Article
Veterinary Sciences
Ashley Egyedy, Eduardo Barahona Rosales, Burim N. Ametaj
Summary: This study found a link between udder infection in dairy cows before drying off and the incidence of several postpartum diseases. Udder infection caused an increase in somatic cell count in milk, and high somatic cell count was associated with a higher risk of ketosis, retained placenta, uterine infection, and lameness after calving. Udder inflammation also led to lower milk yield and concentrations of milk sugar and protein.
VETERINARY SCIENCES
(2022)
Article
Agriculture, Dairy & Animal Science
R. Rearte, S. G. Corva, R. L. de la Sota, I. M. Lacau-Mengido, M. J. Giuliodori
Summary: Poor udder health status has a negative impact on milk yield and reproductive performance in dairy cows. This study found that somatic cell count (SCC) is negatively associated with daily milk yield and the odds for conception in grazing dairy cows.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
C. Clabby, A. Valldecabres, P. Dillon, S. McParland, S. Arkins, K. O'Sullivan, J. Flynn, J. Murphy, P. Silva Bolona
Summary: This observational study aimed to explore the association between milk somatic cell count (SCC) and subclinical intramammary infection (IMI) and determine the optimal SCC cut-point for diagnosing IMI. The study found that in Irish pasture-based dairy herds with low bulk tank SCC, the last test-day SCC was the best predictor of IMI in late lactation.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Genetics & Heredity
Daniela Elena Ilie, Alexandru Eugeniu Mizeranschi, Ciprian Valentin Mihali, Radu Ionel Neam, George Vlad Goilean, Ovidiu Ionut Georgescu, Daniela Zaharie, Mihai Carabas, Ioan Hutu
Summary: This study conducted the first GWAS for somatic cell score (SCS) in Romanian dairy cattle breeds, identifying one significant SNP associated with SCS and 40 suggestive SNPs. The results contribute to expanding the knowledge on genetic variability explained by SNPs for SCS in dairy cattle.
Article
Agriculture, Dairy & Animal Science
Mohammed A. Hachemi, Jessica R. Sexton, Mickael Briens, Nancy L. Whitehouse
Summary: This study aims to determine the amount of selenium transferred to milk and blood of dairy cows when fed with hydroxy-selenomethionine (OH-SeMet) compared to unsupplemented and seleno-yeast (SY) groups. The results showed that organic selenium supplementation increased selenium concentrations in milk and plasma, and OH-SeMet was more effective than SY in improving milk quality.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
Sara Agnes Nagy, Oz Kilim, Istvan Csabai, Gyorgy Gabor, Norbert Solymosi
Summary: Body condition scoring of dairy cattle is crucial but time-consuming. This study explores the use of computer vision-based deep learning to automate the scoring process. Trained neural networks achieved similar or better results compared to expert scoring, and the pretrained models are freely available for further research.
Article
Agriculture, Dairy & Animal Science
Kehan Sheng, Borbala Foris, Marina A. G. von Keyserlingk, John Gardenier, Cameron Clark, Daniel M. Weary
Summary: Lameness assessments are usually not conducted frequently on dairy farms, resulting in underestimation of lameness prevalence. A remote comparative assessment method was developed and tested, which involved nonexperienced workers watching videos of cows walking and determining which cow was more lame and by how much. This method provides a fast and cost-effective way to assess lameness and can be useful for large-scale data collection.
JOURNAL OF DAIRY SCIENCE
(2023)
Review
Veterinary Sciences
Sabine Farschtschi, Martin Mattes, Michael W. Pfaffl
Summary: A key challenge of the 21st century is to provide the growing world population with sustainable and secure food supply. Dairy farming's primary task is to reduce milk losses and inefficiencies associated with diseased cows. Differential cell counting has the potential to optimize mastitis diagnostics and monitor the overall health status of dairy cows.
VETERINARY SCIENCES
(2022)
Article
Veterinary Sciences
Daniel Schwarz, Sonja Kleinhans, Gesine Reimann, Peter Stueckler, Franz Reith, Kaivo Ilves, Kalle Pedastsaar, Lei Yan, Zhen Zhang, Roberto Lorenzana, Marisa Luisa Barreal, Ramiro Fouz
Summary: The study aims to investigate the extent to which UHG aids in determining different statuses of cows, revealing that cows in groups C and D are more likely to leave herds, while cows in group B are more likely to have 200,000 cells/mL at the next test day.
PREVENTIVE VETERINARY MEDICINE
(2021)
Article
Veterinary Sciences
Shebl E. Salem, Ayman Mesalam, Ahmed Monir
Summary: This study investigated the prevalence of lameness and digital dermatitis (DD) in dairy cattle herds in Egypt. It found that lameness was highly prevalent, while DD had lower prevalence but high herd-level prevalence. Poor cow hygiene was also noticeable. Measures to reduce the prevalence of lameness and improve cow hygiene in Egyptian dairy cattle herds are needed.
