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Journal of Dairy Science

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https://www.readbyqxmd.com/read/29778485/meta-analysis-of-2-hydroxy-4-methylthio-butanoic-acid-supplementation-on-ruminal-fermentation-milk-production-and-nutrient-digestibility
#1
X Feng, R R White, H A Tucker, M D Hanigan
Methionine is considered one of the most important essential AA for milk protein synthesis in dairy cows. Supplementation of unprotected, free Met is nearly 100% degraded by ruminal microorganisms, which complicates supplementation. 2-Hydroxy-4-methylthio-butanoic acid (HMTBa) can be converted to Met in the body and is used as a Met source in dairy production. However, results of published studies assessing the effects of supplementing Met sources, including HMTBa, on performance variables are inconsistent...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778484/effect-of-grain-or-by-product-based-concentrate-fed-with-early-or-late-harvested-first-cut-grass-silage-on-dairy-cow-performance
#2
D Pang, T Yan, E Trevisi, S J Krizsan
This study compared the effects of a grain-based conventional concentrate (GC) and a concentrate based on agro-industrial by-products (BC), fed with grass silage harvested at early (ES) or late (LS) maturity stage, on dairy performance, CH4 and CO2 emissions, and metabolic status of dairy cows. Twenty lactating Nordic Red cows averaging 81 d in milk and 31.9 kg of milk/d pre-trial were assigned to a replicated 4 × 4 Latin square design. Dietary treatments were in a 2 × 2 factorial arrangement. The silages were harvested 2 wk apart from the same primary growth grass ley...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778483/effect-of-replacing-maize-silage-with-red-clover-silage-in-the-diet-on-milk-fatty-acid-composition-in-cows
#3
Franziska Schulz, Edwin Westreicher-Kristen, Joachim Molkentin, Karin Knappstein, Andreas Susenbeth
This study aimed to evaluate the effect of replacing maize silage plus soybean meal with red clover silage (RCS) plus wheat on the fatty acid (FA) profile in the milk fat of cows. Forty-four lactating German Holstein cows were used in a 4 × 4 Latin square design with 21-d periods composed of 13 d of adaptation to diets followed by an 8-d sampling phase. Experimental diets offered as total mixed ration consisted of a constant forage-to-concentrate ratio (75:25) with target proportions of RCS to maize silage of 15:60 (RCS15 ), 30:45 (RCS30 ), 45:30 (RCS45 ), and 60:15 (RCS60 ) on a dry matter basis...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778482/randomized-noninferiority-field-trial-evaluating-cephapirin-sodium-for-treatment-of-nonsevere-clinical-mastitis
#4
T Tomazi, T A F Lopes, V Masson, J M Swinkels, M V Santos
The general objective of this study was to evaluate whether cephapirin sodium is noninferior compared with a positive control broad-spectrum product formulated with a combination of antimicrobials for intramammary treatment of nonsevere clinical mastitis. In addition, we compared the efficacy of treatments on the cure risks of pathogen groups (gram-positive, gram-negative, and cultures with no growth) based on culture results. A total of 346 cows distributed in 31 commercial dairy herds were selected to participate in the study, although only 236 met the criteria for evaluation of microbiological cure...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778481/health-benefits-of-orally-administered-anti-il-10-antibody-in-milk-fed-dairy-calves
#5
S M Raabis, T L Ollivett, M E Cook, J M Sand, S M McGuirk
The primary objective of this randomized controlled trial was to determine whether anti-IL-10 egg yolk antibodies fed upon arrival to a calf ranch would lower the prevalence of Cryptosporidium parvum shedding in naturally challenged preweaned dairy calves. The secondary objectives included measuring the effect of anti-IL-10 antibodies on calf health, performance, and shedding of less common diarrheal pathogens. A total of 133 calves, enrolled at 24 to 72 h of age, received a daily dose of 0.96 g of egg yolk powder with anti-IL-10 antibodies (MAB, n = 71) or without anti-IL-10 antibodies (MEP, n = 62) split between 2 feedings for the first 11 d on feed at a calf ranch...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778480/relationship-between-herd-size-and-measures-of-animal-welfare-on-dairy-cattle-farms-with-freestall-housing-in-germany
