Open Access. Powered by Scholars. Published by Universities.®

Large or Food Animal and Equine Medicine Commons

Open Access. Powered by Scholars. Published by Universities.®

2,085 Full-Text Articles 3,555 Authors 242,997 Downloads 28 Institutions

All Articles in Large or Food Animal and Equine Medicine

Faceted Search

2,085 full-text articles. Page 1 of 47.

A Latent Spatial Piecewise Exponential Model For Interval-Censored Disease Surveillance Data With Time-Varying Covariates And Misclassification, Yaxuan Sun, Chong Wang, William Q. Meeker, Max Morris, Marisa L. Rotolo, Jeffery Zimmerman 2019 Iowa State University

A Latent Spatial Piecewise Exponential Model For Interval-Censored Disease Surveillance Data With Time-Varying Covariates And Misclassification, Yaxuan Sun, Chong Wang, William Q. Meeker, Max Morris, Marisa L. Rotolo, Jeffery Zimmerman

Veterinary Diagnostic and Production Animal Medicine Publications

Understanding the dynamics of disease spread is critical to achieving effective animal disease surveillance. A major challenge in modeling disease spread is the fact that the true disease status cannot be known with certainty due to the imperfect diagnostic sensitivity and specificity of the tests used to generate the disease surveillance data. Other challenges in modeling such data include interval censoring, relating disease spread to distance between units, and incorporating time-varying covariates, which are the unobserved disease statuses. We propose a latent spatial piecewise exponential model (PEX) with misclassification of events to address the challenges in modeling such disease surveillance ...


Bacterial Abundance And Resistance In Ground Beef Varieties, Savannah Kumar, Sarah M. Boomer 2018 Western Oregon University

Bacterial Abundance And Resistance In Ground Beef Varieties, Savannah Kumar, Sarah M. Boomer

PURE Insights

Raw ground beef purchased at supermarkets across America have one thing in common: they harbor bacteria, some of which are drug resistant and can be detrimental to public health. To understand the impact of farming and processing practices on the quantity of bacteria and drug resistance, organic and regular beef were assessed using MacConkey media. Bacterial colonies were sorted according to lactose utilization, with positive colonies representing fecal E. coli. Lactose negative colonies were further characterized into one of two groups (fecal Hafnia-like or soil Pseudomonas) using a variety of metabolic tests (oxidase, sulfur, indole). Advanced metabolic testing showed that ...


Surveillance For Respiratory And Diarrheal Pathogens At The Human-Pig Interface In Sarawak, Malaysia, Laura K. Borkenhagen, Kerry A. Mallinson, Rick W. Tsao, Siaw-Jing Ha, Wei-Honn Lim, Teck-Hock Toh, Benjamin D. Anderson, Jane K. Fieldhouse, Sarah E. Philo, Kuek-Sen Chong, William G. Lindsley, Alejandro Ramirez, James F. Lowe, Kristen K. Coleman, Gregory C. Gray 2018 Duke University

Surveillance For Respiratory And Diarrheal Pathogens At The Human-Pig Interface In Sarawak, Malaysia, Laura K. Borkenhagen, Kerry A. Mallinson, Rick W. Tsao, Siaw-Jing Ha, Wei-Honn Lim, Teck-Hock Toh, Benjamin D. Anderson, Jane K. Fieldhouse, Sarah E. Philo, Kuek-Sen Chong, William G. Lindsley, Alejandro Ramirez, James F. Lowe, Kristen K. Coleman, Gregory C. Gray

Veterinary Diagnostic and Production Animal Medicine Publications

Background The large livestock operations and dense human population of Southeast Asia are considered a hot-spot for emerging viruses.

Objectives To determine if the pathogens adenovirus (ADV), coronavirus (CoV), encephalomyocarditis virus (EMCV), enterovirus (EV), influenza A-D (IAV, IBV, ICV, and IDV), porcine circovirus 2 (PCV2), and porcine rotaviruses A and C (RVA and RVC), are aerosolized at the animal-interface, and if humans working in these environments are carrying these viruses in their nasal airways.

