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Dairy Science Commons

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2014

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Articles 1 - 23 of 23

Full-Text Articles in Dairy Science

The Effects Of Hmtba (2-Hydroxy-4-Methylthio-Butanoic Acid) Supplementation On Ruminal Microbial Crude Protein Synthesis And Community Structure In Dairy Cattle, Chad J. R. Jenkins Nov 2014

The Effects Of Hmtba (2-Hydroxy-4-Methylthio-Butanoic Acid) Supplementation On Ruminal Microbial Crude Protein Synthesis And Community Structure In Dairy Cattle, Chad J. R. Jenkins

Department of Animal Science: Dissertations, Theses, and Student Research

Metabolizable protein (MP) is protein that reaches the small intestine and is available for absorption and utilization by the cow. Dairy rations may be limited in the supply of MP essential to meeting the demands of milk synthesis, however as much as half of the MP flowing to the small intestine may be attributed to microbial origins and is referred to as microbial CP (MCP). Experiment 1 utilized a technique in which DNA was used as a microbial marker to estimate the concentration of bacterial CP (BCP) in the solid and liquid portions of rumen digesta. Rumen digesta was sampled …


Efficient Gene Targeting In Golden Syrian Hamsters By The Crispr/Cas9 System, Zhiqiang Fan, Wei Li, Sang R. Lee, Qinggang Meng, Tom D. Bunch, Kenneth L. White, Zhongde Wang, Il-Keun Kong Oct 2014

Efficient Gene Targeting In Golden Syrian Hamsters By The Crispr/Cas9 System, Zhiqiang Fan, Wei Li, Sang R. Lee, Qinggang Meng, Tom D. Bunch, Kenneth L. White, Zhongde Wang, Il-Keun Kong

Animal, Dairy, and Veterinary Science Faculty Publications

The golden Syrian hamster is the model of choice or the only rodent model for studying many human diseases. However, the lack of gene targeting tools in hamsters severely limits their use in biomedical research. Here, we report the first successful application of the CRISPR/Cas9 system to efficiently conduct gene targeting in hamsters. We designed five synthetic single-guide RNAs (sgRNAs)—three for targeting the coding sequences for different functional domains of the hamster STAT2 protein, one for KCNQ1, and one for PPP1R12C—and demonstrated that the CRISPR/Cas9 system is highly efficient in introducing site-specific mutations in hamster somatic cells. We …


Choline And Choline Metabolite Patterns And Associations In Blood And Milk During Lactation In Dairy Cows, Virginia M. Artegoitia, Jesse L. Foote, Federico M. Harte, Shawn R. Campagna, Michael J. De Veth Aug 2014

Choline And Choline Metabolite Patterns And Associations In Blood And Milk During Lactation In Dairy Cows, Virginia M. Artegoitia, Jesse L. Foote, Federico M. Harte, Shawn R. Campagna, Michael J. De Veth

Department of Animal Science: Faculty Publications

Milk and dairy products are an important source of choline, a nutrient essential for human health. Infant formula derived from bovine milk contains a number of metabolic forms of choline, all contribute to the growth and development of the newborn. At present, little is known about the factors that influence the concentrations of choline metabolites in milk. The objectives of this study were to characterize and then evaluate associations for choline and its metabolites in blood and milk through the first 37 weeks of lactation in the dairy cow. Milk and blood samples from twelve Holstein cows were collected in …


Energy Content Of Reduced-Fat Dried Distillers Grains And Solubles For Lactating Dairy Cows And Effects On Energy And Nitrogen Balance, Alison J. Foth Aug 2014

Energy Content Of Reduced-Fat Dried Distillers Grains And Solubles For Lactating Dairy Cows And Effects On Energy And Nitrogen Balance, Alison J. Foth

Department of Animal Science: Dissertations, Theses, and Student Research

Eight Holstein and 8 Jersey multiparous, lactating cows were used to complete 56 energy balances to determine the energy content of reduced-fat distillers grains and solubles (RFDDGS). A repeated switchback design was used to compare treatments with and without RFDDGS. Diets consisted of 24.2 % corn silage, 18.4 % alfalfa hay, 6.94 % brome hay with either 22.9 % rolled corn and 14.8 % soybean meal (Control), or 8.95 % rolled corn, 28.8 % RFDDGS, and 0 % soybean meal (Co-P; DM basis). The inclusion of RFDDGS did not affect (P = 0.86) DMI averaging 21.4 ± 0.53 kg …


2013 Annual Report, Various Authors Jun 2014

2013 Annual Report, Various Authors

Annual Reports

No abstract provided.


