A5013312885- Milk Quality and Mastitis in Dairy Cows
- Reproductive Physiology in Livestock
- Infant Nutrition and Health
- Ruminant Nutrition and Digestive Physiology
- Effects of Environmental Stressors on Livestock
- Animal Genetics and Reproduction
- Genetic and phenotypic traits in livestock
- Animal health and immunology
- Probiotics and Fermented Foods
- Fatty Acid Research and Health
- Microbial infections and disease research
- Cancer Cells and Metastasis
- Digestive system and related health
- Animal Behavior and Welfare Studies
- Biopolymer Synthesis and Applications
- Phytoestrogen effects and research
- Collagen: Extraction and Characterization
- Meat and Animal Product Quality
- Aquaculture disease management and microbiota
- Bacteriophages and microbial interactions
- Gastrointestinal disorders and treatments
- Identification and Quantification in Food
- Infant Health and Development
- Pediatric health and respiratory diseases
- Cancer Risks and Factors
The Ohio State University
2019-2024
College of Wooster
2023
National Health Council
2021
Virginia Tech
2016-2019
Washington State University
2014
Subclinical mastitis reduces milk yield and elicits undesirable changes in composition, but the mechanisms resulting reduced production affected mammary glands are incompletely understood. This study investigated effects of sterile inflammation on gland metabolism by assessing venous blood composition. Mid-lactation primiparous Holstein cows (n = 4) had udder halves randomly allocated to treatments; quarters 1 half were infused with 2 billion cfu formalin fixed Staphylococcus aureus...
Intramammary infections in nonlactating mammary glands are common and can occur during periods of rapid epithelial cell (MEC) accumulation, which may ultimately reduce total MEC numbers. Reduced numbers, resulting from impaired proliferation increased cellular apoptosis, expected to future milk yields. The objective this study was measure the degree apoptosis stromal compartment uninfected Staphylococcus aureus-infected hormonally induced grow rapidly. Nonpregnant heifers (n = 8) between 11...
Preweaning diet is known to affect rumen tissue appearance at the gross level. The objectives of this experiment were investigate effects different preweaning diets on growth and development epithelium putative epithelial stem progenitor cell measurements gene levels. Neonatal Holstein bull calves (n = 11) individually housed randomly assigned 1 2 diets. milk replacer only (MRO; n 5) or with starter (MRS; 6). Diets isoenergetic (3.87 ± 0.06 Mcal metabolizable energy per day) isonitrogenous...
Intramammary infections (IMI) are prevalent in non-lactating dairy cattle and their occurrence during periods of significant mammary growth development (i.e. pregnant heifers dry cows) is believed to interfere with growth, development, subsequent milk production. However, direct study IMI impacts on but developing glands lacking. The objectives this were (1) define how affected total differential secretion somatic cell counts stimulated rapidly grow using estradiol progesterone, (2)...
Mastitis is a common and costly disease in the dairy industry that reduces milk production affected mammary glands. The local mechanisms result reduced of glands are incompletely understood; elucidation these dependent on use hypothesis testing studies, but few experimental models exist. objective this study was to develop mastitis challenge model, using split udder design, reduce yields by approximately 15% halves challenged with oyster glycogen, known inducer leukocyte recruitment,...
Teat dips are used to reduce the incidence of new intramammary infection (IMI) on dairies. Although it is widely acknowledged that many factors affect teat dip efficacy and all should be confirmed efficacious before commercial circulation, studies evaluating differ in experimental design, pathogen profiles at herd level, tested, among other factors. The objective present study was conduct a meta-analysis data from peer-reviewed trials natural exposure design identify influencing IMI rate. A...
Intramammary infections (IMI) are common in nonlactating dairy cattle and expected to impair mammary growth development reduce future milk production. The objective of this study was histologically evaluate how IMI alter tissue structure growing developing heifer glands. A total 18 nonpregnant, heifers between 11 14 mo age were used the present study. Heifers received daily supraphysiological injections estradiol progesterone for d stimulate rapid development. One-quarter each subsequently...
Using an effective teat dip before and after milking reduces the incidence of new intramammary infection (IMI) on dairies. Many factors influence a dip's efficacy, this is why all dips should be confirmed efficacious commercial circulation. To date, many efficacy trials have been conducted are published in peer-reviewed journals. The objective present study was to conduct meta-analysis data from that used experimental challenge design identify influencing IMI rate. A dataset 21 studies (148...
This experiment investigated the effects of feeding low and high supplies vitamin A (VA) during transition period on plasma metabolites, prevalence ketosis, early milk production. In a randomized complete block design, 42 prefresh Holstein cows 21 heifers were blocked by parity calving date assigned to 1 3 dietary treatments (n = per treatment unless noted): CON, diet with supplemental VA (75,000 IU/d) meet requirement; LVA, no VA; or HVA, receiving (187,500 2.5 times greater than...