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Distribution of antibodies against Neospora caninum, BVDV and BHV-1 among cows in brazilian dairy herds with reproductive disorders.
(2006-10-01)
Neospora caninum, bovine viral diarrhea virus (BVDV) and bovine herpes virus 1 (BHV-1) are worldwide spread pathogens associated with reproductive problems in cattle. The present work aimed to observe the infection pattern ...
Distribution of antibodies against Neospora caninum, BVDV and BHV-1 among cows in brazilian dairy herds with reproductive disorders.
(2006-10-01)
Neospora caninum, bovine viral diarrhea virus (BVDV) and bovine herpes virus 1 (BHV-1) are worldwide spread pathogens associated with reproductive problems in cattle. The present work aimed to observe the infection pattern ...
Effect of milk production on reproductive performance in dairy herds
(American Dairy Science Association, 2018-05-23)
The objective of the present study was to assess the relationship between individual cow milk yield and fertility, accounting for the contextual effect of the herd. A dataset including 657,968 lactations from 677 dairy ...
Bulk tank milk selenium concentration in dairy herds from Southern Chile and its relationship to productive performance
(UNIV AUSTRAL CHILE. FAC CIENCIAS VETERINARIAS, 2013)
Bovine leukemia virus becomes established in dairy herds before the first lactation
(2016)
In this work, we studied seven groups of pregnant heifers from a consortium of dairy farms heavily infected with bovine leukemia virus (BLV). ELISA testing showed that the seroprevalence ranges of BLV in heifers between ...
Cow and herd predictors of udder health status in a random sample of argentinian dairy herds
(Universidad de Buenos Aires. Facultad de Ciencias Veterinarias, 2017-11)
The objective of this observational study was to evaluate the relationship between cow- and herd-level factors and cow udder health status, measured by composite milk sample somatic cell count (CSCC) in dairy herds from ...
Bovine respiratory syncytial virus seroprevalence and risk factors in non-vaccinated dairy cattle herds in Brazil
(2018-06-27)
Background: The cattle industry is one of the most important Brazilian agribusiness sectors and is a strong contributor to the national economy. Annually about 44.6 million calves are bred, which makes the optimal management ...
Bovine rotavirus strains circulating in beef and dairy herds in Argentina from 2004 to 2010
(Elsevier, 2012-08-17)
Bovine Group A Rotavirus (RVA) is one of the main causes of neonatal calf diarrhea worldwide. The present study reports the genotyping of bovine RVA strains circulating in Argentinean cattle from 2004 to 2010. Additionally, ...
Variance heterogeneity for milk yield in Brazilian and Colombian Holstein herds
(2004-04-01)
Heterogeneity of variances for milk yield (MY) was determined for Brazilian and Colombian herds. The herds were grouped as high or low variability within each country, using as criterion the phenotypic standard deviation ...