Evaluating Colostrum Quality With Niacin Supplementation In The Diet Of Dairy Cattle, Allison Marie Pike May 2014

Evaluating Colostrum Quality With Niacin Supplementation In The Diet Of Dairy Cattle, Allison Marie Pike

Student Research Projects

Dairy calves are born with a naive immune system, and must obtain passive immunity through ingestion of colostrum. Colostrum provides the newborn with antimicrobial proteins called immunoglobulins, such as immunoglobulin G (IgG), that protect the calf for the first few weeks of life. Calves that receive good quality colostrum (>50 g/L of IgG) are more likely to survive to adulthood. Niacin is a vasodilator that may increase blood flow to the mammary gland during production of colostrum in the mother. This experiment investigated the effect of niacin supplementation at a rate of 48 g/cow/day for 3 weeks before calving …


Methods Of Bovine Reproduction, Kelsey L. O'Donnell Apr 2014

Methods Of Bovine Reproduction, Kelsey L. O'Donnell

Honors Scholar Theses

The beef and dairy cattle industries are of immense economic value in the United States and have made impressive advancements over the past century. Their success depends strongly upon the reproductive efficiency of their breeding programs. This overview discusses the major advancements in bovine reproduction that have been integrated into the beef and dairy cattle industries and also the emerging technologies that are currently being researched. Current practices like artificial insemination and estrus synchronization resulted from the development of a strong understanding of cattle physiology and the endocrinology of the estrous cycle. With these technologies, selection of superior genetic traits …


Tracking Heat-Resistant, Sporeforming Bacteria In The Milk Chain: A Farm To Table Approach, Maricarmen Estrada Anzueto Apr 2014

Tracking Heat-Resistant, Sporeforming Bacteria In The Milk Chain: A Farm To Table Approach, Maricarmen Estrada Anzueto

Department of Food Science and Technology: Dissertations, Theses, and Student Research

Sporeforming bacteria (such as Bacillus and Paenibacillus spp.) can survive pasteurization conditions (Collins, 1981) and grow in pasteurized fluid milk during refrigerated storage (Huck et al., 2008; Ivy et al., 2012), causing fluid milk spoilage and limiting the further extension of fluid milk’s shelf life (Fromm and Boor, 2004; Durak et al., 2006). Moreover, Bacillus and related genera have been found in raw milk, pasteurized milk and environmental samples from dairy farms, indicating that these organisms are ubiquitous in nature and can enter the milk chain from different sources (Huck et al., 2007b; Huck et al., 2008; Ranieri and Boor, …


Halogeton (H. Glomeratus) Poisoning In Cattle: Case Report, Kerry A. Rood, Kip E. Panter, Dale R. Gardner, Bryan L. Stegelmeier, Jeffery O. Hall Apr 2014

Halogeton (H. Glomeratus) Poisoning In Cattle: Case Report, Kerry A. Rood, Kip E. Panter, Dale R. Gardner, Bryan L. Stegelmeier, Jeffery O. Hall

Animal, Dairy, and Veterinary Science Faculty Publications

Historically, the most significant losses from halogeton poisoning have been reported in sheep, with multiple catastrophic deaths documented. While recorded death losses in cattle from halogeton poisoning are less common than in sheep, recent cases, including 2 reported here, and anecdotal reports from other ranchers suggest that the impact of halogeton losses in cattle herds in the western United States is much more widespread than originally thought. Halogeton may accumulate up to 30% oxalates; a small amount of the plant (300 g) is enough to cause death in sheep. Oxalates precipitate calcium from the blood, resulting in hypocalcemia, formation of …


Triple Immunoglobulin Gene Knockout Transchromosomic (Tc) Cattle: Bovine Lambda Cluster Deletion And Its Effect On Fully Human Polyclonal Antibody Production, H. Matsushita, A. Sano, H. Wu, J. Jiao, P. Kasinathan, E. J. Sullivan, Zhongde Wang, K. Kuroiwa Mar 2014

