A5022797475- Reproductive Physiology in Livestock
- Ruminant Nutrition and Digestive Physiology
- Animal health and immunology
- Genetic and phenotypic traits in livestock
- Effects of Environmental Stressors on Livestock
- Milk Quality and Mastitis in Dairy Cows
- Animal Behavior and Welfare Studies
- Animal Disease Management and Epidemiology
- Animal Diversity and Health Studies
- Metabolomics and Mass Spectrometry Studies
- Prion Diseases and Protein Misfolding
- Reproductive System and Pregnancy
- T-cell and Retrovirus Studies
- Fatty Acid Research and Health
- Cancer-related molecular mechanisms research
- Immune Response and Inflammation
- Gut microbiota and health
- Probiotics and Fermented Foods
- Vector-Borne Animal Diseases
- Turfgrass Adaptation and Management
- Antimicrobial Peptides and Activities
- Viral gastroenteritis research and epidemiology
- Livestock Management and Performance Improvement
- Adipose Tissue and Metabolism
- Animal Nutrition and Physiology
University of Alberta
2016-2025
Food & Nutrition
2014-2022
Agriculture and Food
2022
Agriculture and Agri-Food Canada
2010
Iowa State University
1999-2006
United States Department of Agriculture
1996
Bovine milk is a nutritionally rich, chemically complex biofluid consisting of hundreds different components. While the chemical composition cow's has been studied for decades, much this information fragmentary and very dated. In an effort to consolidate update information, we have applied modern, quantitative metabolomics techniques along with computer-aided literature mining obtain most comprehensive up-to-date characterization constituents in commercial milk. Using nuclear magnetic...
Dairy cows fed high-grain diets during early lactation have a high incidence of metabolic disorders. However, the precise mechanism(s) how grain feeding causes disease is not clear. In an effort to understand this diet transition alters rumen environment and potentially leads certain disorders in dairy cattle, we undertook comprehensive, quantitative metabolomic analysis fluid samples from 4 different diets. Using combination proton nuclear magnetic resonance spectroscopy, gas...
The objective of this study was to investigate the relationship between activation acute phase response and fatty liver in transition dairy cows. Fatty induced cows by feeding 8 kg cracked corn 1 mo before expected day parturition. Liver blood samples were obtained at days -4, 3, 8, 12, 14, 22, 27, 36 postpartum. Cows that developed (n = 4) reached peak total lipids 12 postpartum with 11.4% (wet wt.) compared 6.6% control 4). had greater plasma tumor necrosis factor-alpha (TNF-α),...
Cinnamaldehyde (CIN), a natural chemical compound found in the bark of cinnamon trees, can alter rumen fermentation by inhibiting selected ruminal microbes, and consequently, may improve growth performance feed efficiency animals. The objective this study was to evaluate effects supplementing diet feedlot cattle with CIN on intake, performance, carcass characteristics, blood metabolites. Seventy yearling steers (BW = 390 ± 25.2 kg) were assigned randomized complete block design 5 treatments:...
The objective of this study was to determine if cinnamaldehyde (CIN) could be used improve feed intake, digestion, and immune status in growing beef heifers fed high-concentrate diets. experiment designed as a 4 × Latin square using ruminally duodenally cannulated with treatments: control (no CIN added), 400 mg/d (low), 800 (medium), 1,600 (high), four 21-d periods. Feed rumen pH fermentation characteristics, site extent microbial N synthesis, blood metabolites, acute phase protein response...
Uterine infections in dairy cows lower profitability of operations. Infections the reproductive tract are related to overgrowth pathogenic bacteria during first three weeks after parturition. However, alterations vaginal microbiota composition parturition remain poorly documented.In this study, isolated from vagina healthy pregnant, and infected postpartum were characterised by random amplification polymorphic DNA (RAPD) analysis partial 16S ribosomal RNA (rDNA) gene sequencing. Populations...
The objective of this investigation was to evaluate whether intravaginal infusion a lactic acid bacteria (LAB) cocktail around parturition could influence the immune response, incidence rate uterine infections, and overall health status periparturient dairy cows. One hundred pregnant Holstein cows were assigned 1 3 experimental groups as follows: 1) one dose LAB on wk -2 -1, carrier (sterile skim milk) +1 relative expected day (TRT1); 2) -2, (TRT2), 3) (CTR). lyophilized culture mixture...
The objectives of this study were to determine alterations in the serum metabolites related amino acid (AA), carbohydrate, and lipid metabolism transition dairy cows before diagnosis subclinical mastitis (SCM), during, after disease. A case was determined as a cow having somatic cell count (SCC) > 200 000/mL milk for two or more consecutive reports. Blood samples collected from 100 Holstein at five time points -8 -4 weeks parturition, week SCM diagnosis, +4 +8 parturition. Twenty healthy...
Periparturient diseases continue to be the greatest challenge both farmers and dairy cows. They are associated with a decrease in productivity, lower profitability, negative impact on cows’ health as well public health. This review article discusses pathophysiology diagnostic opportunities of mastitis, most common disease To better understand disease, we dive deep into causative agents, traditional paradigms, use new technologies for diagnosis, treatment, prevention mastitis. paper takes...
In this review article we present an overall summary of the role that high-grain/low forage diets have on rumen composition microbiota and how changes in diet affect release bacterial cell wall components are toxic to host. One these compounds is lipopolysaccharide or endotoxin, a component outer membrane all Gram-negative bacteria. Moreover, data provided support concept endotoxin translocates into blood circulation show associated with multiple perturbations variables related carbohydrate,...