Study This cross-sectional study took place in Sarawak, Malaysia among 11 pig farms, 2 abattoirs, and 3 animal markets in June and July of 2017. Pig ...


The Study Design Elements Employed By Researchers In Preclinical Animal Experiments From Two Research Domains And Implications For Automation Of Systematic Reviews, Annette M. O'Connor, Sarah C. Totton, Jonah C. Cullen, Mahmood Ramezani, Vijay Kalivarapu, Chaohui Yuan, Stephen B. Gilbert 2018 Iowa State University

The Study Design Elements Employed By Researchers In Preclinical Animal Experiments From Two Research Domains And Implications For Automation Of Systematic Reviews, Annette M. O'Connor, Sarah C. Totton, Jonah C. Cullen, Mahmood Ramezani, Vijay Kalivarapu, Chaohui Yuan, Stephen B. Gilbert

Veterinary Diagnostic and Production Animal Medicine Publications

Systematic reviews are increasingly using data from preclinical animal experiments in evidence networks. Further, there are ever-increasing efforts to automate aspects of the systematic review process. When assessing systematic bias and unit-of-analysis errors in preclinical experiments, it is critical to understand the study design elements employed by investigators. Such information can also inform prioritization of automation efforts that allow the identification of the most common issues. The aim of this study was to identify the design elements used by investigators in preclinical research in order to inform unique aspects of assessment of bias and error in preclinical research. Using 100 ...


30-Day Oral Acetaminophen Tolerance In Adult Horses, Sarah E. Foreman 2018 Augustana College, Rock Island Illinois

30-Day Oral Acetaminophen Tolerance In Adult Horses, Sarah E. Foreman

Celebration of Learning

There are no controlled studies of acetaminophen toxicity in horses. The objective was to test the hypotheses that oral acetaminophen administered at a dosage 25% higher than that sometimes used in horses would result in measurable hepatic toxicity as seen in humans and other species. Six healthy adult horses were administered 25 mg/kg acetaminophen powder in corn syrup twice daily for 30 days. Three other horses served as negative controls receiving only corn syrup. Jugular venous blood samples were obtained on days 7 and 1 before treatment; on treatment days 1, 2, 5, 8, 12, 15, 19, 22, 26 ...


Improving Techniques To Study Equine Cervical Mucociliary Clearance, Melissa A. Hawkes 2018 University of Maine

Improving Techniques To Study Equine Cervical Mucociliary Clearance, Melissa A. Hawkes

Electronic Theses and Dissertations

Bacterial uterine infections inflict major losses on the equine breeding industry. These infections usually arise from bacteria introduced at breeding. Micro-currents propelled by ciliated cells between the folds of the uterus and cervix have been proposed as a means by which contaminants are expelled. Previous data have shown possible ciliary micro-currents propelling carbon particles, occasionally rotating, through cervical folds. However, adherence to the epithelium may have interfered with movement of carbon in these studies. Therefore, we tested potentially non-adherent substances to reveal ciliary micro-currents on the equine cervix under high magnification video-endoscopy. We hypothesized that polyethylene green microspheres 1 - 5 ...


The Effect Of High Maternal Milk Production During Pregnancy On Neonatal Health And Metabolism, Katelynn Cameron, Maria L. Hoffman PhD 2018 University of Rhode Island

The Effect Of High Maternal Milk Production During Pregnancy On Neonatal Health And Metabolism, Katelynn Cameron, Maria L. Hoffman Phd

Senior Honors Projects

The efficiency of the dairy industry relies heavily on the production of healthy calves. However, dairy operations experience high rates of calf mortality due to digestive and respiratory issues. One factor that could predispose calves to disease is the effects of maternal programming caused by high maternal milk production during pregnancy. We hypothesized that calves born to high producing dams will exhibit increased oxidative stress as well as increased circulating triglyceride and total cholesterol concentrations. Cows (n = 17) that produced ≥ 14,865 kg of milk during their lactations were classified as high producers. Alternately, cows (n = 18) that produced ≤ 10 ...


