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Articles 1 - 14 of 14
Full-Text Articles in Life Sciences
Summer-Long Grazing Of High Vs. Low Endophyte (Neotyphodium Coenophialum)-Infected Tall Fescue By Growing Beef Steers Results In Distinct Temporal Blood Analyte Response Patterns, With Poor Correlation To Serum Prolactin Levels, Joshua J. Jackson, Merlin D. Lindemann, James A. Boling, James C. Matthews
Summer-Long Grazing Of High Vs. Low Endophyte (Neotyphodium Coenophialum)-Infected Tall Fescue By Growing Beef Steers Results In Distinct Temporal Blood Analyte Response Patterns, With Poor Correlation To Serum Prolactin Levels, Joshua J. Jackson, Merlin D. Lindemann, James A. Boling, James C. Matthews
Animal and Food Sciences Faculty Publications
Previously, we reported the effects of fescue toxicosis on developing Angus-cross steer growth, carcass, hepatic mRNA, and protein expression profiles of selected serum proteins, and blood clinical and chemical profiles, after summer-long grazing (85 days) of high endophyte (HE)- vs. low endophyte (LE)-infected fescue pastures. We now report the temporal development of acute, intermediate, and chronic responses of biochemical and clinical blood analytes determined at specified time intervals (period 1, day 0–36; period 2, day 37–58; and period 3, day 59–85). Throughout the trial, the alkaloid concentrations of the HE forage was consistently 19–25 times greater (P ≤ 0.002) …
Investigations Into The Cross-Infectivity Of Nematode Parasites Of Cattle And Sheep, Eva Marie Wray
Investigations Into The Cross-Infectivity Of Nematode Parasites Of Cattle And Sheep, Eva Marie Wray
Graduate Theses and Dissertations
The existence of anthelmintic resistance is not singular in parasite species, host species or geographic region. It has become a problem of worldly stature, especially when considering sheep nematodes. Recommendations have been modified from chemical-based control to multipart, managerial intervention. Compared with nematodes of cattle, the worldwide resistance of sheep nematodes to anthelmintic remedies is much more pronounced and urgent. As the resistance to essentially all anthelmintic classes approaches a cautionary level, the implementation of non-chemical controls has grown increasingly essential. Six-6 to 8 month old Holstein steer calves, six-5 month old Katahdin ram lambs and eight-5 month old Suffolk …
Dietary Strategies For Mitigation Of Methane Production By Growing And Finishing Cattle, Anna C. Pesta
Dietary Strategies For Mitigation Of Methane Production By Growing And Finishing Cattle, Anna C. Pesta
Department of Animal Science: Dissertations, Theses, and Student Research
Interest in reducing methane (CH4) emissions by cattle has increased recently. Loss of feed energy as CH4 represents both an environmental concern and an energetic loss to the animal. Manipulation of dietary composition has proven to be an effective mitigation strategy. Experiments were conducted to evaluate the effect of several dietary characteristics on CH4 production in growing and finishing cattle, and to develop a novel, non-invasive method for quantifying emissions from animals in a production setting. Short-term gaseous emissions of CH4 and carbon dioxide (CO2) were measured and the CH4:CO2 …
The Influence Of The Bovine Fecal Microbiota On The Shedding Of Shiga Toxin-Producing Escherichia Coli (Stec) By Beef Cattle, Nirosh D. Aluthge
The Influence Of The Bovine Fecal Microbiota On The Shedding Of Shiga Toxin-Producing Escherichia Coli (Stec) By Beef Cattle, Nirosh D. Aluthge
Department of Food Science and Technology: Dissertations, Theses, and Student Research
During the past three decades, Shiga toxin-producing E.coli (STEC) have emerged as an important food safety concern. Although initially E. coli O157 was the main focus, recent outbreaks and resulting investigations have shown that certain non-O157 STEC are as much a threat to food safety as their O157 counterparts. To the beef industry, STEC have been of particular concern due to the frequent association of beef and beef products as vehicles of STEC infection. As a result, along with E. coli O157, six non-O157 STEC serogroups (known as the ‘big six’) are now regulated as adulterants in certain raw beef …
Jcpenney As Cattleman, David Kruger
Jcpenney As Cattleman, David Kruger
David Delbert Kruger
Though widely known for his department store chain and its Wyoming origins, James Cash Penney also played a prominent role as a cattleman from the 1920s until his death in 1971. This presentation will explore Penney's personal and professional involvement in the cattle industry, including his significant contributions within the Angus, Hereford, and Guernsey breeds.
