Daniel U. Thomson
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View article: The IFPMA IVS seasonal influenza vaccine dose distribution survey 2022–2023: evidence of the need for committed national investment in and uptake of seasonal influenza vaccination
The IFPMA IVS seasonal influenza vaccine dose distribution survey 2022–2023: evidence of the need for committed national investment in and uptake of seasonal influenza vaccination Open
Seasonal influenza vaccines have the potential to prevent significant morbidity and mortality and the World Health Organization recommends that all countries consider implementing seasonal influenza immunization programmes. These provide i…
View article: 190 Zinc supplementation prior to transit and transit duration effects on inflammation and oxidative stress of beef steers
190 Zinc supplementation prior to transit and transit duration effects on inflammation and oxidative stress of beef steers Open
Transportation is unavoidable in the beef industry, yet it is associated with negative performance outcomes during the receiving period. This study investigated the effects of Zn supplementation prior to transit and transit duration on mar…
View article: Isolation of Bacteriophages Lytic to Fusobacterium necrophorum Subspecies necrophorum from Bovine Ruminal Fluid and City Sewage
Isolation of Bacteriophages Lytic to Fusobacterium necrophorum Subspecies necrophorum from Bovine Ruminal Fluid and City Sewage Open
Fusobacterium necrophorum subspecies necrophorum, a resident of the rumen, is the causative agent of bovine liver abscesses. Currently, tylosin, a macrolide, is used in the feed to reduce liver abscesses. Because macrolides are medically i…
View article: A Survey of Iowa Beef x Dairy Calf Raisers and Feedlot Operators to Further Describe Challenges Related to Finishing Beef x Dairy Crossbreds
A Survey of Iowa Beef x Dairy Calf Raisers and Feedlot Operators to Further Describe Challenges Related to Finishing Beef x Dairy Crossbreds Open
The beef on dairy industry has made progress in changing the type and quality of the Beef x Dairy (BXD) crossbred animal, but there is still room for improvement. Information about the conformation and performance of BXD cattle must be sha…
View article: 353 Zinc supplementation prior to transit and transit duration effects on feedlot performance and muscle fatigue of beef steers: Part I – Performance and Muscle Fatigue
353 Zinc supplementation prior to transit and transit duration effects on feedlot performance and muscle fatigue of beef steers: Part I – Performance and Muscle Fatigue Open
This study investigated zinc (Zn) as a mitigation strategy for transit-induced muscle fatigue. Recently weaned Angus-cross steers (n = 80) were stratified by body weight (BW = 265 ± 18.0 kg) to a 2×2 factorial. Dietary (DIET) treatments of…
View article: 354 Zinc supplementation prior to transit and transit duration effects on feedlot performance and muscle fatigue of beef steers: Part II – Feeding Behavior
354 Zinc supplementation prior to transit and transit duration effects on feedlot performance and muscle fatigue of beef steers: Part II – Feeding Behavior Open
This study assessed the effects of supplemental Zn on cattle feeding behavior after varying transit duration. Angus crossbred steers (80; 265 ± 18 kg) were used in a 2 × 2 factorial design. Steers were assigned to a dietary Zn treatment (D…
View article: 328 Assessment of chronically ill or injured feedlot cattle populations at eight United States and nine Canadian feedlots and implications for cattle welfare
328 Assessment of chronically ill or injured feedlot cattle populations at eight United States and nine Canadian feedlots and implications for cattle welfare Open
Cattle health management in the feedlot sector continues to evolve and improve cattle welfare by promoting an understanding of illness and injury to minimize their effects. Many papers have focused on treating individual ill or injured cat…
View article: The welfare of ill and injured feedlot cattle: a review of the literature and implications for managing feedlot hospital and chronic pens
The welfare of ill and injured feedlot cattle: a review of the literature and implications for managing feedlot hospital and chronic pens Open
By definition, ill and injured animals are on the negative valence of animal welfare. For beef cattle kept in feedlot settings, advances in cattle health management have resulted in a greater understanding and prevention of illness and inj…
View article: Animal industry survey: The importance of technical and soft skills, coursework, and extracurricular activities on the success of undergraduates entering animal industries
Animal industry survey: The importance of technical and soft skills, coursework, and extracurricular activities on the success of undergraduates entering animal industries Open