Comparing The Efficacy Of Copper Oxide Wire Particles And Copper Sulfate On Haemonchus Contortus In Goats, James Mackey 2018 Murray State University

Comparing The Efficacy Of Copper Oxide Wire Particles And Copper Sulfate On Haemonchus Contortus In Goats, James Mackey

Honors College Theses

This is a comparative study on the anthelmintic effects of copper oxide wire particles (COWP), copper sulfate (CuSO4), and Levamisole on Haemonchus contortus in goats. This study was designed to compare the efficiency of COWP and CuSO4 at controlling H. contortus populations in goats. A study group of 60 female goats was randomly separated into 3 groups. The does in each group were administered either a copper sulfate drench by weight, a Levamisole drench by weight, or a 4g bolus of COWP. Fecal egg counts and Faffa Malan Charts (FAMACHA), were performed every 2 weeks, and Packed Cell ...


Effects Of Fescue Toxicosis On Whole Blood Gene Expression In Beef Cattle, Julie Atchley 2018 University of Arkansas, Fayetteville

Effects Of Fescue Toxicosis On Whole Blood Gene Expression In Beef Cattle, Julie Atchley

Animal Science Undergraduate Honors Theses

Effects of Fescue Toxicosis on Whole Blood Gene Expression in Beef Cattle

The consumption of endophyte-infected tall fescue causes negative effects on the growth, reproduction, longevity, and overall health of beef cattle; this condition, termed fescue toxicosis by researchers and producers today, costs the United States over $1 billion in losses each year. To mitigate these production losses, it is important for producers to understand how fescue toxicosis affects gene expression and physiological pathways in beef cattle. This study examined the whole blood gene expression and affected pathways in beef cows grazing both endophyte-infected (toxic) tall fescue and (non-toxic) tall ...


Downregulation Of Microrna Eca-Mir-128 In Seminal Exosomes And Enhanced Expression Of Cxcl16 In The Stallion Reproductive Tract Are Associated With Long-Term Persistence Of Equine Arteritis Virus, Mariano Carossino, Pouya Dini, Theodore S. Kalbfleisch, Alan T. Loynachan, Igor F. Canisso, Kathleen M. Shuck, Peter J. Timoney, R. Frank Cook, Udeni B. R. Balasuriya 2018 University of Kentucky

Downregulation Of Microrna Eca-Mir-128 In Seminal Exosomes And Enhanced Expression Of Cxcl16 In The Stallion Reproductive Tract Are Associated With Long-Term Persistence Of Equine Arteritis Virus, Mariano Carossino, Pouya Dini, Theodore S. Kalbfleisch, Alan T. Loynachan, Igor F. Canisso, Kathleen M. Shuck, Peter J. Timoney, R. Frank Cook, Udeni B. R. Balasuriya

Gluck Equine Research Center Faculty Publications

Equine arteritis virus (EAV) can establish long-term persistent infection in the reproductive tract of stallions and is shed in the semen. Previous studies showed that long-term persistence is associated with a specific allele of the CXCL16 gene (CXCL16S) and that persistent infection is maintained despite the presence of a local inflammatory and humoral and mucosal antibody responses. In this study, we demonstrated that equine seminal exosomes (SEs) are enriched in a small subset of microRNAs (miRNAs). Most importantly, we demonstrated that long-term EAV persistence is associated with the downregulation of an SE-associated miRNA (eca-mir-128) and with an enhanced expression of ...