Estimation Of Breed-Specific Heterosis Effects For Birth, Weaning, And Yearling Weight In Cattle, Lauren N. Schiermiester, R. M. Thallman, Larry Kuehn, Stephen D. Kachman, Matthew L. Spangler
Estimation Of Breed-Specific Heterosis Effects For Birth, Weaning, And Yearling Weight In Cattle, Lauren N. Schiermiester, R. M. Thallman, Larry Kuehn, Stephen D. Kachman, Matthew L. Spangler
Department of Animal Science: Faculty Publications
Heterosis, assumed proportional to expected breed heterozygosity, was calculated for 6834 individuals with birth, weaning and yearling weight records from Cycle VII and advanced generations of the U.S. Meat Animal Research Center (USMARC) Germplasm Evaluation (GPE) project. Breeds represented in these data included: Angus, Hereford, Red Angus, Charolais, Gelbvieh, Simmental, Limousin and Composite MARC III. Heterosis was further estimated by proportions of British × British (B × B), British × Continental (B × C) and Continental × Continental (C × C) crosses and by breed-specific combinations. Model 1 fitted fixed covariates for heterosis within biological types while Model 2 fitted …
Exogenous Administration Of Lipids To Steers Alters Aspects Of The Innate Immune Response To Endotoxin Challenge, Nicole C. Burdick Sanchez, Jeffery A. Carroll, Janet R. Donaldson, Joe O. Buntyn, Ty B. Schmidt
Exogenous Administration Of Lipids To Steers Alters Aspects Of The Innate Immune Response To Endotoxin Challenge, Nicole C. Burdick Sanchez, Jeffery A. Carroll, Janet R. Donaldson, Joe O. Buntyn, Ty B. Schmidt
Department of Animal Science: Faculty Publications
This study examined the effects of increasing energy availability from both dextrose and lipid treatments on the proinflammatory response to LPS in Holstein steers. Steers were randomly assigned to one of three groups: saline at 0.5 ml/ kg body weight (Control) or 50% dextrose [0.5 ml/kg body weight (Dextrose) to mimic calm cattle’s response to LPS] administered immediately prior to LPS (0.5 mg/kg body weight at 0 h) or continuous lipid emulsion infusion from –1 to 6 h [Intralipid 20% (Baxter, Deerfield, IL USA); 0.5 ml/kg/hr (Lipid) to mimic temperamental cattle]. Concentrations of non-esterified fatty acids (NEFA) were greater in …
Cattle With Increased Severity Of Bovine Respiratory Disease Complex Exhibit Decreased Capacity To Protect Against Histone Cytotoxicity, J. A. Matera, B. K. Krehbiel, J. A. Hernandez Gifford, D. L. Step, C. R. Krehbiel, C. A. Gifford
Cattle With Increased Severity Of Bovine Respiratory Disease Complex Exhibit Decreased Capacity To Protect Against Histone Cytotoxicity, J. A. Matera, B. K. Krehbiel, J. A. Hernandez Gifford, D. L. Step, C. R. Krehbiel, C. A. Gifford
Department of Animal Science: Faculty Publications
Bovine respiratory disease complex (BRDC) is the leading cause of morbidity and mortality in feedlot cattle. Significant inflammation and lesions are often observed in lungs of infected cattle. During acute inflammatory responses, histones contribute to mortality in rodents and humans and serum proteins can protect against histone-induced cytotoxicity. We hypothesized that cattle experiencing chronic or fatal cases of BRDC have reduced ability to protect against cytotoxic effects of histones. Serum samples were collected from 66 bull calves at the time of normal feedlot processing procedures. Animals were retrospectively assigned to groups consisting of calves never treated for BRDC (control [CONT]; …
Case Study: Producer Concerns And Perceptions Regarding The Effect Of Methane On Cattle Production And The Environment: A Survey Of Nebraska Producers, B. M. Boyd, A. Jones, Lisa Franzen-Castle, K. Jenkins, Richard J. Rasby, Matt K. Luebbe, Richard R. Stowell, Samodha C. Fernando, Galen E. Erickson
Case Study: Producer Concerns And Perceptions Regarding The Effect Of Methane On Cattle Production And The Environment: A Survey Of Nebraska Producers, B. M. Boyd, A. Jones, Lisa Franzen-Castle, K. Jenkins, Richard J. Rasby, Matt K. Luebbe, Richard R. Stowell, Samodha C. Fernando, Galen E. Erickson
Department of Animal Science: Faculty Publications
Enteric methane production from cattle and its effect on climate change has been a topic of debate. Multiple studies have explored methods to reduce cattle enteric methane production while simultaneously improving performance. However, most strategies developed have not been widely implemented by cattle producers. Knowledge of producer concerns and perceptions on methane production from cattle and its effect on the environment may be limited. Therefore, the objectives of this survey were to determine what Nebraska producers know about methane production by cattle and how it affects performance and to determine whether different age groups, regions of Nebraska, and production size …
Single Nucleotide Polymorphism Identification And Characterization Of Gnrhr Gene In Bos Taurus And Bos Indicus Cattle, Ramesha Kerekoppa, Marappa Basavaraju, Akhila Rao, Gujjar Ramachandra Geetha, Kataktalware Mukund, Jeyakumar Sakthivel
