scholarly journals Association between somatic cell count early in the first lactation and the lifetime milk yield of cows in Irish dairy herds

2013 ◽  
Vol 96 (5) ◽  
pp. 2951-2959 ◽  
Author(s):  
S.C. Archer ◽  
F. Mc Coy ◽  
W. Wapenaar ◽  
M.J. Green
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Milk Yield ◽  
Somatic Cell Count ◽  
Dairy Herds

scholarly journals Association between somatic cell count during the first lactation and the cumulative milk yield of cows in Irish dairy herds

2014 ◽  
Vol 97 (4) ◽  
pp. 2135-2144 ◽  
Author(s):  
S.C. Archer ◽  
F. Mc Coy ◽  
W. Wapenaar ◽  
M.J. Green
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Milk Yield ◽  
Somatic Cell Count ◽  
Dairy Herds

Milk yield and somatic cell count during the following lactation after selective treatment of cows at dry-off

2011 ◽  
Vol 78 (4) ◽  
pp. 489-499 ◽  
Author(s):  
Päivi J Rajala-Schultz ◽  
Audrey H Torres ◽  
Fred J DeGraves
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Milk Yield ◽  
Somatic Cell Count ◽  
Negative Impact ◽  
Clinical Mastitis ◽  
Dairy Herds ◽  
Selective Treatment ◽  
The Impact ◽  
To Receive

Selective dry cow therapy (SDCT) has received increasing attention in recent years owing to global concerns over agricultural use of antimicrobial drugs and development of antimicrobial resistance. The objective of this study was to evaluate the effect of SDCT on milk yield and somatic cell count (SCC) in dairy herds in the USA. Cows in four Ohio dairy herds were categorized into two groups (low-SCC and high-SCC) at dry-off based on their SCC and clinical mastitis (CM) history during the lactation preceding the dry-off. Low-SCC cows were randomly assigned to receive or not to receive intramammary antibiotics at dry-off. Milk yield and SCC of these cows during the following lactation were compared using linear mixed effects models, adjusting for parity, calving season, stage of lactation, previous lactation milk yield and herd. Milk yield of untreated and treated low-SCC cows at dry-off did not differ significantly during the following lactation. Overall, treated low-SCC cows had 16% lower SCC (approximately 35 000 cells/ml, P=0·0267) than the untreated cows during the following lactation; however, the effect was variable in different herds. Moreover the impact of treatment, or the lack thereof, on milk yield varied considerably between herds. The results suggested that in some herds treating all cows at dry-off may be beneficial while in other herds leaving healthy cows without antibiotic dry cow treatment has no negative impact on milk yield or milk quality (SCC), and in fact, may be beneficial. Further studies are needed to identify characteristics of herds where treating all cows routinely at dry-off may be needed for maintaining good udder health and where switching to selective treatment of cows at dry-off would be the optimal approach to achieve best results.

scholarly journals Hyperketonemia Predictions Provide an On-Farm Management Tool with Epidemiological Insights

Animals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1291
Author(s):  
Ryan S. Pralle ◽  
Joel D. Amdall ◽  
Robert H. Fourdraine ◽  
Garrett R. Oetzel ◽  
Heather M. White
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Milk Yield ◽  
Milk Fat ◽  
Somatic Cell Count ◽  
Past Research ◽  
Management Tool ◽  
Milk Analysis ◽  
Linear Regression Models ◽  
High Throughput Detection

Prediction of hyperketonemia (HYK), a postpartum metabolic disorder in dairy cows, through use of cow and milk data has allowed for high-throughput detection and monitoring during monthly milk sampling. The objective of this study was to determine associations between predicted HYK (pHYK) and production parameters in a dataset generated from routine milk analysis samples. Data from 240,714 lactations across 335 farms were analyzed with multiple linear regression models to determine HYK status. Data on HYK or disease treatment was not solicited. Consistent with past research, pHYK cows had greater previous lactation dry period length, somatic cell count, and dystocia. Cows identified as pHYK had lower milk yield and protein percent but greater milk fat, specifically greater mixed and preformed fatty acids (FA), and greater somatic cell count (SCC). Differential somatic cell count was greater in second and fourth parity pHYK cows. Culling (60d), days open, and number of artificial inseminations were greater in pHYK cows. Hyperketonemia prevalence decreased linearly in herds with greater rolling herd average milk yield. This research confirms previously identified risk factors and negative outcomes associated with pHYK and highlights novel associations with differential SCC, mixed FA, and preformed FA across farm sizes and production levels.

Production of hydrogen peroxide by a small molecular mass compound in milk from Holstein cows with high and low milk somatic cell count

2008 ◽  
Vol 75 (3) ◽  
pp. 335-339 ◽  
Author(s):  
Senkiti Sakai ◽  
Eriko Nonobe ◽  
Takahiro Satow ◽  
Kazuhiko Imakawa ◽  
Kentaro Nagaoka
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Cell Damage ◽  
Bovine Milk ◽  
Developed Countries ◽  
Control Population ◽  
Dairy Herds ◽  
Small Molecular Weight ◽  
Production Of Hydrogen

Mastitis is the most frequent and prevalent production disease in dairy herds in developed countries. Based on a milk somatic cell count (SCC) of either >300 000 or <200 000 cells/ml in this study, we defined the quarter as either inflamed or uninflamed, respectively. The electrical conductivity (EC) of milk was used as an indicator of udder epithelial cell damage. We determined the amount of H2O2produced by utilizing a small molecular weight compound in milk, and examined the characteristics of H2O2production and EC in milk from inflamed and uninflamed quarters. In cows with milk of delivery grade (control population), H2O2production and EC were 3·6±1·3 nmol/ml and 5·4±0·4 mS/cm (mean±sd), respectively. In 37 inflamed quarter milk samples, the production of H2O2was 1·9±1·0 nmol/ml and was significantly smaller than that in the control population (P<0·01). Production of H2O2was moderately but significantly correlated with EC (r<−0·71). In 20 cows with inflamed quarters, the production of H2O2in milk from inflamed quarters was significantly smaller than that in milk from uninflamed quarters (P<0·01). In 18 out of 20 cows, milk from inflamed quarters showed the smallest H2O2production among all tested quarters in each cow. We conclude that inflammation caused a decrease in H2O2production in milk. In this study, we present parameters for evaluating the lactoperoxidase/H2O2/thiocyanate antibacterial defence system in bovine milk.

scholarly journals Farm business and operator variables associated with bulk tank somatic cell count from dairy herds in the southeastern United States

2017 ◽  
Vol 100 (11) ◽  
pp. 9298-9310 ◽  
Author(s):  
Karen L. DeLong ◽  
Dayton M. Lambert ◽  
Susan Schexnayder ◽  
Peter Krawczel ◽  
Mark Fly ◽  
...  
Keyword(s):  
United States ◽  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Southeastern United States ◽  
Dairy Herds ◽  
Bulk Tank ◽  
Farm Business

Relationship of somatic cell count with milk yield and composition in Holstein and Romanian Spotted cow crossbreed population

2011 ◽  
Vol 22 ◽  
pp. S96 ◽  
Author(s):  
Lucian Ionel Ilie ◽  
Anca Maria Galis ◽  
Laurentiu Tudor
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Milk Yield ◽  
Somatic Cell Count ◽  
Relationship Of
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