Changes In The Prevalence Of Salmonella Serovars Associated Swine Production And Correlations Of Avian, Bovine And Swine‐Associated Serovars With Human‐Associated Serovars In The United States (1997–2015), Chaohui Yuan, Adam C. Krull, Chong Wang, M. Erdman, P. J. Fedorka-Cray, C. M. Logue, Annette M. O'Connor 2018 Iowa State University

Changes In The Prevalence Of Salmonella Serovars Associated Swine Production And Correlations Of Avian, Bovine And Swine‐Associated Serovars With Human‐Associated Serovars In The United States (1997–2015), Chaohui Yuan, Adam C. Krull, Chong Wang, M. Erdman, P. J. Fedorka-Cray, C. M. Logue, Annette M. O'Connor

Veterinary Diagnostic and Production Animal Medicine Publications

As Salmonella enterica is an important pathogen of food animals, surveillance programmes for S. enterica serovars have existed for many years in the United States. Surveillance programmes serve many purposes, one of which is to evaluate alterations in the prevalence of serovars that may signal changes in the ecology of the target organism. The primary aim of this study was to evaluate changes in the proportion of S. enterica serovars isolated from swine over a near 20‐year observation period (1997–2015) using four longitudinal data sets from different food animal species. The secondary aim was to evaluate correlations between ...


Impact Of Health Challenges On Pig Growth Performance, Carcass Characteristics, And Net Returns Under Commercial Conditions, A. S. Cornelison, L. A. Karriker, N. H. Williams, B. J. Haberl, K. J. Stalder, L. L. Schulz, J. F. Patience 2018 Iowa State University

Impact Of Health Challenges On Pig Growth Performance, Carcass Characteristics, And Net Returns Under Commercial Conditions, A. S. Cornelison, L. A. Karriker, N. H. Williams, B. J. Haberl, K. J. Stalder, L. L. Schulz, J. F. Patience

Animal Science Publications

Understanding how disease affects commercial production is imperative for pig producers to quantify its full impact on pig performance, carcass quality, and net returns. The objective of this experiment was to assess the productivity and economic importance of naturally occurring health challenges (HC) under commercial conditions. Three 1,000 pig grow-finish facilities received 936 pigs each. The experimental period started approximately 34 d post placement at an average start BW of 13.1 ± 0.2 kg. Barns were characterized based on the relative HC, determined by diagnostic assessments as the main characterization tool, along with other health indicators. Barns were ...


An Evaluation Of Pathophysiology And Biomechanics Of Selected Lamenesses In The Horse, Cole Barrett Sandow 2018 Louisiana State University School of Veterinary Medicine

An Evaluation Of Pathophysiology And Biomechanics Of Selected Lamenesses In The Horse, Cole Barrett Sandow

LSU Master's Theses

INTRODUCTION-Laminitis and synovitis are two common causes of equine lameness. Laminitis is most often associated with hyperinsulinemia and osteoarthritis is most commonly the result of synovitis. The objective is to evaluate biomechanical and pathophysiologic events regarding laminitis and synovitis.

MATERIALS AND METHODS-The first study evaluated biomechanical effects of insulin on lamellar strength. For this experiment, lamellar explants were harvested, incubated in media only (serving as a control) or media with a high concentration of insulin for 8 hours. After incubation, structural integrity was evaluated with a mechanical testing device. Data included load to failure (N), stress to failure (MPa), elongation ...


Streptococcus Equi Infections In Horses: Guidelines For Treatment, Control, And Prevention Of Strangles—Revised Consensus Statement, A. G. Boyle, John F. Timoney, J. R. Newton, M. T. Hines, A. S. Waller, B. R. Buchanan 2018 University of Pennsylvania

Streptococcus Equi Infections In Horses: Guidelines For Treatment, Control, And Prevention Of Strangles—Revised Consensus Statement, A. G. Boyle, John F. Timoney, J. R. Newton, M. T. Hines, A. S. Waller, B. R. Buchanan

Gluck Equine Research Center Faculty Publications

This consensus statement update reflects our current published knowledge and opinion about clinical signs, pathogenesis, epidemiology, treatment, complications, and control of strangles. This updated statement emphasizes varying presentations in the context of existing underlying immunity and carrier states of strangles in the transmission of disease. The statement redefines the “gold standard” for detection of possible infection and reviews the new technologies available in polymerase chain reaction diagnosis and serology and their use in outbreak control and prevention. We reiterate the importance of judicious use of antibiotics in horses with strangles. This updated consensus statement reviews current vaccine technology and the ...


