic natural processes in ruminants. The aim of this study was to evaluate the effect of forage preparation, i.e., frozen minced (FM) and freeze-dried and ground (FDG), on the ruminal microbiota and on fermentation characteristics when included as a substrate in a RUSITEC system...
2017: Frontiers in Microbiology
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