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Treatment practices after calving-related events on 45 dairy farms in California.

N Silva-Del-Río, A Valldecabres, A Espadamala, A García-Muñoz, P Pallares, A Lago, F S Lima, R V Pereira,

Retained fetal membranes (RFM), dystocia, and twinning are common postpartum events that increase the risk of metritis, impair reproductive performance, and contribute to antimicrobial use on dairies. The overall objective of this study was to describe treatment decisions after RFM, severe dystocia (cesarean section and fetotomy), nonsevere dystocia (nonmechanical and ... Read more >>

J Dairy Sci (Journal of dairy science)
[2021, :]

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Association of low serum calcium concentration after calving with productive and reproductive performance in multiparous Jersey cows.

Ainhoa Valldecabres, Noelia Silva-Del-Río,

Consequences of postpartum low blood calcium (Ca) concentration are still under study and literature describing this condition in Jersey cows is scarce. A prospective cohort study was conducted to evaluate the association of low serum Ca concentration shortly after calving with milk and energy-corrected milk yields, somatic cell count linear ... Read more >>

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[2021, :]

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Understanding preferences for, and consumer behavior toward, cheese among a cohort of young, educated, internationally mobile Chinese consumers.

Hao Ouyang, Bozhao Li, Mary McCarthy, Song Miao, Kieran Kilcawley, Mark Fenelon, Alan Kelly, Jeremiah J Sheehan,

This study explores the experiences of a cohort of young, educated, internationally mobile Chinese consumers with cheese and other dairy products, and how these experiences shape their behavior toward cheese products. In total, 41 Chinese students studying at an Irish university participated in 5 focus groups (n = 41, n ... Read more >>

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[2021, :]

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Poly-l-lysine-functionalized magnetic beads combined with polymerase chain reaction for the detection of Staphylococcus aureus and Escherichia coli O157:H7 in milk.

Mei Deng, Yutong Wang, Guanhua Chen, Ju Liu, Zhengzheng Wang, Hengyi Xu,

Rapid and credible detection of pathogens is essential to prevent and control outbreaks of foodborne diseases. In this study, a poly-l-lysine-functionalized magnetic beads (PLL-MB) strategy combined with a PCR assay was established to detect Staphylococcus aureus. We also detected Escherichia coli O157:H7 to further verify the strategy for gram-negative bacteria ... Read more >>

J Dairy Sci (Journal of dairy science)
[2021, :]

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Genetic parameters and weighted single-step genome-wide association study for supernumerary teats in Holstein cattle.

H Wen, H Luo, M Yang, S M A Augustino, D Wang, S Mi, Y Guo, Y Zhang, W Xiao, Y Wang, Y Yu,

Supernumerary teats (SNT) are a common epidermal abnormality of udders in mammals. The SNT negatively affect machine milking ability, udder health, and animal welfare and sometimes act as reservoirs for undesirable bacteria, resulting in economic losses on calves and lactating cows due to the cost of SNT removal surgery, early ... Read more >>

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[2021, :]

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Shifts in diversity and function of bacterial community during manufacture of Rushan.

Jiang Yang, Peng Yu, Xiaoming Liu, Jianxin Zhao, Hao Zhang, Wei Chen,

Rushan is a traditional dairy product consumed by the Bai people in the Yunnan Province of China, and its production still follows the traditional procedure of backslopping. However, how the microbial composition of raw materials and processing shape the microorganisms in Rushan have not been systemically reported. In this study, ... Read more >>

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[2021, :]

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Perspective: A commentary on elevated palmitic acid levels in Canadian butter and their relationship to butter hardness.

Alejandro G Marangoni, Saeed M Ghazani,

J Dairy Sci (Journal of dairy science)
[2021, 104(9):9380-9382]

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Effects of supplementing Saccharomyces cerevisiae fermentation products to dairy cows from the day of dry-off through early lactation.

A M Zontini, E Zerbini, A Minuti, E Trevisi,

The scope of this experiment was to study the effects of Saccharomyces cerevisiae fermentation product (SCFP; NutriTek, Diamond V) on milk yield, milk composition, somatic cell count, rumination activity, and immunometabolic profile (inflammation) of dairy cows during the peripartum period. Postpartum inflammation severity was evaluated as the liver functionality index ... Read more >>

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[2021, :]

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Abomasal infusion of corn starch and β-hydroxybutyrate in early-lactation Holstein-Friesian dairy cows to induce hindgut and metabolic acidosis.

