Kendall L Samuelson
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View article: PSV-18 High dietary starch and erratic feed management impact ruminal and colonic health and pathogenic bacteria prevalence and concentration in the gastrointestinal tract and liver of feedlot steers.
PSV-18 High dietary starch and erratic feed management impact ruminal and colonic health and pathogenic bacteria prevalence and concentration in the gastrointestinal tract and liver of feedlot steers. Open
Investigating the relationships between feedlot management practices, gastrointestinal health, and bacterial pathogen load is crucial for understanding liver abscess development. This study evaluated the effects of dietary starch concentra…
View article: 284 Nutrient density on arrival and phase-feeding effects on economic returns of feedlot cattle.
284 Nutrient density on arrival and phase-feeding effects on economic returns of feedlot cattle. Open
The feedlot industry is an evolving system that continues to innovate and adapt based on market supply and demand. In recent years, the shift in favor of carcass-based marketing has led to increased days on feed in an effort to increase ho…
View article: Quantification of major bacterial pathogens in liver abscesses and matched ruminal and colonic epithelial tissues of feedlot cattle
Quantification of major bacterial pathogens in liver abscesses and matched ruminal and colonic epithelial tissues of feedlot cattle Open
Liver abscesses (LA) in cattle are a polymicrobial infection, and the major bacterial pathogens associated are as follows: Fusobacterium necrophorum subsp. necrophorum (FNN), F. necrophorum subsp. funduliforme (FNF), Trueperella pyogenes (…
View article: Investigating the effects of dietary and management modifications on <i>Salmonella enterica</i> population in harvest-ready beef cattle
Investigating the effects of dietary and management modifications on <i>Salmonella enterica</i> population in harvest-ready beef cattle Open
Salmonella enterica , a foodborne pathogen, poses a significant public health risk, particularly because of multidrug-resistant strains. Cattle are one of the known reservoirs of Salmonella that contaminates beef products. Whereas antibiot…
View article: Evaluation of gastrointestinal and fecal microbial communities as markers of liver abscess risk in beef feedlot cattle
Evaluation of gastrointestinal and fecal microbial communities as markers of liver abscess risk in beef feedlot cattle Open
Liver abscesses (LAs) are a prevalent and costly issue in the beef industry. Microbial translocation from the gastrointestinal tract is believed to be the underlying cause of LAs. However, little is understood about the factors that permit…
View article: 475 Effects of diet composition and feed delivery regimen on growth performance, rumen buffering characteristics, carcass outcomes, and liver abscess prevalence of finishing steers
475 Effects of diet composition and feed delivery regimen on growth performance, rumen buffering characteristics, carcass outcomes, and liver abscess prevalence of finishing steers Open
Liver abscesses present significant challenges for the beef industry, yet understanding of the interplay between diet composition, eating behavior, and ruminal acidosis in finishing cattle and their effects on liver abscess prevalence and …
View article: Effects of dietary composition and feeding management regimen on liver abscess prevalence, growth performance, and carcass outcomes of feedlot steers*
Effects of dietary composition and feeding management regimen on liver abscess prevalence, growth performance, and carcass outcomes of feedlot steers* Open
We investigated the independent and in- teractive effects of dietary starch concentration and feed- ing management regimen on growth performance, carcass characteristics, and prevalence of liver abscesses in finish- ing beef cattle. Beef s…
View article: Effects of protein concentration and beta-adrenergic agonists on ruminal bacterial communities in finishing beef heifers
Effects of protein concentration and beta-adrenergic agonists on ruminal bacterial communities in finishing beef heifers Open
To improve animal performance and modify growth by increasing lean tissue accretion, beef cattle production has relied on use of growth promoting technologies such as beta-adrenergic agonists. These synthetic catecholamines, combined with …
View article: Effects of starch dilution with corn stalks or wet distillers grains with solubles on growth performance and carcass characteristics of feedlot steers
Effects of starch dilution with corn stalks or wet distillers grains with solubles on growth performance and carcass characteristics of feedlot steers Open
This study evaluated the effects of starch dilution with different sources of dietary fiber from terminal implant to slaughter on growth performance, energy utilization, and carcass characteristics of feedlot cattle. Steers (n = 416; initi…
View article: Corticotropin-releasing hormone and vasopressin challenge affects metabolic, hematologic, and rumen fermentation parameters of growing beef steers
Corticotropin-releasing hormone and vasopressin challenge affects metabolic, hematologic, and rumen fermentation parameters of growing beef steers Open
The objective of this study was to evaluate the impacts of stress challenge duration on metabolic, hematologic, and rumen fermentation parameters of beef steers. Thirty steers (416 ± 19 kg) were used in a randomized complete block design w…