BMC VETERINARY RESEARCH
(2023)
Article
Agriculture, Dairy & Animal Science
Lisa Rienesl, Negar Khayatzdadeh, Astrid Koeck, Christa Egger-Danner, Nicolas Gengler, Clement Grelet, Laura Monica Dale, Andreas Werner, Franz-Josef Auer, Julie Leblois, Johann Soelkner
Summary: Mid-infrared spectroscopy has the potential to predict clinical mastitis in dairy cows and can be used as a supplementary tool for mastitis monitoring and the genetic evaluation of udder health.
Article
Immunology
Lu-Yi Jiang, Hui-Zeng Sun, Ruo-Wei Guan, Fushan Shi, Feng-Qi Zhao, Jian-Xin Liu
Summary: The study analyzed the functions of blood neutrophils in transition cows and their association with postpartum mastitis risk. The results showed that the serum concentration of NETs was significantly higher in cows with high SCCs compared to cows with low SCCs. Transcriptomic analysis revealed transcriptome differences in neutrophils between high- and low-SCC cows mainly in cell cycle-related pathways.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Agriculture, Dairy & Animal Science
Peter Plate, Steven van Winden
Summary: Selective dry cow therapy involves targeted treatment for infected cows and using teat sealant for uninfected cows. Training farmers and veterinary students in hygienic application is important to prevent infections. This study shows that drying off cows by students under supervision does not negatively affect mastitis outcomes and can even lower the risk of culling within twelve months.
Article
Agriculture, Dairy & Animal Science
B. Krattley-Roodenburg, L. J. Huybens, M. Nielen, T. van Werven
Summary: The study aimed to investigate the effects of different management practices on udder health during the dry period, and found that factors such as reducing milk yield before dry-off, correct use of antimicrobials, and adherence to guidelines can help reduce the risk of new high SCC. The research also showed that farmers can balance limited use of antimicrobials at dry-off with management measures to maintain good udder health during the dry period.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Wenxiang Shen, Xiaoyu Ma, Dan Shao, Xiaohu Wu, Shengyi Wang, Juanshan Zheng, Yanan Lv, Xuezhi Ding, Baohua Ma, Zuoting Yan
Summary: The study found that neutrophil extracellular traps (NETs) are involved in bovine endometrial epithelial cell (BEEC) pyroptosis during endometritis in dairy cows.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Agriculture, Dairy & Animal Science
G. A. Oliveira Junior, F. S. Schenkel, L. Alcantara, K. Houlahan, C. Lynch, C. F. Baes
Summary: Genetic improvement is critical in meeting the growing demand for high quality, sustainable dairy products. This study estimated genetic parameters and trends for 67 traits in Canadian Holstein cows, revealing high heritability for fat percent and protein percent, and low heritabilities for disease-related traits. Some traits showed strong genetic correlations between heifers and cows, while others were genetically unrelated.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
D. J. Seymour, A. Canovas, T. C. S. Chud, J. P. Cant, V. R. Osborne, C. F. Baes, F. S. Schenkel, F. Miglior
Summary: Ruminants, such as dairy cattle, have the ability to utilize cellulose as an energy source to convert plant material into high-quality protein sources like milk. This has led to a renewed interest in feed efficiency research in dairy cattle, with a focus on utilizing selective breeding and genetics to improve this trait.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
A. M. L. Madureira, T. A. Burnett, J. C. S. Marques, A. L. Moore, S. Borchardt, W. Heuwieser, T. G. Guida, J. L. M. Vasconcelos, C. F. Baes, R. L. A. Cerri
Summary: The occurrence and intensity of estrous expression were found to be associated with pregnancy success in lactating dairy cows subjected to embryo transfer. Estrous expression before ET and strong intensity of estrus were both linked to higher pregnancy rates per ET. Additionally, the stage of embryo development also played a role in pregnancy success, with cows receiving early blastocysts having higher fertility rates.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
E. A. Abdalla, B. O. Makanjuola, N. van Staaveren, B. J. Wood, C. F. Baes
Summary: This study estimated the genetic parameters for pendulous crop (PC) in turkeys and found that it is heritable and genetically correlated with certain production traits. The use of genomic information improved the accuracy of predicting breeding values for selection candidates.
Article
Agriculture, Dairy & Animal Science
Ryley J. Vanderhout, Emily M. Leishman, Heather Hiscock, Emhimad A. Abdalla, Bayode O. Makanjuola, Jeff Mohr, Alexandra Harlander-Matauschek, Shai Barbut, Benjamin J. Wood, Christine F. Baes, Nienke van Staaveren
Summary: White striping, a recent issue in the turkey industry, affects meat quality and economic value. A study found 88% of turkeys have white striping, with severity related to weight and meat yield. Evaluation of white striping in turkey genetic selection programs is needed for future research.
