A5042633786- Ruminant Nutrition and Digestive Physiology
- Genetic and phenotypic traits in livestock
- Escherichia coli research studies
- Animal Nutrition and Physiology
- Microbial infections and disease research
- Reproductive Physiology in Livestock
- Agriculture Sustainability and Environmental Impact
- Bacteriophages and microbial interactions
- Viral gastroenteritis research and epidemiology
- Plant and fungal interactions
- Turfgrass Adaptation and Management
- Pharmaceutical and Antibiotic Environmental Impacts
- Meat and Animal Product Quality
- Gut microbiota and health
- Salmonella and Campylobacter epidemiology
- Phytase and its Applications
- Biofuel production and bioconversion
- Probiotics and Fermented Foods
- Antibiotic Resistance in Bacteria
- Effects of Environmental Stressors on Livestock
- Fatty Acid Research and Health
- Genomics and Phylogenetic Studies
- Aquaculture disease management and microbiota
- Microbial Metabolites in Food Biotechnology
- Muscle metabolism and nutrition
Agriculture and Agri-Food Canada
2016-2025
Lethbridge Research and Development Centre
2016-2025
Lethbridge College
2007-2025
University of Manitoba
2017-2025
University of Calgary
1995-2023
University of Lethbridge
1995-2023
University of Saskatchewan
2009-2023
Government of Canada
2023
Canadian Food Inspection Agency
2019
Queen's University
2019
Abstract Ruminant livestock are important sources of human food and global greenhouse gas emissions. Feed degradation methane formation by ruminants rely on metabolic interactions between rumen microbes affect ruminant productivity. Rumen camelid foregut microbial community composition was determined in 742 samples from 32 animal species 35 countries, to estimate if this influenced diet, host species, or geography. Similar bacteria archaea dominated nearly all samples, while protozoal...
Rumen microbiome biology gets a boost with the release of 410 high-quality reference genomes from Hungate1000 project. Productivity ruminant livestock depends on rumen microbiota, which ferment indigestible plant polysaccharides into nutrients used for growth. Understanding functions carried out by microbiota is important reducing greenhouse gas production ruminants and developing biofuels lignocellulose. We present cultured bacteria archaea, together their genomes, representing every...
Methane production in ruminants has received global attention relation to its contribution the greenhouse gas effect and warming. In last two decades, research programs Europe, Oceania North America have explored a variety of approaches redirecting reducing equivalents towards other reductive substrates as means decreasing methane ruminants. Some such vaccination, biocontrols (bacteriophage, bacteriocins) chemical inhibitors directly target methanogens. Other approaches, defaunation, diet...
Our objective was to determine if condensed tannin extract from quebracho trees (Schinopsis quebracho-colorado; red quebracho) could be used reduce enteric methane emissions cattle. The experiment designed as a repeated 3 x Latin square (4 squares) with treatments (0, 1, and 2% of dietary DM extract) 28-d periods. Six spayed Angus heifers (238 +/- 13.3 kg initial BW) 6 steers (207 8.2 were each assigned 2 squares. measured content the 91%, basal diet contained 70% forage (DM basis). Feeding...
Hristov, A. N., Hanigan, M., Cole, A., Todd, R., McAllister T. Ndegwa, P. and Rotz, 2011. Review: Ammonia emissions from dairy farms beef feedlots. Can. J. Anim. Sci. 91: 1–35. emitted animal feeding operations is an environmental human health hazard, contributing to eutrophication of surface waters nitrate contamination ground waters, soil acidity, fine particulate matter formation. It may also contribute global warming through nitrous oxide Along with these societal concerns, ammonia...
This study investigated the effect of diet and host on rumen bacterial microbiome impact an acidotic challenge its composition. Using parallel pyrosequencing V3 hypervariable region 16S rRNA gene, solid liquid associated communities 8 heifers were profiled. Heifers exclusively fed forage, before being transitioned to a concentrate diet, subjected allowed recover. Samples digesta collected when mixed high grain, during (4 h 12 h) recovery. A total 560,994 high-quality sequences obtained from...
Abstract For a One-Health investigation of antimicrobial resistance (AMR) in Enterococcus spp., isolates from humans and beef cattle along with abattoirs, manured fields, natural streams, wastewater both urban feedlot sources were collected over two years. Species identification revealed distinct associations across the continuum. Of 8430 collected, faecium faecalis main species (90%) clinical human (99%); hirae predominated (92%) catch-basins (60%), whereas streams harbored environmental...
Developments in high-throughput next generation sequencing (NGS) technology have rapidly advanced the understanding of overall microbial ecology as well occurrence and diversity specific genes within diverse environments. In present study, we compared ability varying depths to generate meaningful information about taxonomic structure prevalence antimicrobial resistance (ARGs) bovine fecal community. Metagenomic was conducted on eight composite samples originating from four beef cattle...
Ruminant livestock are an important source of anthropogenic methane (CH4). Decreasing the emissions enteric CH4 from ruminant production is strategic to limit global temperature increase 1.5°C by 2050. Research in area mitigation has grown exponentially last 2 decades, with various strategies for abatement being investigated: intensification, dietary manipulation (including supplementation and processing concentrates lipids, management forage pastures), rumen (supplementation ionophores,...
Sainfoin leaf condensed tannins inhibited growth and protease activity in Butyrivibrio fibrisolvens A38 Streptococcus bovis 45S1 but had little effect on Prevotella ruminicola B 1 4 or Ruminobacter amylophilus WP225. Tannins bound to cell coat polymers all strains. Morphological changes B. S. implicated the wall as a target of tannin toxicity.
Methane gas is produced in the rumen by methanogenic bacteria as a metabolic end product. The energy released process of methane formation can be used for bacterial cell formation. acts an electron sink into which hydrogen from all ruminal microorganisms drains, allowing higher yield adenosine triphosphate. Factors such type carbohydrate diet, level feed intake, digesta passage rate presence ionophores or lipids and ambient temperature influence emission ruminants. Methanobrevibacter spp....