View article: 401 Dietary Starch Dilution Strategies to Improve Feedlot Cattle Performance and Rumen Health
401 Dietary Starch Dilution Strategies to Improve Feedlot Cattle Performance and Rumen Health Open
This study evaluated starch dilution with different sources of fiber from terminal implant to harvest on feedlot cattle performance, rumen buffering characteristics, and carcass outcomes. Steers (n = 416) were allocated to 48 pens in a ran…
View article: A Longitudinal Study on the Dynamics of Salmonella enterica Prevalence and Serovar Composition in Beef Cattle Feces and Lymph Nodes and Potential Contributing Sources from the Feedlot Environment
A Longitudinal Study on the Dynamics of Salmonella enterica Prevalence and Serovar Composition in Beef Cattle Feces and Lymph Nodes and Potential Contributing Sources from the Feedlot Environment Open
Salmonella contamination of beef products, specifically from the incorporation of bovine lymph nodes into ground beef, remains a food safety concern. Current postharvest Salmonella mitigation techniques do not address Salmonella bacteria t…
View article: Impacts of including Sweet Bran and wet distillers grains with solubles alone or in combination in finishing cattle diets on physically effective fiber concentrations and rumen buffering characteristics of feedlot cattle
Impacts of including Sweet Bran and wet distillers grains with solubles alone or in combination in finishing cattle diets on physically effective fiber concentrations and rumen buffering characteristics of feedlot cattle Open
This study evaluated the effects of Sweet Bran (SB) and wet distillers grains with solubles (WDGS) in the diet alone or in combination on physically effective neutral detergent fiber (peNDF), ruminal pH, and rumination behavior of finishin…
View article: Feeding a high-energy finishing diet upon arrival to high-risk feedlot calves: effects on health, performance, ruminal pH, rumination, serum metabolites, and carcass traits
Feeding a high-energy finishing diet upon arrival to high-risk feedlot calves: effects on health, performance, ruminal pH, rumination, serum metabolites, and carcass traits Open
This study evaluated the impacts of feeding a high-energy finishing diet during both the receiving and finishing period compared with a lower-energy receiving diet with adaptation to the finishing diet on health, performance, serum chemist…
View article: 18 Effects of Protein Concentration, Degradability, and Beta-adrenergic Agonists on Ruminal Microbial Communities in Finishing Heifers
18 Effects of Protein Concentration, Degradability, and Beta-adrenergic Agonists on Ruminal Microbial Communities in Finishing Heifers Open
To improve animal performance and modify growth by increasing lean tissue accretion, beef cattle production has relied on use of growth promoting technologies such as beta-adrenergic agonists. These synthetic catecholamines, combined with …
View article: Effects of changes in finishing diets and growth technologies on animal growth performance and the carbon footprint of cattle feeding: 1990 to 2020
Effects of changes in finishing diets and growth technologies on animal growth performance and the carbon footprint of cattle feeding: 1990 to 2020 Open
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View article: PSV-12 The impact of modern diets and growth technologies on animal growth performance and the carbon footprint of cattle feeding
PSV-12 The impact of modern diets and growth technologies on animal growth performance and the carbon footprint of cattle feeding Open
Both dietary ingredients and technology used in the feedlot cattle industry have evolved in the past 30 years. As consumer concern for the sustainability of the feedlot cattle production increases, it is important to understand how product…
View article: 95 Effects of Three Implant Programs on Growth Performance, Carcass Outcomes, and Weekly Activity Minutes of Finishing Steers Fed Different Days on Feed
95 Effects of Three Implant Programs on Growth Performance, Carcass Outcomes, and Weekly Activity Minutes of Finishing Steers Fed Different Days on Feed Open
This study evaluated the effects of a single slow-release implant compared to two re-implant programs administered at either 120 days on feed (DOF) or 80 days from harvest on performance, carcass characteristics, and activity of serially h…
View article: Comparative efficacy of metaphylaxis with tulathromycin and pentavalent modified-live virus vaccination in high-risk, newly received feedlot cattle
Comparative efficacy of metaphylaxis with tulathromycin and pentavalent modified-live virus vaccination in high-risk, newly received feedlot cattle Open
Our objective was to compare metaphylaxis with tulathromycin (META) and vaccination with a pentavalent modified-live virus respiratory vaccine (MLV) in high-risk feedlot calves and their influence on health and growth performance during a …
View article: 199 Inclusion of Sweet Bran™ and wet distillers grains alone or in combination improves performance, carcass merit, and rumen buffering characteristics of feedlot cattle fed steam-flaked corn diets
199 Inclusion of Sweet Bran™ and wet distillers grains alone or in combination improves performance, carcass merit, and rumen buffering characteristics of feedlot cattle fed steam-flaked corn diets Open