#6
Daniel Gieseke, Christian Lambertz, Matthias Gauly
The objective of this study was to examine the association of herd size with animal welfare in dairy cattle herds. Therefore, 80 conventional dairy cattle farms were classified by the number of cows into 4 herd size classes, C1 (<100 cows), C2 (100-299 cows), C3 (300-499 cows), and C4 (≥500 cows), and assessed using multiple animal-based measures of the Welfare Quality Assessment protocol for dairy cattle. Data were recorded from April 2014 to September 2016 by an experienced single assessor in Northern Germany...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778479/an-in-vivo-stable-isotope-based-approach-for-assessment-of-absorbed-amino-acids-from-individual-feed-ingredients-within-complete-diets
#7
K A Estes, R R White, P S Yoder, T Pilonero, H Schramm, H Lapierre, M D Hanigan
Accurate assessment of the nutritional content of feed ingredients is required for precise diet formulation. Characterizing ingredients in terms of absorption and digestibility of individual AA is challenging, and this information often relies on indirect methods. The purpose of this research was to evaluate an in vivo stable isotope-based method of determining plasma entry rates of individual AA from feather meal (FM), blood meal (BM), and a rumen-protected AA (RPMet). Abomasal infusions of unprotected Ile, Leu, Met, and sodium caseinate were used as control treatments to assess technique reliability and accuracy...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778478/quantitative-proteomics-of-lactococcus-lactis-f44-under-cross-stress-of-low-ph-and-lactate
#8
Hao Wu, Yue Zhao, Yuhui Du, Sen Miao, Jingui Liu, Yanni Li, Qinggele Caiyin, Jianjun Qiao
Lactococcus lactis encounters 3 environmental stimuli, H+ , lactate, and undissociated lactic acid, because of the accumulation of lactic acid-the predominant fermentation product. Few studies have examined how these stimuli synergistically affect the bacteria. Herein, we analyzed the dissociation degree of lactic acid at different pH and investigated the cellular response to cross-stress in L. lactis ssp. lactis F44 through quantitative proteomic analysis using isobaric tags for relative and absolute quantitation of 3 groups: 0% lactic acid with pH 4...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778477/the-effects-of-microfluidization-on-the-physical-microbial-chemical-and-coagulation-properties-of-milk
#9
A J Bucci, D L Van Hekken, M H Tunick, J A Renye, P M Tomasula
This work examines the use of mild heat treatments in conjunction with 2-pass microfluidization to generate cheese milk for potential use in soft cheeses, such as Queso Fresco. Raw, thermized, and high temperature, short time pasteurized milk samples, standardized to the 3% (wt/wt) fat content used in cheesemaking, were processed at 4 inlet temperature and pressure conditions: 42°C/75 MPa, 42°C/125 MPa, 54°C/125 MPa, and 54°C/170 MPa. Processing-induced changes in the physical, chemical, and microbial properties resulting from the intense pressure, shear, and cavitation that milk experiences as it is microfluidized were compared with nonmicrofluidized controls...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778476/glycation-of-whey-protein-with-dextrans-of-different-molar-mass-effect-on-immunoglobulin-e-binding-capacity-with-blood-sera-obtained-from-patients-with-cow-milk-protein-allergy
#10
Lei Xu, Yuansheng Gong, James E Gern, Shinya Ikeda, John A Lucey
A growing concern around the world is the number of people who are suffering from food protein allergies. One potential approach to decrease protein allergenicity is to block IgE-binding epitopes of the protein allergen by attachment of polysaccharides via the Maillard reaction (i.e., glycation). Protein glycation has been extensively studied to modify various functional properties. We wanted to examine whether glycates could reduce IgE binding in patients with cow milk protein allergy and to explore how the size (molar mass; MW ) of the polysaccharide affects this IgE-binding capacity...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778475/performance-nutritional-behavior-and-metabolic-responses-of-calves-supplemented-with-forage-depend-on-starch-fermentability
#11