A Polyanhydride-Based Implantable Single Dose Vaccine Platform For Long-Term Immunity, Robert G. Schaut, Matt T. Brewer, Kriscelle Mendoza, John K. Jackman, Balaji Narasimhan, Douglas E. Jones 2018 United States Department of Agriculture

A Polyanhydride-Based Implantable Single Dose Vaccine Platform For Long-Term Immunity, Robert G. Schaut, Matt T. Brewer, Kriscelle Mendoza, John K. Jackman, Balaji Narasimhan, Douglas E. Jones

Veterinary Pathology Publications and Papers

Traditionally, immune priming followed by an antigen-boost is utilized for vaccine-induced protective immunity and maintaining long-term immunity often requires repeated exposure to antigen. Here, a novel single dose vaccination platform designed with gonadotropin releasing hormone multiple antigenic peptide as a model antigen is shown.


Detection Of Porcine Reproductive And Respiratory Syndrome Virus (Prrsv)-Specific Igm-Iga In Oral Fluid Samples Reveals Prrsv Infection In The Presence Of Maternal Antibody, Marisa L. Rotolo, Luis Giménez-Lirola, Ju Ji, Ronaldo Magtoto, Yuly A. Henao-Díaz, Chong Wang, David H. Baum, Karen M. Harmon, Rodger G. Main, Jeffrey J. Zimmerman 2018 Iowa State University

Detection Of Porcine Reproductive And Respiratory Syndrome Virus (Prrsv)-Specific Igm-Iga In Oral Fluid Samples Reveals Prrsv Infection In The Presence Of Maternal Antibody, Marisa L. Rotolo, Luis Giménez-Lirola, Ju Ji, Ronaldo Magtoto, Yuly A. Henao-Díaz, Chong Wang, David H. Baum, Karen M. Harmon, Rodger G. Main, Jeffrey J. Zimmerman

Statistics Publications

The ontogeny of PRRSV antibody in oral fluids has been described using isotype-specific ELISAs. Mirroring the serum response, IgM appears in oral fluid by 7 days post inoculation (DPI), IgA after 7 DPI, and IgG by 9 to 10 DPI. Commercial PRRSV ELISAs target the detection of IgG because the higher concentration of IgG relative to other isotypes provides the best diagnostic discrimination. Oral fluids are increasingly used for PRRSV surveillance in commercial herds, but in younger pigs, a positive ELISA result may be due either to maternal antibody or to antibody produced by the pigs in response to infection ...


The Efficacy Of Antibiotic Treatments In Dairy Cows At Dry-Off To Prevent New Intramammary Infections During The Dry-Period Or Clinical Mastitis During Early Lactation: A Protocol For A Systematic Review, Jan M. Sargeant, Charlotte Winder, Annette M. O'Connor, Hannah Wood, Julie M. Glanville, David F. Kelton, Stephen LeBlanc, Todd Duffield 2018 Universty of Guelph

The Efficacy Of Antibiotic Treatments In Dairy Cows At Dry-Off To Prevent New Intramammary Infections During The Dry-Period Or Clinical Mastitis During Early Lactation: A Protocol For A Systematic Review, Jan M. Sargeant, Charlotte Winder, Annette M. O'Connor, Hannah Wood, Julie M. Glanville, David F. Kelton, Stephen Leblanc, Todd Duffield

Veterinary Diagnostic and Production Animal Medicine Reports

Rationale: The majority of antibiotic use in the dairy industry is for the treatment and prevention of intramammary infections (IMI); in the Netherlands, approximately 60 % of all antimicrobial use in dairy is for this purpose, with two-thirds being dry cow therapy (Lam et al., 2012). In the United States, over 90 % of dairy cows receive dry cow therapy after every lactation (USDA-APHIS, 2016), with the goal of treating or preventing IMI during the dry period. These infections are strongly associated with risk of development of clinical mastitis in the first two weeks post-calving, which represents the highest risk period for ...


