Article
Agriculture, Dairy & Animal Science
N. Browne, C. D. Hudson, R. E. Crossley, K. Sugrue, E. Kennedy, J. N. Huxley, M. Conneely
Summary: This observational study aimed to identify cow-level and herd-level risk factors for lameness in a pasture-based system, based on predictors from the housing and grazing periods. Important risk factors for increased lameness prevalence were age and genetic predicted transmitting ability for lameness at the cow-level, and farm and herd size, infrastructure factors, presence of digital dermatitis, and farmers' perception of lameness as a problem at the herd-level. The findings provide valuable insights for future randomized clinical trials.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Reproductive Biology
Emmet T. Kelly, Conor G. McAloon, Luke O'Grady, J. Furlong, Mark A. Crowe, Marijke E. Beltman
Summary: The study found that in seasonal calving pasture-based systems, the accuracy of estrus detection was lower at first insemination but higher at repeat insemination. Factors such as absence of mounting abrasion may increase the risk of inaccurate estrus detection.
Article
Agriculture, Dairy & Animal Science
R. M. S. B. K. Ranasinghe, R. M. C. Deshapriya, D. Abeygunawardana, R. Rahularaj, C. M. B. Dematawewa
Summary: The study in major milk-producing areas of Sri Lanka found that subclinical mastitis (SCM) has a high prevalence and is mainly caused by Staphylococcus aureus. Logistic regression analysis showed that the prevalence of SCM is influenced by factors such as parity, farming system, and region. SCM affects the number of artificial inseminations and the days from calving to artificial insemination in dairy cows.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
A. Vanhoudt, K. Orsel, M. Nielen, T. van Werven
Summary: The study aimed to identify associations between a DD risk score and DD prevalence, and explore the impact of DD RAQ on farmers' management of DD. However, the findings suggest that simply using RAQ and providing a summary were insufficient to initiate behavioral changes that would lead to a decrease in DD prevalence.
JOURNAL OF DAIRY SCIENCE
(2021)
Review
Agriculture, Dairy & Animal Science
Otto Szenci
Summary: Pregnancy diagnosis is crucial in dairy farms for reducing days open, with traditional and new methods available in the field. Accuracy is key before introducing new diagnostic tests to minimize iatrogenic pregnancy losses. Techniques like B-mode ultrasonography and biomarkers show promise for early pregnancy detection, but further development is needed.
Article
Agriculture, Dairy & Animal Science
K. A. Hagner, H. S. Nordgren, K. Aaltonen, K. Sarjokari, H. Rautala, T. Sironen, A. Sukura, P. J. Rajala-Schultz
Summary: The increasing mortality rate among dairy cows is a global problem in modern production systems, causing economic losses and indicating health and welfare issues. This study aimed to determine the causes of on-farm mortality in Finnish dairy cows, assess the usefulness of histopathologic analysis in necropsies, and evaluate the reliability of producers' perception about the cause of death. The most common underlying causes of death were mastitis, followed by digestive disorders, known disorders, calving-related disorders, and locomotion disorders. Necropsies, including routine histopathologic analysis, provided accurate and reliable information for developing control programs for cow mortality.
JOURNAL OF DAIRY SCIENCE
(2023)
Review
Agriculture, Dairy & Animal Science
Ligia C. Moreira, Guilherme J. M. Rosa, Daniel M. Schaefer
Summary: Despite over 3 million dairy cows entering the U.S. food supply chain each year, research on this topic is limited. This review highlights the importance of dairy cows as a beef source and provides an overview of various topics from farm to meat product, including culling, marketing, transportation, welfare, body composition, carcass characteristics, meat quality, and traceability.
JOURNAL OF ANIMAL SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
S. Fernandes, G. Pereira, R. Bexiga
Summary: In order to maximize the return on capital invested in the milking parlour, it is important to milk the largest number of cows gently and completely in the shortest amount of time. Bimodal milk flow and overmilking negatively affect milk removal efficiency and teat health. This observational study aimed to investigate the prevalence of bimodal milk flow and overmilking, identify associated variables, and examine their impact on milk yield and teat changes.
Review
Agriculture, Dairy & Animal Science
W. J. McFarlane, D. L. Renaud, C. N. Reedman, T. F. Duffield, M. B. Van Camp, C. B. Winder
Summary: This scoping review provides a comprehensive overview of the literature investigating nonambulatory conditions in dairy cattle, including risk factors, treatments, and prognostic factors. The study found gaps in the research regarding prognostic indicators for recovery, alternative treatments to calcium administration, and appropriate terminology for categorizing nonambulatory cattle.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
Liliana Fadul-Pacheco, Michael Liou, Douglas J. Reinemann, Victor E. Cabrera
Summary: Cows are social animals and understanding their social dynamics through social network analysis can help improve management and welfare. This study identified affinity pairs of cows that showed increased stress when separated, leading to higher milk production variability. The results suggest that social network analysis could be a useful tool for reducing milk yield variation and understanding the social dynamics of dairy cows.
Review
Food Science & Technology
Lily Jaiswal, Mulumebet Worku
Summary: Cow's milk contains potential allergens in the form of proteins, making some infants, children, and adults allergic to cow's milk. Strict exclusion of milk and other dairy products puts children with cow's milk allergy at higher nutritional risk.
CRITICAL REVIEWS IN FOOD SCIENCE AND NUTRITION
(2022)
Article
Agriculture, Dairy & Animal Science
J. Perez-Baez, T. Silva, C. A. Risco, R. C. Chebel, F. Cunha, A. De Vries, J. E. P. Santos, F. S. Lima, P. Pinedo, G. M. Schuenemann, R. C. Bicalho, R. O. Gilbert, S. Rodrigez-Zas, C. M. Seabury, G. Rosa, W. W. Thatcher, K. N. Galvao
Summary: This study aimed to estimate the cost of metritis in dairy herds and found that metritis led to decreased milk production, reproduction, and survival, resulting in significant economic losses for dairy herds.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
S. McDougall, J. Penry, D. Dymock
Summary: The study indicated that bacterial isolates from organic herds had lower antibiotic resistance compared to herds using dry cow therapy (DCT). However, the differences in MIC distributions occurred below clinical breakpoints, suggesting that bacteriological cure rates may not be affected by isolates with different MIC levels.
JOURNAL OF DAIRY SCIENCE
(2021)
Review
Agriculture, Dairy & Animal Science
Klaus Eder, Denise K. Gessner, Robert Ringseis
Summary: FGF21 has been identified as an important regulator of carbohydrate and lipid metabolism in dairy cows. Research suggests that the plasma concentration of FGF21 is dramatically increased at parturition and remains high during the first weeks of lactation, indicating its potential significance for metabolic adaptation in dairy cows. Further studies are needed to better understand the functions of FGF21 in this species.
JOURNAL OF ANIMAL SCIENCE AND BIOTECHNOLOGY
(2021)
Article
Agriculture, Dairy & Animal Science
B. Foris, L. G. Mangilli, J. M. C. Van Os, M. A. G. von Keyserlingk, J. A. Fregonesi, D. M. Weary
Summary: Cows sometimes defecate while lying down, especially when early in gestation or spending more time lying. Overstocking leads to higher stall use and displacement but does not increase defecating while recumbent frequency.
JOURNAL OF DAIRY SCIENCE
(2022)