Results

1 - 25 of 315
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
A national surveillance programme for Salmonella Dublin, based on regular bulk-tank milk antibody screening and movements of cattle, was initiated in Denmark in 2002. From 2002 to end of 2009 the prevalence of test-positive dairy herds was reduced from 26% to 10%. However, new infections and spread ...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The objective of the study was to evaluate the ability of an estimate of the herd intramammary infection (IMI) incidence rate computed using repeated somatic cell count (SCC) measurements (quarter- and composite-SCC; hereafter, the SCC-derived herd IMI incidence, SCCI)to predict the incidence rate c...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Observational studies are prone to two types of errors: random and systematic. Random error arises as a result of variation between samples that might be drawn in a study and can be reduced by increasing the sample size. Systematic error arises from problems with the study design or the methods used...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Objective: To compare the owner-reported prevalence of behavioral characteristics in dogs obtained as puppies from pet stores with that of dogs obtained as puppies from noncommercial breeders. Design: Cross-sectional study. Animals-Dogs obtained as puppies from pet stores (n = 413) and breeder-obtai...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Salmonella Dublin infections reduce gross margins and compromise animal health and welfare in dairy cattle herds. Despite on-going control efforts in several countries the duration and risk factors of a persistent infection have been difficult to study due to a lack of suitable data. This study util...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
A letter to the editor is presented in response to the article "Differences in behavioral characteristics between dogs obtained as puppies from pet stores and those obtained from noncommercial breeders" that was published in the previous issue and also presents response from authors.
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The objective of the study was to explore the relationship between herd dry period (DP) intramammary infection (IMI) incidence and elimination rates. A cohort of 91 Canadian dairy herds was recruited and followed in 2007 and 2008. Universal dry cow therapy was widely adopted among the participating ...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The objective of the study was to evaluate the predictive ability of the herd dry period (DP) intramammary infection (IMI) incidence and elimination rates derived from predry and postcalving somatic cell count (SCC) measurements [quarter-level SCC and dairy herd improvement (DHI) composite-level SCC...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
This study was conducted to evaluate the association between subclinical intramammary infection (IMI) with coagulase-negative staphylococci (CNS), mammary quarter milk somatic cell count (SCC), and persistence of IMI in dairy cattle. Convenience samples of CNS isolates harvested from milk samples of...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Five serological assays: the buffered plate antigen test, the standard tube agglutination test, the complement fixation test, the hemolysis-in-gel test and the indirect enzyme immunoassay were diagnostically evaluated. Test data consisted of results from 1208 cattle in brucellosis-free herds, 1578 c...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Factors which influence somatic cell counts in bovine milk are reviewed and guidelines for their interpretation are presented. It is suggested that the thresholds of 300 000 and 250 000 cells/ml be used to identify infected quarters and cows respectively. However, it is stressed that somatic cell co...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
OBJECTIVE: To determine anatomic patterns and clinical importance of increased radiopharmaceutical uptake in bones of horses used for show jumping, hunting, and eventing. DESIGN: Retrospective study. ANIMALS: 141 horses evaluated because of lameness. PROCEDURE: Medical records were reviewed, and inf...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
A mail survey of Canadian sheep flocks registered on the Record of Performance program was conducted, and the association of management practices and diseases with productivity was studied using multiple regression techniques. The relationships between management practices and diseases of lambs whic...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Regression analysis was used to determine the ability of a number of biological parameters to predict economic efficiency. Detailed feed, financial, and production records were maintained by a random sample of eighteen Prince Edward Island (PEI) swine producers (each producing over 1000 market hogs ...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The pharmacokinetic parameters of erythromycin in foals were determined following intravenous administration of 5.0 mg/kg to animals aged 1, 3, 5 and 7 weeks. The distribution of the drug was described by a two-compartment open model, and no significant differences were observed between coefficients...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Data from 1565 milk samples collected weekly from the University of Guelph mastitis research herd were used to evaluate somatic cell counts (SCC) as a screening test for prevalent intramammary infections. Changes in SCC were evaluated as a screening test for incident infections. The sensitivity and ...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Path analysis was used to determine the interrelationships between postpartum administration of gonadotrophin releasing hormone and cloprostenol and the occurrence of reproductive disease and reproductive performance in dairy cows. The data analysed were those collected on 226 Holstein-Friesian cows...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Criteria for diagnosing intramammary infections (IMI) have been debated for many years. Factors that may be considered in making a diagnosis include the organism of interest being found on culture, the number of colonies isolated, whether or not the organism was recovered in pure or mixed culture, a...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
A case-control study was conducted to compare the physical hoof properties of digits responsible for clinical lameness with those of other digits on the same cows and with those of equivalent digits on non-lame control cows. The control cows were herd-mates matched by age, breed and stage of lactati...