How Does The Type Of Vaccine Affect Pig Approachability Pre- And Post-Vaccination?, Shawna Weimer, Anna Johnson, Kenneth Stalder, Locke Karriker, Thomas Fangman 2018 Iowa State University

How Does The Type Of Vaccine Affect Pig Approachability Pre- And Post-Vaccination?, Shawna Weimer, Anna Johnson, Kenneth Stalder, Locke Karriker, Thomas Fangman

Animal Industry Report

The objective of this study was to determine if nursery pigs display different behaviors and postures pre- and post-injection using a live- and digital image methodology. A total of 149 pens housing approximately 19 barrows and gilts/pen (a mix of approximately 50% barrows and 50% gilts; 0.3 m2/pig) were used. Barrows and gilts were approximately 6-wk of age from a commercial crossbred genetic line. The pen applied injection treatments were (1) Ingelvac CircoFLEX®/Ingelvac MycoFLEX® vaccine, (2) Circumvent® PCVM vaccine (3) Saline. Pre-injection were conducted at 1600h the day before injections were administered. Pigs received their treatments ...


Evaluation Of How Anesthesia Affect Body Temperature In Sows Using Infrared Thermography, Jennifer English, Anna Johnson, Kenneth Stalder, Locke Karriker, Monique Pairis-Garcia, Caitlyn Bruns 2018 Iowa State University

Evaluation Of How Anesthesia Affect Body Temperature In Sows Using Infrared Thermography, Jennifer English, Anna Johnson, Kenneth Stalder, Locke Karriker, Monique Pairis-Garcia, Caitlyn Bruns

Animal Industry Report

The objective of this experiment was to determine the relationship between rectal temperature and infrared temperature measured on the inner eye, center- and ear base of sows undergoing anesthesia. A total of six sows were used. Sows were anaesthetized using a combination of xylazine, tiletamine HCl and ketamine. Thermal images at the inner ear, ear center and ear base were taken at 10 minute intervals starting ten minutes’ post-anesthetic induction until the sow was able to stand or reached 91.7◦ F body temperature. Rectal temperatures were measured using a digital thermometer. Rectal temperature Pearson correlations were determined among the ...


Novel Resilience Phenotypes From A Natural Disease Challenge Model For Wean-To-Finish Pigs, Austin M. Putz, John C.S. Harding, Michael K. Dyck, Frédéric Fontin, Graham S. Plastow, Jack C. M. Dekkers 2018 Iowa State University

Novel Resilience Phenotypes From A Natural Disease Challenge Model For Wean-To-Finish Pigs, Austin M. Putz, John C.S. Harding, Michael K. Dyck, Frédéric Fontin, Graham S. Plastow, Jack C. M. Dekkers

Animal Industry Report

Novel phenotypes from a commercial testing system could add value to selection for resilience to disease and other stressors beyond simply collecting mortality. Day-to-day variability in feed intake (FI) and in duration at the feeder (DUR), quantified by root mean squared errors (RMSE), were investigated as novel measures of resilience using data from grow-finish pigs in a natural disease challenge facility. • RMSE of FI and DUR were moderately heritable • RMSE of FI and DUR showed moderate to strong genetic correlations with mortality and treatments These results show that day-to-day variation in FI and DUR in a challenge environment can be ...


Digital Commons powered by bepress