Sanne van Gastelen, Jan Dijkstra, Sven J J Alferink, Gisabeth Binnendijk, Kelly Nichols, Tamme Zandstra, André Bannink,

The objectives of this study were to induce hindgut and metabolic acidosis via abomasal infusion of corn starch and β-hydroxybutyrate (BHB), respectively, and to determine the effects of these physiological states in early-lactation dairy cows. In a 6 × 6 Latin square design, 6 rumen-fistulated Holstein-Friesian dairy cows (66 ± ... Read more >>

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[2021, :]

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Subclinical mastitis in dairy cows in major milk-producing areas of Sri Lanka: Prevalence, associated risk factors, and effects on reproduction.

R M S B K Ranasinghe, R M C Deshapriya, D I Abeygunawardana, R Rahularaj, C M B Dematawewa,

Compared with clinical mastitis, the subclinical form of mastitis (SCM) is more common and thought to cause more economic losses to the dairy industry. The current study aimed to investigate the prevalence, risk factors of SCM, and effects on reproduction of dairy cows in major milk-producing areas of Sri Lanka. ... Read more >>

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[2021, :]

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Genetic parameters and genomic regions associated with horn fly resistance in organic Holstein cattle.

B L Basiel, L C Hardie, B J Heins, C D Dechow,

Horn flies (Haematobia irritans [L.]) contribute to major economic losses of pastured cattle operations, particularly in organic herds because of limitations on control methods that can be used. The objectives of this research were to determine if resistance to horn flies is a heritable trait in organic Holstein cattle, determine ... Read more >>

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[2021, :]

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Risk factors for purulent vaginal discharge and its association with reproductive performance of lactating Jersey cows.

J G N Moraes, P R B Silva, L G D Mendonça, C T C Okada, R C Chebel,

Despite the rapid growth in popularity of the Jersey breed, most research on dairy cows in the United States has been done with the Holstein breed. Postpartum uterine diseases negatively influence reproductive performance of dairy cows and limited data are available regarding predisposing factors for uterine diseases in Jersey cows. ... Read more >>

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[2021, :]

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Sirtuin 3 inhibits nuclear factor-κB signaling activated by a fatty acid challenge in bovine mammary epithelial cells.

Lei Liu, Hong Lu, Juan J Loor, Ahmad Aboragah, Xiliang Du, Jianhua He, Tao Peng, Jianming Su, Zhe Wang, Guowen Liu, Xinwei Li,

Susceptibility to mastitis is highest during the peripartal (transition) period and is often concomitant with other comorbidities such as ketosis. Although infection with pathogenic microorganisms and immune-dysfunction around calving clearly play key roles in mastitis development, other metabolic factors also contribute. Sirtuin 3 (SIRT3), a mitochondrial deacetylase regulating energy and ... Read more >>

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[2021, :]

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Corrigendum to "Milk urea nitrogen variation explained by differences in urea transport into the gastrointestinal tract in lactating dairy cows" (J. Dairy Sci. 104:6715-6726).

V C Souza, M Aguilar, M Van Amburgh, W A D Nayananjalie, M D Hanigan,

J Dairy Sci (Journal of dairy science)
[2021, 104(9):10426]

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Perspective: A commentary on the effect of palmitic acid feeding on thermal properties of milk fat.

Kevin J Harvatine,

J Dairy Sci (Journal of dairy science)
[2021, 104(9):9377-9379]

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Educational interventions to address misconceptions about antibiotic residues in milk can alter consumer perceptions and may affect purchasing habits.

Laurel E Redding, Brianna Parsons, Joseph S Bender,

The industrialization of the agri-food industry and resultant decrease in the number of people employed on farms has contributed to a knowledge gap among consumers about food production processes. A commonly reported concern of dairy consumers is the use of antibiotics in dairy animals, even though these drugs are an ... Read more >>

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[2021, :]

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Reducing metabolizable protein supply: Effects on milk production, blood metabolites, and health in early-lactation dairy cows.

Yu Zang, Peng Ji, Sarah Y Morrison, Yoritaka Koba, Richard J Grant, Heather M Dann,

Our objective was to evaluate the effect of metabolizable protein (MP) supply on milk production, blood metabolites, and health in dairy cows during early lactation. Three experimental diets were formulated to contain 114, 107, 101 g of MP/kg of dry matter (DM; 114MP, 107MP, and 101MP, respectively) with crude protein ... Read more >>

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[2021, :]

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Plasma progesterone concentration after first service is associated with individual genetic traits, postpartum phenotypes, and likelihood of conception in seasonal-calving pasture-based dairy cows.