S Mojahedi, M Khorvash, G R Ghorbani, E Ghasemi, M Mirzaei, F Hashemzadeh-Cigari
This study evaluated the interactive effects of forage provision on performance, nutritional behavior, apparent digestibility, rumen fermentation, and blood metabolites of dairy calves when corn grains with different fermentability were used. Sixty 3-d-old Holstein calves were randomly assigned to 1 of 4 treatments in a 2 × 2 factorial arrangement. Dietary treatments were (1) steam-flaked (SF) corn without alfalfa hay (AH) supplementation (SF-NO), (2) SF corn with AH supplementation (SF-AH), (3) cracked (CR) corn without AH supplementation (CR-NO), and (4) CR corn with AH supplementation (CR-AH)...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778474/a-longitudinal-observational-study-of-the-dynamics-of-mycoplasma-bovis-antibodies-in-naturally-exposed-and-diseased-dairy-cows
#12
Mette B Petersen, Jeanette Pedersen, Dinah L Holm, Matthew Denwood, Liza R Nielsen
Mycoplasma bovis is an important pathogen causing disease and substantial economic losses in cattle. However, knowledge of the dynamics of antibody responses in individual cows in the face of an outbreak is currently extremely limited. The use of commercial antibody tests to support clinical decision-making and for surveillance purposes is therefore challenging. Our objective was to describe the dynamics of M. bovis antibody responses in 4 Danish dairy herds experiencing an acute outbreak of M. bovis-associated disease, and to compare the antibody dynamics between dairy cows with different disease manifestations...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778473/characterization-of-best-linear-unbiased-estimates-generated-from-national-genetic-evaluations-of-reproductive-performance-survival-and-milk-yield-in-dairy-cows
#13
F L Dunne, M M Kelleher, S W Walsh, D P Berry
Genetic evaluations decompose an observed phenotype into its genetic and nongenetic components; the former are termed BLUP with the solutions for the systematic environmental effects in the statistical model termed best linear unbiased estimates (BLUE). Geneticists predominantly focus on the BLUP and rarely consider the BLUE. The objective of this study, however, was to define and quantify the association between 8 herd-level characteristics and BLUE for 6 traits in dairy herds, namely (1) age at first calving, (2) calving to first service interval (CFS), (3) number of services, (4) calving interval (CIV), (5) survival, and (6) milk yield...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778472/effects-of-ad-libitum-milk-replacer-feeding-and-butyrate-supplementation-on-behavior-immune-status-and-health-of-holstein-calves-in-the-postnatal-period
#14
C Gerbert, D Frieten, C Koch, G Dusel, K Eder, T Stefaniak, J Bajzert, P Jawor, A Tuchscherer, H M Hammon
Animal welfare in dairy calf husbandry depends on calf rearing and is probably improved by intensive milk feeding programs. In addition, butyrate supplementation in milk replacer (MR) stimulates postnatal growth and may affect the immune system in calves. We have investigated the combined effects of ad libitum MR feeding and butyrate supplementation on feeding behavior, health, and the immune responses in calves. Holstein calves (n = 64) were examined from birth until wk 11 of age. Calves received MR either ad libitum (Adl) or restrictively (Res) with (AdlB+, ResB+) or without (AdlB-, ResB-) 0...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778471/influence-of-protein-content-and-storage-temperature-on-the-particle-morphology-and-flowability-characteristics-of-milk-protein-concentrate-powders
#15
Karthik Sajith Babu, Kaliramesh Siliveru, J K Amamcharla, Praveen V Vadlani, R P Kingsly Ambrose
Milk protein concentrate (MPC) powders are widely used as ingredients for food product formulations due to their nutritional profile and sensory attributes. Processing parameters, storage conditions, and composition influences the flow properties of MPC powders. This study investigated the bulk and shear flow properties of 70.3, 81.5, and 88.1% (wt/wt, protein content) MPC after storage for 12 wk at 25 and 40°C. Additionally, the morphological and functional changes of the MPC powders were investigated and correlated with flowability...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778470/genetic-diversity-of-thermoduric-spoilage-microorganisms-of-milk-from-brazilian-dairy-farms
