Showing papers in "Preventive Veterinary Medicine in 2002"
TL;DR: Significant differences between herds were substantial; the herd-specific, animal-level prevalence of lesions ranged from 25 to 98% and of lameness from 0 to 33%.
250 citations
TL;DR: A sensitivity analysis showed the largest effect on costs was due to milk yield effects, and changing milk production loss from 0 to 5% for BVD increased the costs for the disease by 266%.
216 citations
TL;DR: A two-stage model of disease transmission is hypothesized where TB is maintained at very low prevalence in matriarchal groups, with primary dissemination of the disease attributable to the dispersal and movements of bucks (as well as to the large aggregations of animals created by human activities).
178 citations
TL;DR: A dynamic and stochastic simulation model was developed to evaluate the economic and epidemiological effects of different strategies for control of paratuberculosis in dairy herds and validation with data from 21 infected Dutch dairy farms supported the basic assumptions in the model.
155 citations
TL;DR: The results are consistent with the modified-live vaccine strain spread to other herds by trade with animals and semen and by neighbour (area) transmission and suggest that virus spread by aerosols was a frequent mode of transmission.
146 citations
TL;DR: A 2-year experiment on the effect of claw trimming on hoof health was performed in 77 Swedish dairy herds selected on herd size, breed composition and membership in the official milk-recording scheme, finding that NAT cows had longer and shallower claws than AT cows.
143 citations
TL;DR: A retrospective longitudinal study of metritis was conducted in Denmark on data collected during 1993-1994 on data on herd size, breed, parity, and treatment of disease, and the cow with highest odds of meetingritis was a first or greater than or equal to third parity cow that calved during November-April.
140 citations
TL;DR: The Danish surveillance-and-control program for Salmonella in slaughter pigs was introduced in 1995 and after 5 years, the classification scheme was evaluated--and a revision was made.
134 citations
TL;DR: Neonatal piglets with weights well below the range of most of the litter had an increased risk of dying and were unable to obtain normal weight gains by weaning if they survived, and small piglets had a greater risk for poor survival and weight gain compared to their heavier litter-mates.
133 citations
TL;DR: The literature on camel brucellosis is reviewed and whole-herd vaccination in low-prevalence countries and test-and-slaughter followed by vaccination in high-preVALence countries is suggested.
132 citations
TL;DR: Intensive rearing systems appear to be associated with increased perinatal and postnatal mortality, although housing ewes at lambing was associated with a decreased risk of stillbirth, and large flocks, poor ewe condition at breeding, and flocks with higher ewe-replacement rates were associated with higherPostnatal mortality.
TL;DR: It is concluded that in chicken broilers, implementing a monitoring system based on the observation of foot-pad dermatitis prevalence at slaughter appears to be more appropriate than to legislate stocking density, and in turkey broilers it would probably be necessary to reduce the stocking density drastically or to investigate new systems of floor drainage.
TL;DR: A retrospective study to describe seasonal patterns of leptospirosis diagnosed at veterinary teaching hospitals in the United States and Canada and to determine if occurrence of cases (diagnoses) was associated with rainfall found a significant correlation between number of cases diagnosed and average rainfall recorded 3 months prior to diagnosis.
TL;DR: Two experiments were run in a commercial dairy herd to test the efficacy of topical treatments of digital dermatitis associated with severe heel-horn erosion and a specially designed footbath with two longitudinal compartments was used to study the effectiveness of a solution of acidic ionised copper in preventing or curingdigital dermatitis.
TL;DR: No difference was observed between the prevalence of Campylobacter infections in cats and dogs with diarrhoea and healthy animals, and the dog-data model indicated increased odds of infection with Campyloblacter for dogs
TL;DR: A cross-sectional study determined the prevalence of ecto-, endo- and haemoparasites in free-range chickens from the Goromonzi District, Zimbabwe, and identified the most prevalent nematodes and cestodes.
TL;DR: The results suggest that the "non-outbreaks" farms were significantly more closed than the "outbreak" farms, and direct animal contacts with other cattle should be avoided and professional visitors should be instructed to wear protective clothing before handling cattle.
TL;DR: It is concluded that faecal culture is useful for confirmation but not for screening purposes, emphasising the importance of the composition of a target population before selecting a specific diagnostic test for a given purpose.
TL;DR: Farrowing room management to minimize stillborn risk should target higher-parity females, large litters and optimization of practices of obstetric interventions.
TL;DR: Ethnoveterinary medical practice is widespread among herdsmen and village livestock producers in northern Nigeria and it is likely that additive, synergistic and nutritional effects might be involved in alleviating the problem of ill-health in animals.
TL;DR: The development of a program (implemented in R and S-Plus software) for this purpose that yields maximum-likelihood estimates of sensitivity, specificity and prevalence is described.
TL;DR: Reducing the number of animal movements significantly reduced the size and length of epidemics in areas with high pig density, and the economic consequences of using preventive slaughter rather than emergency vaccination as an additional control measure depended strongly on the reactions of trading partners.
TL;DR: Conventional pigs aged 15-19 and 20-25 weeks in conventional herds had higher haptoglobin concentrations than high-health SPF (SPF-x) pigs of the same age and lame pigs and pigs with tail or ear bite had elevated haPToglobin concentrations.
TL;DR: A more flexible approach is to specify the capabilities of the various tests that can be used to detect the disease, and let the party hoping to demonstrate disease freedom decide upon the testing regime.
TL;DR: Subjective assessment of seasonal calendar scoring patterns by veterinarians indicated that herders' perceptions of seasonal populations of biting flies, ticks and snails were similar to modern veterinary knowledge.
TL;DR: Herd-level sensitivities of bacteriological and serological methods were compared in 79 bovine dairy herds, recently infected with Salmonella enterica subsp.
TL;DR: The results showed that the probability of being ELISA-positive was two to three times lower for cows in parity 1 relative to cows in other parities using both milk and serum ELISA, which is important in the interpretation of ELISA results at cow level with a subsequent tentative diagnosis of paratuberculosis.
TL;DR: The results suggest that changes in several housing factors and management routines might reduce the mortality losses, but the relationship depends on the stage of production.
TL;DR: Serovar Typhimurium phage type 401 and 506 (definitive type 104, DT104) were the most frequently isolated phage types (13 isolates) and clinical signs were seen only among adult cows on most farms.
TL;DR: Investigation of spatial clustering of TB in Argentine cattle herds demonstrated that bovine TB is clustered, and these clusters coincide with dairy cattle production.