E Rojas Canadas, M M Herlihy, J Kenneally, F Kearney, J Furlong, P Lonergan, S T Butler,

The aims of this study were to (1) evaluate postpartum phenotypes, cow factors, and genetic traits associated with plasma progesterone (P4) concentrations after first artificial insemination (AI); (2) determine variation in daily plasma P4 concentrations between d 7 and 13 after first AI; and (3) evaluate associations between plasma P4 ... Read more >>

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[2021, :]

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The effect of a double dose of cloprostenol sodium on luteal blood flow and pregnancy rates per artificial insemination in lactating dairy cows.

T Minela, A Santos, E J Schuurmans, E L Middleton, J R Pursley,

Inadequate luteolysis in fertility programs is a problem for lactating dairy cows treated with a single dose of PGF<sub>2α</sub>. The proportion of cows with complete luteolysis can be increased by administering 2 doses of PGF<sub>2α</sub> 24 h apart. This study hypothesized that a double dose of cloprostenol sodium (1.0 mg) ... Read more >>

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[2021, :]

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Determination of energy and protein requirements of preweaned dairy calves: A multistudy approach.

Marcos I Marcondes, Alex L Silva,

The first studies concerning nutrient requirements for preweaned dairy calves were from the 1920s and 1930s; however, few studies were published in the following decades. We aimed to determine energy and protein requirements of preweaning Holstein and Holstein × Gyr dairy calves in a multistudy meta-regression. We used a database ... Read more >>

J Dairy Sci (Journal of dairy science)
[2021, :]

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Metabolomics of acid whey derived from Greek yogurt.

Muriel M Allen, Oscar A Pike, Jason D Kenealey, Michael L Dunn,

Acid whey, a byproduct of Greek yogurt production, has little commercial value due to its low protein content and is also environmentally harmful when disposed of as waste. However, as a product of microbial fermentation, acid whey could be a rich source of beneficial metabolites associated with fermented foods. This ... Read more >>

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[2021, :]

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Longitudinal study of Staphylococcus aureus genotypes isolated from bovine clinical mastitis.

M Leijon, E Atkins, K Persson Waller, K Artursson,

Bovine clinical mastitis is an important problem for the dairy industry, and Staphylococcus aureus is a common mastitis-causing pathogen in many countries. Detailed knowledge on genetic variation of Staph. aureus strains within the bovine population, including changes over time, can be useful for mastitis control programs, because severity of disease ... Read more >>

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[2021, :]

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Free fatty acids impair autophagic activity and activate nuclear factor kappa B signaling and NLR family pyrin domain containing 3 inflammasome in calf hepatocytes.

Taiyu Shen, Xinwei Li, Bo Jin, Juan J Loor, Ahmad Aboragah, Lingxue Ju, Zhiyuan Fang, Hao Yu, Meng Chen, Yiwei Zhu, Hongsheng Ouyang, Yuxiang Song, Zhe Wang, Xiliang Du, Guowen Liu,

Free fatty acids (FFA)-induced hepatic inflammation agravates liver injury and metabolic dysfunction in dairy cows with ketosis or fatty liver. Under stressful conditions, autophagy is generally considered as a cell protection mechanism, but whether the FFA-induced inflammatory and stress effect on hepatocytes involves an autophagy response is not well known. ... Read more >>

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[2021, :]

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Effects of yeast culture supplementation on lactation performance and rumen fermentation profile and microbial abundance in mid-lactation Holstein dairy cows.

J Halfen, N Carpinelli, F A B Del Pino, J D Chapman, E D Sharman, J L Anderson, J S Osorio,

The continuous trend for a narrowing margin between feed cost and milk prices across dairy farms in the United States highlights the need to improve and maintain feed efficiency. Yeast culture products are alternative supplements that have been evaluated in terms of milk performance and feed efficiency; however, less is ... Read more >>

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[2021, :]

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Economic impact of adding a second prostaglandin F treatment during an Ovsynch protocol using a meta-analytical assessment and a stochastic simulation model.

S Borchardt, C M Tippenhauer, P M Fricke, W Heuwieser,

Incomplete luteal regression after treatment with a single dose of PGF<sub>2α</sub> during an Ovsynch protocol decreases fertility to timed artificial insemination (AI). An additional treatment with PGF<sub>2α</sub> 24 h after the first dose has been recommended to increase the proportion of cows with complete luteal regression and subsequent pregnancy per ... Read more >>

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