A survey instrument was developed to inquire about the skills and experiences needed to be successful in an entry-level position within an animal industry. The instrument called upon industry representatives to rank the importance of skill…
View article: Quality of Plant-Based Ground Beef Alternatives in Comparison with Ground Beef of Various Fat Levels
Quality of Plant-Based Ground Beef Alternatives in Comparison with Ground Beef of Various Fat Levels Open
The objective of this study was to compare the quality characteristics of current plant-based protein ground beef alternatives (GBA) to ground beef (GB) patties of varying fat percentages. Fifteen different production lots (n = 15/fat leve…
View article: Effects of guanidinoacetic acid supplementation on nitrogen retention and methionine flux in cattle
Effects of guanidinoacetic acid supplementation on nitrogen retention and methionine flux in cattle Open
Creatine stores high-energy phosphate bonds in muscle and is synthesized in the liver through methylation of guanidinoacetic acid (GAA). Supplementation of GAA may therefore increase methyl group requirements, and this may affect methyl gr…
View article: Antimicrobial Activity of Sorghum Phenolic Extract on Bovine Foodborne and Mastitis-Causing Pathogens
Antimicrobial Activity of Sorghum Phenolic Extract on Bovine Foodborne and Mastitis-Causing Pathogens Open
Antimicrobial resistance in bacterial pathogens associated with bovine mastitis and human foodborne illnesses from contaminated food and water have an impact on animal and human health. Phenolic compounds have antimicrobial properties and …
View article: Limit-Fed, High-Energy Diets Can Achieve Improved Feed Conversion Rates Without Compromising Rate of Gain When Compared to Conventional High Roughage Diets
Limit-Fed, High-Energy Diets Can Achieve Improved Feed Conversion Rates Without Compromising Rate of Gain When Compared to Conventional High Roughage Diets Open
Objective:Compare and determine the effects on animal performance between a conventional high roughage diet and a limit-fed, high energy diet during the receiving and growing phase.\nStudy Description:Crossbred heifer calves (n = 418) orig…
View article: Subsequent Carcass Merit of Feedlot Cattle May Be Improved by Limit Feeding a High-Energy Diet During the Backgrounding Phase
Subsequent Carcass Merit of Feedlot Cattle May Be Improved by Limit Feeding a High-Energy Diet During the Backgrounding Phase Open
Objective:Determine and analyze the impact of limit feeding a high-energy diet in the backgrounding phase, primarily based on dry-rolled corn and Sweet Bran (Cargill Animal Nutrition, Blair, NE), on animal performance in the finishing phas…
View article: Alternative feed additive strategies to reduce antimicrobial use in finishing cattle
Alternative feed additive strategies to reduce antimicrobial use in finishing cattle Open
With the onset of the Veterinary Feed Directive, there is a need to evaluate the current strategies used for the control of liver abscesses as well as coccidia species (Eimeria bovis & Eimeria zuernii) in the feedlot cattle. Additionally, …
View article: Raising Animals Without Antibiotics: U.S. Producer and Veterinarian Experiences and Opinions
Raising Animals Without Antibiotics: U.S. Producer and Veterinarian Experiences and Opinions Open
Ensuring the safety, health, and overall well-being of animals raised for food is both an ethical obligation and a critical component of providing safe food products. The use of antibiotics for maintaining animal health has come under scru…
View article: effects of handling intensity at time of processing on physiological response, immune response, and vaccination status in beef cattle at the feedlot
effects of handling intensity at time of processing on physiological response, immune response, and vaccination status in beef cattle at the feedlot Open
Newly received feeder calves are often experience stress upon arrival at the feedlot due to weaning, commingling, transportation, marketing, nutrition, handling and others. Many of these factors are out of the control of the feedlot receiv…
View article: 37 Carry-over effects of health management through the production chain
37 Carry-over effects of health management through the production chain Open
The beef supply chain has many segments for live animals and beef products. Live cattle are sold from the ranch to the stocker to the feedlot and then to the packer. Animals get sick due to an overwhelming exposure to a pathogen or a suppr…
View article: Raising animals without antibiotics: producer and veterinarian experiences and opinions
Raising animals without antibiotics: producer and veterinarian experiences and opinions Open
Ensuring the safety, health, and overall well-being of animals raised for food is both an ethical obligation and a critical component of providing safe food products. The use of antibiotics for maintaining animal health has come under scru…