Triple Immunoglobulin Gene Knockout Transchromosomic (Tc) Cattle: Bovine Lambda Cluster Deletion And Its Effect On Fully Human Polyclonal Antibody Production, H. Matsushita, A. Sano, H. Wu, J. Jiao, P. Kasinathan, E. J. Sullivan, Zhongde Wang, K. Kuroiwa

Animal, Dairy, and Veterinary Science Faculty Publications

Towards the goal of producing fully human polyclonal antibodies (hpAbs or hIgGs) in transchromosomic (Tc) cattle, we previously reported that Tc cattle carrying a human artificial chromosome (HAC) comprising the entire unrearranged human immunoglobulin (Ig) heavy-chain (hIGH), kappa-chain (hIGK), and lambda-chain (hIGL) germline loci produced physiological levels of hIgGs when both of the bovine immunoglobulin mu heavy-chains, bIGHM and bIGHML1, were homozygously inactivated (bIGHM-/-, bIGHML1-/-; double knockouts or DKO). However, because endogenous bovine immunoglobulin light chain loci are still intact, the light chains are produced both from the hIGK and hIGL genomic loci on the HAC and from the endogenous …


Culturally Speaking: The Time Is Right For Drinkable Yogurts To Take Off In The United States, Phillip Tong Feb 2014

Culturally Speaking: The Time Is Right For Drinkable Yogurts To Take Off In The United States, Phillip Tong

Dairy Science

No abstract provided.


Phages Of Non-Diary Lactococci: Isolation And Characterization Of Phi L47, A Phage Infecting The Grass Isolate Lactococcus Lactis Ssp Cremoris Dpc6860, Daniel Cavanagh, Caitríona M. Guinane, Horst Neve, Aidan Coffey, R. Paul Ross, Gerald F. Fitzgerald, Olivia Mcauliffe Jan 2014

Phages Of Non-Diary Lactococci: Isolation And Characterization Of Phi L47, A Phage Infecting The Grass Isolate Lactococcus Lactis Ssp Cremoris Dpc6860, Daniel Cavanagh, Caitríona M. Guinane, Horst Neve, Aidan Coffey, R. Paul Ross, Gerald F. Fitzgerald, Olivia Mcauliffe

Department of Biological Sciences Publications

Lactococci isolated from non-dairy sources have been found to possess enhanced metabolic activity when compared to dairy strains. These capabilities may be harnessed through the use of these strains as starter or adjunct cultures to produce more diverse flavor profiles in cheese and other dairy products. To understand the interactions between these organisms and the phages that infect them, a number of phages were isolated against lactococcal strains of non-dairy origin. One such phage, ΦL47, was isolated from a sewage sample using the grass isolate L. lactis ssp. cremoris DPC6860 as a host. Visualization of phage virions by transmission electron …


Nebraska Bqa: Antibiotic Use Guidelines, Rob Eirich Jan 2014

Nebraska Bqa: Antibiotic Use Guidelines, Rob Eirich

Nebraska Beef Quality Assurance Program

Cattlemen have demonstrated a commitment to animal health through vaccination programs developed carefully in cooperation with their veterinarian. When animals must be treated with an antibiotic after disease diagnosis, producers need to follow important antibiotic use guidelines established through the National Beef Quality Assurance (BQA) program.


Nebraska Bqa: Effective Cattle Handling, Rob Eirich Jan 2014

Nebraska Bqa: Effective Cattle Handling, Rob Eirich

Nebraska Beef Quality Assurance Program

Cattlemen know the importance of proper cattle handling and its effect on animal health and performance. Beef Quality Assurance has been implementing effective cattle handling (low-stress) into educational programs since its establishment in the 1980s.


Handling Cattle Through High Heat Humidity Indexes, Rob Eirich Jan 2014

Handling Cattle Through High Heat Humidity Indexes, Rob Eirich

Nebraska Beef Quality Assurance Program

As cattlemen enter the summer months, they need to understand and deal with heat and humidity. Consider incorporating the following practices into management plans to help reduce additional stress.


Nebraska Bqa: Handling Compromised Animals, Rob Eirich Jan 2014

Nebraska Bqa: Handling Compromised Animals, Rob Eirich

Nebraska Beef Quality Assurance Program

Cattle producers have long recognized the need of proper husbandry and stewardship for the animals entrusted into their care. Best livestock production practices, based on research and sound science, help ensure the well-being, animal health and productivity of cattle.