This study evaluated the effects of Sweet Bran™ (SB) and/or wet distillers grains with solubles (WDGS) in the diet alone or in combination on performance, carcass characteristics, ruminal pH, and rumination of finishing beef cattle. Steers…
View article: PSI-13 Evaluation of acid insoluble ash as a digestibility marker in feedlot diets containing corn-milling byproducts
PSI-13 Evaluation of acid insoluble ash as a digestibility marker in feedlot diets containing corn-milling byproducts Open
We evaluated the accuracy of acid insoluble ash (AIA) as a digestibility marker in feedlot cattle diets containing corn-milling byproducts and examined the effect of fecal sampling frequency on digestibility estimates. Steers (n = 6) were …
View article: Effects of Bacillus subtilis PB6 and/or chromium propionate supplementation on serum chemistry, complete blood count, and fecal Salmonella spp. count in high-risk cattle during the feedlot receiving and finishing periods1,2
Effects of Bacillus subtilis PB6 and/or chromium propionate supplementation on serum chemistry, complete blood count, and fecal Salmonella spp. count in high-risk cattle during the feedlot receiving and finishing periods1,2 Open
The study objective was to determine the effects of Bacillus subtilis PB6 and/or chromium propionate supplementation on serum chemistry, complete blood count, and fecal Salmonella spp. count in high-risk beef cattle during a 56-d feedlot r…
View article: Effects of Bacillus subtilis PB6 and/or chromium propionate supplementation on clinical health, growth performance, and carcass traits of high-risk cattle during the feedlot receiving and finishing periods1
Effects of Bacillus subtilis PB6 and/or chromium propionate supplementation on clinical health, growth performance, and carcass traits of high-risk cattle during the feedlot receiving and finishing periods1 Open
The study objective was to determine the effects of Bacillus subtilis PB6 and/or chromium propionate supplementation on health, growth performance, and carcass characteristics of high-risk beef cattle during a 56-d feedlot receiving period…
View article: 296 Effects of corticotropin-releasing hormone (CRH) and vasopressin (VP) challenge duration on complete blood count and serum metabolites of growing beef cattle
296 Effects of corticotropin-releasing hormone (CRH) and vasopressin (VP) challenge duration on complete blood count and serum metabolites of growing beef cattle Open
The objective was to evaluate stress challenge and duration on immunologic and metabolic variables of growing beef cattle. Thirty crossbred steers were used in a randomized complete block design. Treatments were i.v. injection of: 1) Contr…
View article: PSIV-15 Effects of Bacillus subtilis PB6 and/or chromium propionate supplementation on health, performance, and blood parameters of high-risk cattle during the feedlot receiving period
PSIV-15 Effects of Bacillus subtilis PB6 and/or chromium propionate supplementation on health, performance, and blood parameters of high-risk cattle during the feedlot receiving period Open
The objective was to determine the effects of Bacillus subtilis PB6 and/or chromium propionate supplementation on health, performance, and blood parameters in high-risk beef calves during a 56-day receiving period. Four truckload blocks of…
View article: 3 Administration of a DNA immunostimulant does not mitigate bovine herpesvirus-1 recrudescence in dexamethasone challenged beef cattle
3 Administration of a DNA immunostimulant does not mitigate bovine herpesvirus-1 recrudescence in dexamethasone challenged beef cattle Open
The study objective was to determine the effect of a DNA immunostimulant on recrudescence of bovine herpesvirus-1 (BHV-1) after dexamethasone challenge in beef cattle. It was hypothesized that the DNA immunostimulant would mitigate stress-…
View article: 104 Administration of a DNA immunostimulant does not mitigate bovine herpesvirus-1 recrudescence in dexamethasone challenged beef cattle
104 Administration of a DNA immunostimulant does not mitigate bovine herpesvirus-1 recrudescence in dexamethasone challenged beef cattle Open
The study objective was to determine the effect of a DNA immunostimulant on recrudescence of bovine herpesvirus-1 (BHV-1) after dexamethasone challenge in beef cattle. It was hypothesized that the DNA immunostimulant would mitigate stress-…
View article: BEEF SPECIES–RUMINANT NUTRITION CACTUS BEEF SYMPOSIUM: Energy and roughage levels in cattle receiving diets and impacts on health, performance, and immune responses1
BEEF SPECIES–RUMINANT NUTRITION CACTUS BEEF SYMPOSIUM: Energy and roughage levels in cattle receiving diets and impacts on health, performance, and immune responses1 Open
Transition of newly received feedlot cattle from a forage- to grain-based diet is challenging, and the appropriate roughage level in receiving diets is debatable. Nutritionists must consider the paradox of dietary transition and roughage l…
View article: Oral hydration therapy with water and bovine respiratory disease incidence affects rumination behavior, rumen pH, and rumen temperature in high-risk, newly received beef calves
Oral hydration therapy with water and bovine respiratory disease incidence affects rumination behavior, rumen pH, and rumen temperature in high-risk, newly received beef calves Open
The study objectives were to determine the effect of oral hydration therapy and bovine respiratory disease (BRD) on rumination behavior, rumen pH, and rumen temperature. A random subset of high-risk, auction-sourced bulls from 3 truckload …