#16
J C Ribeiro Júnior, R Tamanini, A L M de Oliveira, A A Alfieri, V Beloti
When correctly pasteurized, packaged, and stored, milk with low total bacterial counts (TBC) has a longer shelf life. Therefore, microorganisms that resist heat treatments are especially important in the deterioration of pasteurized milk and in its shelf life. The aim of this work was to quantify the thermoduric microorganisms after the pasteurization of refrigerated raw milk samples with low TBC and to identify the diversity of these isolates with proteolytic or lipolytic potential by RFLP analysis. Twenty samples of raw milk were collected in bulk milk tanks shortly after milking in different Brazilian dairy farms and pasteurized...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778469/communications-of-staphylococcus-aureus-and-non-aureus-staphylococcus-species-from-bovine-intramammary-infections-and-teat-apex-colonization
#17
Yasser S Mahmmod, Ilka Christine Klaas, Line Svennesen, Karl Pedersen, Hanne Ingmer
The role of non-aureus staphylococci (NAS) in the risk of acquisition of intramammary infections with Staphylococcus aureus is vague and still under debate. The objectives of this study were to (1) investigate the distribution patterns of NAS species from milk and teat skin in dairy herds with automatic milking systems, and (2) examine if the isolated NAS influences the expression of S. aureus virulence factors controlled by the accessory gene regulator (agr) quorum sensing system. In 8 herds, 14 to 20 cows with elevated somatic cell count were randomly selected for teat skin swabbing and aseptic quarter foremilk samples from right hind and left front quarters...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778468/herd-level-associations-between-human-animal-relationship-management-fecal-cortisol-metabolites-and-udder-health-of-organic-dairy-cows
#18
S Ivemeyer, C Simantke, A Ebinghaus, P H Poulsen, J T Sorensen, T Rousing, R Palme, U Knierim
Impact patterns of human-animal relationship (HAR) and herd stress level on udder health were investigated in a cross-sectional study on 30 German and Danish organic dairy herds also taking into account influencing factors regarding housing and management. Cow behavior (avoidance distance, tolerance to tactile interaction, release behavior) was assessed in tests, milkers' behavior recorded during milking, and information about contacts with animals during routine work gathered by interview. Additionally, stockpersons' attitudes were recorded via questionnaires...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778467/short-communication-effect-of-abomasal-inorganic-phosphorus-infusion-on-phosphorus-absorption-in-large-intestine-milk-production-and-phosphorus-excretion-of-dairy-cattle
#19
X Feng, P P Ray, J P Jarrett, L Karpinski, B Jones, K F Knowlton
The objective of the study was to evaluate the effect of inorganic phosphorus (Pi) infusion on P absorption in large intestine, milk production, and phosphorus excretion. Four ruminally and ileally cannulated crossbred cows were used in a 4 × 4 Latin square with 21-d periods. Cows were fed a total mixed ration containing 0.21% P, providing 50% of the cows' P requirement. Cobalt-EDTA was used as marker to measure large intestine digesta flow. On d 13 to 21 of each period, each cow was infused daily with 0, 20...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29753490/technical-note-evaluation-of-a-sonographic-overbagging-edema-scoring-system-for-show-cows-comparison-with-visual-inspection
#20
M Balmer, M Alsaaod, M Boesiger, R O'Brien, A Steiner
Overbagged udders are commonly seen at dairy cow shows due to prolonged milking intervals. The aims of this study were to describe the prevalence of udder edema in dairy cows at shows as determined by sonography and to suggest a sonographic scoring system, which was evaluated for reproducibility and repeatability. At 4 highly competitive Swiss dairy cow shows, 319 cows of various breeds were examined. Sonographic scans-1 from each fore quarter and 1 from the rear, representing both hind quarters-were collected by 3 experienced veterinarians at defined positions predisposed to overbagging edema...
May 9, 2018: Journal of Dairy Science
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