An epidemiological investigation to determine the prevalence and clinical manifestations of slow-moving finished cattle presented to slaughter facilities1 Open
Cattle mobility is routinely measured at commercial slaughter facilities. However, the clinical signs and underlying causes of impaired mobility of cattle presented to slaughter facilities are poorly defined. As such, the objectives of thi…
View article: Intercontinental survey of commercial abattoirs
Intercontinental survey of commercial abattoirs Open
A survey was conducted to describe the distribution of 10 advanced health and welfare conditions in cows destined for slaughter within a large, multinational beef supply chain. The survey included 4,211 groups of cows (N = 76,886) from 13 …
View article: Molecular detection and characterization of transient bovine viral diarrhea virus (BVDV) infections in cattle commingled with ten BVDV persistently infected cattle
Molecular detection and characterization of transient bovine viral diarrhea virus (BVDV) infections in cattle commingled with ten BVDV persistently infected cattle Open
Fifty-three cattle of unknown serologic status that were not persistently infected (PI) with bovine viral diarrhea virus (BVDV) were commingled with 10 cattle that were PI with different strains of BVDV, and were monitored for an extended …
View article: Review: Effects of Ractopamine Hydrochloride (Paylean) on welfare indicators for market weight pigs1
Review: Effects of Ractopamine Hydrochloride (Paylean) on welfare indicators for market weight pigs1 Open
This review summarizes the effects of ractopamine hydrochloride (RAC) dose (5, 7.5, 10, and 20 mg/kg) on market weight pig welfare indicators. Ractopamine hydrochloride (trade name Paylean) is a β-adrenergic agonist that was initially appr…
View article: Assessment of risk factors contributing to carcass bruising in fed cattle at commercial slaughter facilities
Assessment of risk factors contributing to carcass bruising in fed cattle at commercial slaughter facilities Open
Cattle injuries can occur during transportation due to vehicle design, transport conditions, and loading or unloading procedures and lead to carcass bruising and economic loss due to decreased carcass value. The objectives of this study we…
View article: A survey of recommended practices made by veterinary practitioners to cow-calf operations in the United States and Canada
A survey of recommended practices made by veterinary practitioners to cow-calf operations in the United States and Canada Open
Practicing veterinarians (n = 148) who service commercial beef cow-calf herds responded to a survey describing general recommendations made to their clients in terms of vaccine protocol, health, and production practices. Responding veterin…
View article: composition study of a targeted sampling of Ixodidae family ticks and their pathogen status throughout the Flint Hills region of Kansas
composition study of a targeted sampling of Ixodidae family ticks and their pathogen status throughout the Flint Hills region of Kansas Open
Bovine anaplasmosis is an economically significant disease of cattle concerning the producers and veterinary practitioners of the state of Kansas as well as the rest of the United States. Its transmission by iatrogenic vectors has been wel…
View article: accuracy of field diagnosis and key diagnostic findings in feedlot cattle diagnosed with acute interstitial pneumonia in southwest Kansas at the time of necropsy
accuracy of field diagnosis and key diagnostic findings in feedlot cattle diagnosed with acute interstitial pneumonia in southwest Kansas at the time of necropsy Open
Acute interstitial pneumonia (AIP) is a non-infectious respiratory disease that affects the beef cattle industry and has been identified as one of the costliest diseases affecting feedlot cattle. Causative agents of AIP have been identifie…
View article: Effects of liver abscess severity and quality grade on meat tenderness and sensory attributes in commercially finished beef cattle fed without tylosin phosphate1
Effects of liver abscess severity and quality grade on meat tenderness and sensory attributes in commercially finished beef cattle fed without tylosin phosphate1 Open
Strip loin steaks (n = 119) were used to evaluate the association between liver abscess severity and USDA quality grade and meat tenderness and sensory attributes of steaks from finished feedlot cattle. Steaks were used in a 3 × 2 factoria…
View article: Effects of ractopamine hydrochloride on growth performance, carcass characteristics, and physiological response to different handling techniques1,2
Effects of ractopamine hydrochloride on growth performance, carcass characteristics, and physiological response to different handling techniques1,2 Open
Feedlot cattle ( = 128; BW = 549 ± 60 kg) were used to evaluate the effects of ractopamine hydrochloride (RAC) on growth performance, physiological response to handling, and mobility during shipment for slaughter in a study utilizing a spl…