Single Nucleotide Polymorphism Identification And Characterization Of Gnrhr Gene In Bos Taurus And Bos Indicus Cattle, Ramesha Kerekoppa, Marappa Basavaraju, Akhila Rao, Gujjar Ramachandra Geetha, Kataktalware Mukund, Jeyakumar Sakthivel
Turkish Journal of Veterinary & Animal Sciences
The hypothalamic gonadotropin-releasing hormone receptor (GnRHR) plays an essential physiological role in reproductive function. In this investigation, we studied genetic variation in the entire coding region of GnRHR gene using PCR-SSCP technique in 250 Bos taurus (Holstein Friesian, Jersey) and Bos indicus (Malnad Gidda, Deoni) bulls. The genetic variants in GnRHR gene were determined by PCR-SSCP technique by using 5 sets of primers. SSCP analysis of fragment 1, comprising exon 1, and fragment 3, comprising exon 2, revealed 2 SSCP patterns in all breeds under study, while fragment 2 of exon 1 and fragment 4, comprising exon 3, revealed 3 …
Estimating Allele Frequencies Of Some Hereditary Diseases In Holstein Cattlereared In Burdur Province, Turkey, Özgecan Korkmaz Ağaoğlu, Ali̇ Reha Ağaoğlu, Mustafa Saatci
Estimating Allele Frequencies Of Some Hereditary Diseases In Holstein Cattlereared In Burdur Province, Turkey, Özgecan Korkmaz Ağaoğlu, Ali̇ Reha Ağaoğlu, Mustafa Saatci
Turkish Journal of Veterinary & Animal Sciences
The economics of dairy cattle breeding around the world has been significantly affected by the autosomal recessive hereditary diseases of bovine leukocyte adhesion deficiency (BLAD), factor XI deficiency (FXID), bovine citrullinemia (BC), and deficiency of uridine monophosphate synthase (DUMPS). The aim of this study was to determine BLAD, FXID, BC, and DUMPS alleles in Holstein cattle raised in Burdur Province in Turkey. This study involved taking blood samples randomly from 500 head of Holstein cattle at various dairy farms in different towns in Burdur Province. Polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP) analysis was employed to identify cows …
Energy Status Of Steers Dictates Effectiveness Of Glycerol Inclusion In High-Roughage And High-Concentrate Feedlot Diets, Erin M. Rife
Energy Status Of Steers Dictates Effectiveness Of Glycerol Inclusion In High-Roughage And High-Concentrate Feedlot Diets, Erin M. Rife
Electronic Theses and Dissertations
The objective of this research was to determine how to use glycerol as an effective source of energy in ruminant diets. Steer calves were used in a 56 d backgrounding study (n=128; Initial BW=340 ± 15 kg) and 105 d finishing study (n=120; Initial BW=420 ± 20 kg). Dietary treatments during backgrounding included 0, 8, 16, and 24% glycerol replacing corn silage in corn silage-based diets. Steers continued on within relative levels of dietary glycerol with finishing diets consisting of 0, 5, 10, and 15% glycerol replacing corn. Cumulative DMI, ADG, and G:F increased linearly (P
A Study Evaluating Genetic Trends And Molecular Predisposition To Improved Carcass Quality Of Brahman And Brahman Influenced Cattle, Amanda M. Royer
A Study Evaluating Genetic Trends And Molecular Predisposition To Improved Carcass Quality Of Brahman And Brahman Influenced Cattle, Amanda M. Royer
LSU Master's Theses
The first objective of the current study was to evaluate genetic trends from 10 years of the American Brahman Breeders Association Carcass Evaluation Program from 2004 to 2013. Changes of performance in growth, carcass composition, and carcass quality traits were evaluated. Overall means were calculated to report the total average for each trait along with an average rate of change per year. Growth traits evaluated included feedlot entrance weight (INWT), harvest weight (HRVWT), and average daily gain (ADG). Carcass composition and quality traits evaluated included hot carcass weight (HCW), rib eye area (REA), marbling score (MARB), dressing percent (DP), quality …
Serological And Molecular Diagnosis Of Paratuberculosis In Dairy Cattle, Kadi̇r Semi̇h Gümüşsoy, Tuba İça, Seçi̇l Abay, Fuat Aydin, Harun Hizlisoy
Serological And Molecular Diagnosis Of Paratuberculosis In Dairy Cattle, Kadi̇r Semi̇h Gümüşsoy, Tuba İça, Seçi̇l Abay, Fuat Aydin, Harun Hizlisoy
Turkish Journal of Veterinary & Animal Sciences
In this study, the presence of paratuberculosis was investigated by serological and molecular methods in herds of dairy cattle. Blood, milk, and stool samples of 147 cows aged 2 years old or older with chronic diarrhea were collected. A California mastitis test (CMT) was performed on milk samples. Indirect paratuberculosis enzyme-linked immunosorbent assay (ELISA) test was used for serological investigation. Polymerase chain reaction (PCR) was utilized for molecular identification of Mycobacterium avium subsp. paratuberculosis (MAP) from milk and stool samples. Immunomagnetic separation (IMS) method was used for milk and fecal samples. Eighteen (12.24%), 44 (29.93%), 36 (24.49%), 28 (19.05%), and …