Article
Veterinary Sciences
Emily M. Leishman, Ryley J. Vanderhout, Nienke van Staaveren, Shai Barbut, Jeff Mohr, Benjamin J. Wood, Christine F. Baes
Summary: This study evaluated post mortem activity in turkeys during slaughter and analyzed the effects of activity, genetic line, and season on meat quality traits. The results showed that post mortem activity influenced color, drip loss, and shear force, while genetic line and season had significant effects on various meat quality traits.
FRONTIERS IN VETERINARY SCIENCE
(2022)
Article
Veterinary Sciences
Emily M. Leishman, Nienke van Staaveren, Vern R. Osborne, Benjamin J. Wood, Christine F. Baes, Alexandra Harlander-Matauschek
Summary: Injurious pecking is a significant welfare and economic issue in turkey production. This study investigated the risk factors for integument injuries in Canadian turkey flocks through a survey and analysis. The results showed that flock age and sex were associated with different types of pecking injuries. Aggressive pecking injuries appeared to be influenced by human interaction, while feather pecking injuries were related to litter condition and the management of sick birds. Future research should focus on these factors to better understand their relationship with the prevalence and severity of these conditions.
FRONTIERS IN VETERINARY SCIENCE
(2022)
Editorial Material
Agriculture, Dairy & Animal Science
Joana G. P. Jacinto, Irene M. Hafliger, Christine F. Baes, Hinayah R. de Oliveira, Cord Drogemuller
Article
Agriculture, Dairy & Animal Science
I. L. Campos, T. C. S. Chud, H. R. Oliveira, C. F. Baes, A. Canovas, F. S. Schenkel
Summary: Heat stress poses a challenge to the Canadian dairy industry, and this study examines the impact of heat load on milk production traits in Canadian Holstein cows. The research finds that milk components, such as fat and protein yield, are more sensitive to heat stress. The estimated annual economic losses due to heat stress amount to approximately $34.5 million.
CANADIAN JOURNAL OF ANIMAL SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
Erin Massender, Luiz F. Brito, Laurence Maignel, Hinayah R. Oliveira, Mohsen Jafarikia, Christine F. Baes, Brian Sullivan, Flavio S. Schenkel
Summary: This study aimed to evaluate the potential benefits of single-step genomic evaluations for conformation traits in Canadian Alpine and Saanen dairy goats, and investigate the effect of using single- and multiple-breed training populations. The results showed that multiple-breed analyses increased validation accuracy for Saanen and reduced bias of genomically enhanced breeding values. However, the use of genomically enhanced breeding values did not provide significant benefits compared to pedigree-based breeding values in terms of validation accuracy and bias.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
Erin Massender, Luiz F. Brito, Laurence Maignel, Hinayah R. Oliveira, Mohsen Jafarikia, Christine F. Baes, Brian Sullivan, Flavio S. Schenkel
Summary: The study investigated the use of the single-step genomic BLUP method to predict genomic breeding values for milk production traits in Canadian Alpine and Saanen dairy goats. The forward cross-validation approach resulted in similar validation accuracies and biases across traits.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Multidisciplinary Sciences
Emhimad A. E. Abdalla, Bayode O. Makanjuola, Benjamin J. Wood, Christine F. Baes
Summary: The study conducted a GWAS on turkey population and identified candidate genomic regions and genes associated with 18-week body weight. Many of the investigated genes are known to be involved in growth and body weight.
Article
Genetics & Heredity
Ryley J. J. Vanderhout, Emily M. M. Leishman, Emhimad A. A. Abdalla, Shai Barbut, Benjamin J. J. Wood, Christine F. F. Baes
Summary: In this study, genetic parameters for meat quality traits and their correlations with body weight and meat yield were estimated in a population of purebred male turkeys. The results showed that meat quality traits have moderate heritability and unfavorable genetic correlations with body weight and meat yield.
FRONTIERS IN GENETICS
(2022)
Article
Agriculture, Dairy & Animal Science
Ivan L. Campos, Tatiane C. S. Chud, Gerson A. Oliveira, Christine F. Baes, Angela Canovas, Flavio S. Schenkel
Summary: This study estimated the genetic parameters for heat tolerance of milk, fat, and protein yields in Canadian Holstein cows. The results showed an antagonistic relationship between production level and heat tolerance, but the correlation was moderate, indicating the possibility of selecting animals with high genetic merit for production and heat tolerance.
Article
Agriculture, Dairy & Animal Science
Stephanie Kamalanathan, Kerry Houlahan, Filippo Miglior, Tatiane C. S. Chud, Dave J. Seymour, Dagnachew Hailemariam, Graham Plastow, Hinayah R. de Oliveira, Christine F. Baes, Flavio S. Schenkel
Summary: Dairy cows contribute to greenhouse gas emissions from livestock, and strategies involving genetics and breeding can be used to reduce methane emissions. This study assessed three definitions for methane emission traits and their genetic parameters in Holstein cattle. The heritability of daily methane production, methane yield, and methane intensity was estimated, and a high genetic correlation was found between daily methane production and methane intensity. This study suggests that genetic selection can potentially mitigate methane emissions in Holstein cattle.