Calf Branding/Processing Time And Beef Quality Assurance, Rob Eirich Jan 2014

Calf Branding/Processing Time And Beef Quality Assurance, Rob Eirich

Nebraska Beef Quality Assurance Program

It is spring and that means branding time across cattle country. As producers are finishing calving season and preparing for branding/processing, it is important to review Beef Quality Assurance (BQA) guidelines. Let's take a minute to look at the key BQA principles:


Audits And Assessments In Beef Cattle Production, Rob Eirich Jan 2014

Audits And Assessments In Beef Cattle Production, Rob Eirich

Nebraska Beef Quality Assurance Program

Assessments and audits are becoming a part of doing business in beef cattle production, as we are seeing beef processors implementing third-party audits. Since beginning as the Nebraska Director of Beef Quality Assurance (BQA) in July, I have been studying and gathering information on the National Cattlemen's Beef Association (NCBA) Assessment Guides and third-party audits in the beef industry.


Nebraska Beef Quality Assurance: Focused On The Safety, Wholesomeness And Quality Of Beef Jan 2014

Nebraska Beef Quality Assurance: Focused On The Safety, Wholesomeness And Quality Of Beef

Nebraska Beef Quality Assurance Program

Across the nation, beef producers face the challenge of making a living from the land, while producing safe, wholesome beef. Beef that will provide a great eating experience each and every time for American and International consumers.


Dairy Digest 2014, South Dakota State University Dairy Club Jan 2014

Dairy Digest 2014, South Dakota State University Dairy Club

Dairy Digest

No abstract provided.


The Jackrabbit Dairy Review, Vikram Mistry Jan 2014

The Jackrabbit Dairy Review, Vikram Mistry

The Jackrabbit Dairy & Food Review

No abstract provided.


Johne's Disease, Mycoplasma And Bvd In Utah - Bulk Tank Milk Testing And Comparison To Previous Regional Prevalence And Individual Herd Results Over Time, David J. Wilson, Kerry A. Rood, J. Bunnell, C. Whitehouse, G. M. Goodell, T. M. Byrem Jan 2014

Johne's Disease, Mycoplasma And Bvd In Utah - Bulk Tank Milk Testing And Comparison To Previous Regional Prevalence And Individual Herd Results Over Time, David J. Wilson, Kerry A. Rood, J. Bunnell, C. Whitehouse, G. M. Goodell, T. M. Byrem

Animal, Dairy, and Veterinary Science Faculty Publications

Dairy herd-level prevalence of Mycobacterium avium subsp. paratuberculosis (MAP), causative agent of Johne’s disease (JD), Mycoplasma spp., and Bovine Viral Diarrhea (BVD) virus were estimated in Utah and surrounding states and compared to previous surveillance results. Milk was collected at 3-4 day intervals on 5 dates (duplicate samples) from each bulk tank on participating farms, samples analyzed separately. One frozen sample was shipped to a laboratory for JD/MAP testing with ELISA and real-time PCR, the other paired sample was shipped to another laboratory for mycoplasma and BVD testing. Mycoplasma was cultured on modified Hayflick medium, standard methods; BVD testing was …


Activating The Expression Of Human K-Rasg12d Stimulates Oncogenic Transformation In Transgenic Goat Fetal Fibroblast Cells, J. Gong, Zhongde Wang, I. Polejaeva, R. Salgia, C. Kao, T. Chen, L. Chen Jan 2014

Activating The Expression Of Human K-Rasg12d Stimulates Oncogenic Transformation In Transgenic Goat Fetal Fibroblast Cells, J. Gong, Zhongde Wang, I. Polejaeva, R. Salgia, C. Kao, T. Chen, L. Chen

Animal, Dairy, and Veterinary Science Faculty Publications

Humane use of preclinical large animal cancer models plays a critical role in understanding cancer biology and developing therapeutic treatments. Among the large animal candidates, goats have great potentials as sustainable sources for large animal cancer model development. Goats are easier to handle and cheaper to raise. The genome of the goats has been sequenced recently. It has been known that goats develop skin, adrenal cortex, breast and other types of cancers. Technically, goats are subject to somatic cell nuclear transfer more efficiently and exhibit better viability through the cloning process. Towards the development of a goat cancer model, we …