Article
Agriculture, Dairy & Animal Science
P. Maentysaari, J. Juga, M. H. Lidauer, J. Haeggman, T. Mehtioe, J. M. Christensen, E. A. Maentysaari
Summary: This study aimed to investigate the relationships between energy status indicators and fertility traits in dairy cows during different stages of lactation. The findings showed a higher correlation between energy status and fertility traits, especially in multiparous cows.
JOURNAL OF DAIRY SCIENCE
(2022)
Review
Agriculture, Dairy & Animal Science
M. L. Rhoads
Summary: Heat stress has severe consequences for agricultural production, and its impact is exacerbated by global warming. Climate change is predicted to lead to reproductive problems, decreased milk production, and overall productivity losses. Development of technologies and management strategies to improve animal production capacity and efficiency during heat stress is urgently needed.
Article
Agriculture, Dairy & Animal Science
Joanne Marshall, Derek Haley, Lena Levison, David F. Kelton, Cynthia Miltenburg, Steven Roche, Todd F. Duffield
Summary: This study investigated the involvement of bovine veterinarians in Ontario, Canada, in dairy cull cow management decisions and their perspectives on welfare issues and best management practices for cull dairy cows. The findings showed that dairy veterinarians desire greater involvement in cull cow management and believe that their knowledge and decision-making tools can improve the economic and welfare outcomes of culling decisions for dairy producers.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
E. M. Cabrera, M. R. Lauber, T. Valdes-Arciniega, M. S. El Azzi, J. P. N. Martins, T. R. Bilby, P. M. Fricke
Summary: The study aimed to compare the effects of GnRH and hCG treatments on pregnancies per artificial insemination in lactating dairy cows. The results showed that cows treated with GnRH had higher pregnancy rates and there were no significant differences in ovulation time and luteolysis completeness between GnRH and hCG treatments.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Reproductive Biology
Ugur Topaloglu, Muzaffer Aydin Ketani
Summary: Homeobox proteins are found to play critical roles in regulating uterine and placental physiology in cows, with varying immunoreactivity observed in different trimesters of gestation. These proteins may be involved in the regulation of endometrial functions and the proliferation and differentiation of endometrial and placental cells in cows.
Article
Veterinary Sciences
Marina Lopez-Arjona, Eva Mainau, Elena Navarro, Maria Dolores Contreras-Aguilar, Damian Escribano, Sandra V. Mateo, Xavier Manteca, Jose Joaquin Ceron, Silvia Martinez-Subiela
Summary: New assays for measuring oxytocin in bovine saliva were developed and validated in this study. Results showed an increase in oxytocin concentrations on the day of parturition in cows, while a decrease was observed in calves 4 days after grouping. These findings suggest that oxytocin levels in bovine saliva can vary in different physiological or productive situations.
BMC VETERINARY RESEARCH
(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
Laurin Schwarzmann, Arlene Marchand, Barbara Knutti, Rupert Bruckmaier, Heinrich Bollwein, Dragos Scarlet
Summary: This study assessed the effects of postpartum diseases on AFC and AMH concentration in dairy cows, as well as the influence of parity and breed. The results showed no effect of postpartum diseases or breed on AFC or AMH groups. There was a strong interaction between parity and AFC, with primiparous cows having fewer follicles. Pluriparous cows with high AMH concentration had shorter calving to first service and calving to conception intervals, but lower milk yield.
ANIMAL REPRODUCTION SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
Denis Revskij, Susanne Haubold, Christian Plinski, Torsten Viergutz, Armin Tuchscherer, Claudia Kroeger-Koch, Elke Albrecht, Juliane Guenther, Arnulf Troescher, Harald M. Hammon, Hans-Joachim Schuberth, Manfred Mielenz
Summary: The study found that CXCR4 is clearly expressed in the ductal epithelial cells of the mammary gland but not in alveolar epithelial cells. Among leukocyte subsets, monocytes displayed the highest percentage of CXCR4-positive cells, while circulating neutrophils showed almost no CXCR4 surface expression.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Reproductive Biology
C. M. Tippenhauer, I. Steinmetz, W. Heuwieser, P. M. Fricke, M. R. Lauber, E. M. Cabrera, S. Borchardt
Summary: The study aimed to evaluate the effects of two PGF treatments during a 7-d Ovsynch protocol on P4 concentration and P/AI in lactating Holstein cows. The results showed that under specific conditions, this treatment method can increase the P/AI rate.
Article
Agriculture, Dairy & Animal Science
Murat Onur Yazlik, Hatice Esra Colakoglu, Mert Pekcan, Ufuk Kaya, Sukru Kuplulu, Cihan Kacar, Mert Polat, Mehmet Rifat Vural
Summary: The study aimed to evaluate the effects of injectable trace element and vitamin combinations on immune function and reproductive outcomes in dairy cows. Results showed that cows supplemented with trace elements and/or vitamins had higher pregnancy rates, with higher phagocytic activity observed in the ITES+VIT group before calving.
ANIMAL REPRODUCTION SCIENCE
(2021)
Article
Veterinary Sciences
H. Van Loo, O. Bogado Pascottini, S. Ribbens, J. Hooyberghs, B. Pardon, G. Opsomer
Summary: This study aimed to determine the prevalence of infectious agents associated with bovine abortion and perinatal mortality, and found that at least one potential causal agent was detected in 39% of cases. Neospora caninum was the most common pathogen, followed by Trueperella pyogenes, BVDv, Escherichia coli, and Aspergillus fumigatus. Winter was associated with lower positivity for Neospora caninum and BVDv compared to warmer seasons.
PREVENTIVE VETERINARY MEDICINE
(2021)
Article
Agriculture, Dairy & Animal Science
Wei Yang, Shuang Wang, Juan J. Loor, Matheus G. Lopes, Yingying Zhao, Xinru Ma, Ming Li, Bingbing Zhang, Chuang Xu
Summary: This study investigates the role of diacylglycerol acyltransferase isoforms (DGAT1 and DGAT2) in the susceptibility of dairy cows to develop fatty liver. In vivo and in vitro analyses were performed and the results showed that fatty liver and fatty acid challenge led to increased expression of SREBF1, FASN, DGAT1, and DGAT2. The inhibition of DGAT1 and DGAT2 disrupted lipid homeostasis, directing fatty acids towards oxidation and generation of reactive oxygen species.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Food Science & Technology
Oskar Michal Brozek, Katarzyna Kielczewska, Krzysztof Bohdziewicz
Summary: The fatty acid profile and thermal characteristics of ovine and bovine milk were studied, as well as mixtures containing different ratios of bovine and ovine milk. Ovine milk had higher proportions of short-chain fatty acids, long-chain fatty acids, and polyunsaturated fatty acids. The content of bovine milk in the mixtures affected the characteristics of milk fat transitions and the composition of individual fatty acids.
INTERNATIONAL DAIRY JOURNAL
(2022)
Article
Agronomy
Marco Florio, Claudia Giannone, Andrea Ianni, Francesca Bennato, Lisa Grotta, Giuseppe Martino
Summary: This study aimed to investigate the variations in cow milk composition based on different breeding systems and seasonal changes. The results showed that milk samples from outdoor grazing had lower concentrations of saturated fatty acids and higher concentrations of rumenic, vaccenic, and oleic acids, as well as a greater presence of specific caseins. In contrast, intensive farming showed the opposite results. The concentration of retinol significantly increased during summer in both breeding systems.
