Showing papers in "Preventive Veterinary Medicine in 1997"

TL;DR: The similar findings in the two studies provide evidence in favour of a causal association between the use of avoparcin and the occurrence of VREF on farms, and suggest that food animals constitute a potential reservoir of infection for VREF in humans.

TL;DR: A number of techniques for dealing with multicollinearity are discussed and a dataset from a recent study of risk factors for pneumonia in swine is demonstrated using a dataset used in this paper.

TL;DR: Field and experimental results supporting the fact that as a result of the induction of abortion in pregnant animals and the low degree of immunity conferred, reduced doses of Rev 1 should not be recommended as an alternative to the full standard doses are reviewed.

TL;DR: A nation-wide Salmonella enterica surveillance and control programme was initiated in Danish finishing herds over the first quarter of 1995, and the proportion of serologically positive meat-juice samples collected during 1995 ranged from a mean of 2.9% in smaller herds to 6.1% in relatively large herds (more than 5000 swine slaughtered per year).

TL;DR: A Clinician's Guide to Statistics and Epidemiology in Mental HealthStatistical Tools for Epidemiologic ResearchMeasurement Error and Misclassification in Statistics and epidemiologyEpidemiology and GeographyStatistical Methods in Epidemiology as mentioned in this paper.

TL;DR: A method of classification of broiler foot-health status was developed to estimate the prevalence of foot-pad dermatitis in Swedish broilers and found that flocks reared in houses equipped with small water cups had significantly (P < 0.05) higher prevalences ofFoot health in commercial broiler flocks at slaughter was affected by rearing conditions and equipment.

TL;DR: The author discusses how she and her husband are concerned about the future of their fertility and the challenges they are facing in trying to find a solution to this problem.

TL;DR: Results showed that metabolic events associated with energy insufficiency-increased fat mobilization and serum lipoprotein metabolism-were related to increased risk of metritis and retained placenta, and higher energy consumption during the last weeks of the dry period might reduce disease risk at parturition.

TL;DR: Overall, very low specific mortality rates were observed in the study, however, the conditions that were associated with mortality resulted in fairly high case fatalities.

TL;DR: Investigation of bovine tuberculosis dynamics within cattle herds in New Zealand suggests that the caudal fold test is a realistic measure of herd Tb status and that Tb is unlikely to persist in herds under current testing practices in the absence of anergic cattle or an external source of infection.

TL;DR: Geldings and equids provided group drinking water from sources other than tanks, buckets and automatic waterers were significantly associated with reduced risk of colic, and risk factors associated with significantly increased likelihood of developing colic were foaling during the study, deworming during theStudy, increased age, and participation in showing activities.

TL;DR: PDD-affected animals produced less milk than healthy cows, but the difference was not statistically significant in the multiple regression.

TL;DR: The data collected by a postal questionnaire sent to 3772 randomly selected dairy farmers in England and the border regions in Wales were used to estimate the relationships between the presence of clinical Johne's disease and farm and management factors associated with that disease.

TL;DR: Social cost-benefit analysis was applied to the economic evaluation of the bovine brucellosis and bovines tuberculosis eradication programmes carried out by the public eradication authority for mountain areas in the Spanish Central Pyrenees and resulted in unfavourable outcomes.

TL;DR: Risk factors for musculoskeletal injury in racing Thoroughbreds were investigated in a case-control study conducted at racetracks administered by the Australian Jockey Club and there was no significant difference between tracks or significant association with track condition.

TL;DR: Commercial herds, presence of clinical signs typical of paratuberculosis in animals, and exposure of calves 0-6 weeks old to feces of adult cows all indicate a higher likelihood that a herd is infected with M. paratubculosis.

TL;DR: Results of a cross-sectional serological study on smallholder dairy farms in Murang's District serve as indicators of the possible existence of endemic stability in some AEZs for some parasites.

TL;DR: Data from the United States National Swine Survey collected by the National Animal Health Monitoring System were used to describe the use of feed additives in swine feeds and penicillin was used according to its label most often.

TL;DR: The results suggest that subclinical OLV infection has important detrimental effects on sheep production which occur in cumulative fashion from breeding through weaning and that OLV control efforts may be financially justified in some sheep flocks.

TL;DR: Routine monitoring of abortions is carried out on most Israeli Kibbutz dairy herds and results are produced in the form of abortions per 10000 cows-days-at risk, proportion of aborted cows by 260 days of gestation, abortion per confirmed pregnancy, and adjusted odds ratios.

TL;DR: The value of validating questionnaires before their use in epidemiologic research is confirmed, as the lack of clear wording and the absence of definitions for technical terms appeared to reduce validity in biosecurity surveys.

TL;DR: Season of birth was significantly associated with cumulative mortality incidence risk, and mortality risk was highest in the periods January to March and October to December.

TL;DR: The prevalence of Cryptosporidium was higher in calves less than 3 months of age compared to weaned calves and adults, and there was a significantly higher prevalence of oocyst shedding in diarrhoeic than in non-diarrhoeic animals.

TL;DR: The maintenance of ASFV in Sardinia was primarily associated with free-range pig farms, and the natural logarithm of the number of pigs tested per visit in a farm was positively associated with the risk of herd seropositivity.

TL;DR: Housing pre-weaned calves in hutches or separate calf buildings in either season was associated with an increased risk of BLV, while the model containing winter housing variables included positive associations between contact with older animals and BLV status, and betweenBLV status and the facilities used to house dry cows in the winter.

TL;DR: The proximity of farms to badger setts was compared between farms that had experienced a tuberculosis breakdown and those that had not, over the 6 year period from 1988 to 1993, and the relationship was not strong, and explained only 9-19% of tuberculosis breakdowns.

TL;DR: Multivariable logistic regression indicated that feeding tallow and feeding whole cottonseed or cottonseed hulls within seven days prior to fecal sample collection was associated with an increased risk of finding Salmonella in a pen.

TL;DR: The relative variability of the sero-prevalence of antibodies to infectious bovine rhinotracheitis (IBR) due to cow, farm, and agroecological area levels were investigated for three contrasting districts in Kenya and models in MLn were extended to allow for multiple farm-level variance components by these categories.