scholarly journals Status of claw recordings and claw health in Danish dairy cattle from 2013 to 2017

2021 ◽  
Vol 277 ◽  
pp. 105749
Author(s):  
N. Capion ◽  
P. Raundal ◽  
L. Foldager ◽  
P.T. Thomsen
Keyword(s):  
Dairy Cattle ◽  
Danish Dairy

Milk protein polymorphism in Danish dairy cattle and the influence of genetic variants on milk yield

1990 ◽  
Vol 57 (1) ◽  
pp. 53-62 ◽  
Author(s):  
Anne-Marie Bech ◽  
K. Rotvig Kristiansen
Keyword(s):  
Dairy Cattle ◽  
Milk Fat ◽  
Milk Protein ◽  
Gene Frequencies ◽  
Black And White ◽  
Milk Samples ◽  
Yield Parameters ◽  
Jersey Cows ◽  
Β Lactoglobulin ◽  
Danish Dairy

SummaryIn milk samples from 549 cows of the breeds Danish Jersey, Red Danish Dairy Cattle (RDM), and Black and White Danish Dairy Cattle (SDM) the genetic polymorphisms of the αs1, β and K-cascin and β-lactoglobulin (β-Lg) loci were determined by isoelectric focusing in agarose gels. The results of the screening were comparcd with results obtained by Larsen & Thymann (1966). In addition, the genetic linkage of the three casein loci was studied, and the association between milk protein genotypes and yields in first and second lactations of milk, fat and protein were investigated.The distribution of genotypes of all four milk protein Systems was different from breed to breed.For Jersey cows, significant differences in the gene frequencies from the results of the 1966 investigation were found for αs1 and K-casein and β-Lg. For SDM cows a change in the K-casein frequency had occurred whereas for RDM cows no changes were found.Linkage between some of the casein loci was found within ail three breeds. For the RDM breed the possible linkage between αs1-casein and the other caseins could not be tested bccause nearly ail thc cows were homozygous for the αs1-cascin-B genotypes.β-Casein genotypes were associated with yield parameters in ail breeds. The A2A2 genotype of this protein gave higher yields of milk, fat, and protein in the second lactation than thc A1A1 genotype.

scholarly journals Increased incidence rate of undesired early heifer departure in Mycoplasma bovis-antibody positive Danish dairy cattle herds

2019 ◽  
Vol 166 ◽  
pp. 86-92 ◽  
Author(s):  
Mette Bisgaard Petersen ◽  
Annette Kjær Ersbøll ◽  
Kaspar Krogh ◽  
Liza Rosenbaum Nielsen
Keyword(s):  
Dairy Cattle ◽  
Incidence Rate ◽  
Mycoplasma Bovis ◽  
Cattle Herds ◽  
Danish Dairy

scholarly journals Estimation of genetic parameters and heterosis for longevity in crossbred Danish dairy cattle

2017 ◽  
Vol 100 (8) ◽  
pp. 6337-6342 ◽  
Author(s):  
J.B. Clasen ◽  
E. Norberg ◽  
P. Madsen ◽  
J. Pedersen ◽  
M. Kargo
Keyword(s):  
Dairy Cattle ◽  
Genetic Parameters ◽  
Danish Dairy ◽  
Estimation Of Genetic Parameters

scholarly journals Farm-level risk factors for Fasciola hepatica infection in Danish dairy cattle as evaluated by two diagnostic methods

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
Nao Takeuchi-Storm ◽  
Matthew Denwood ◽  
Tina Vicky Alstrup Hansen ◽  
Tariq Halasa ◽  
Erik Rattenborg ◽  
...  
Keyword(s):  
Risk Factors ◽  
Dairy Cattle ◽  
Fasciola Hepatica ◽  
Diagnostic Methods ◽  
Hepatica Infection ◽  
Farm Level ◽  
Danish Dairy

scholarly journals Transmission Dynamics of Corynebacterium spp. Within Two Danish Dairy Cattle Herds

2021 ◽  
Vol 8 ◽  
Author(s):  
Carsten Kirkeby ◽  
Tariq Halasa ◽  
Michael Farre ◽  
Galal Nazih Chehabi ◽  
Kaare Græsbøll
Keyword(s):  
Dairy Cattle ◽  
Transmission Rate ◽  
Cost Effective ◽  
Control Measures ◽  
Transmission Dynamics ◽  
Effective Control ◽  
Indirect Transmission ◽  
The Mean ◽  
Cattle Herds ◽  
Danish Dairy

Intramammary infections (IMI) can cause mastitis, a prevalent and costly infectious disease in dairy cattle worldwide. The IMI is caused by a range of bacteria, including Corynebacterium spp. Knowledge of the transmission dynamics of pathogens is generally sparse but essential to support decision-making; such as input to bioeconomic models. In this observational study, we explored the transmission dynamics of Corynebacterium spp. in two different Danish dairy cattle herds by testing monthly quarter-level milk samples of all lactating cows for 1 year. We estimated the prevalence for herd 1 and 2 to 24 and 11.7%, respectively, and the mean quarter-level incidence to be 8 and 6.5% per month, respectively. We compared a model for indirect transmission via the environment with a model with the direct contagious transmission and found that the latter model best explained the data. We estimated the daily mean quarter-level transmission rate to be 0.016 and 0.018 cases/quarter-day for herd 1 and 2, respectively. The mean recovery rate was 0.012 and 0.016 for herd 1 and 2, respectively. Consequently, the basic reproduction number for herd 1 and 2 was 1.27 and 1.10, respectively. This study highlights that Corynebacterium spp. can be prevalent within a herd and transmit directly between cows. Thus, future studies should investigate cost-effective control measures against Corynebacterium spp.

scholarly journals Determinants of antimicrobial treatment for udder health in Danish dairy cattle herds

2018 ◽  
Vol 101 (1) ◽  
pp. 505-517 ◽  
Author(s):  
Maya Gussmann ◽  
Kaare Græsbøll ◽  
Nils Toft ◽  
Søren S. Nielsen ◽  
Michael Farre ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Antimicrobial Treatment ◽  
Udder Health ◽  
Cattle Herds ◽  
Danish Dairy
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