Preventive Veterinary Medicine
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Spatio-temporal epidemiology of highly pathogenic avian influenza (H5N1) outbreaks in Nigeria, 2006-2008.
We described the spatio-temporal patterns of the HPAI H5N1 outbreaks in Nigeria. Data of suspected and laboratory confirmed outbreaks maintained at the National Veterinary Research Institute Vom was analyzed using descriptive and exploratory analyses, GIS mapping, global and local spatial statistica...
Estimation of sensitivity, specificity and predictive values of two serologic tests for the detection of antibodies against Actinobacillus p...
Latent-class models were used to determine the sensitivity, specificity and predictive values of a polyclonal blocking enzyme-linked immunosorbent assay (ELISA) and a modified complement-fixation test (CFT) when there was no reference test. The tests were used for detection of antibodies against Act...
Establishment and maintenance of a longitudinal study of bovine spongiform encephalopathy (the ULiSES scheme).
This paper addresses the issues of tracing and compliance encountered in setting up and maintaining a UK-wide 5-year observational study of beef cattle. The 5-year prospective study was initiated in 1997 to investigate the occurrence of bovine spongiform encephalopathy (BSE) in a single herd of pedi...
Participatory diagnosis of a chronic wasting disease in cattle in southern Sudan.
In southern Sudan, livestock keepers identified a chronic wasting disease in adult cattle as one of their most-serious animal-health problems. Participatory-appraisal (PA) methods and conventional veterinary-investigation methods were used to characterise the chronic wasting disease and identify lin...
The reproductive performance of sows raised by smallholder farmers in the Philippines.
We conducted a cross-sectional study at two sites in the Philippines to obtain baseline information about the reproductive performance of smallholder sows, and to identify important constraints and opportunities for smallholder pig raisers. Using an interview-based questionnaire, we collected data a...
From 'ecopathology' to 'agroecosystem health'.
The 'epidemiologic revolution' of the 1960s arose in response to the inability of reductionist methods to provide practical solutions to the complex problems of health and production in livestock systems. In a farm, there are not only interactions between animal factors and herd husbandry factors su...
A Cox proportional-hazards model with time-dependent covariates to evaluate the relationship between body-condition score and the risks of f...
The objective of this study was to determine the relationship between body-condition score and postpartum reproductive efficiency in dairy cattle. Data on body-condition score, reproduction, diseases, and production from 1404 lactations of 639 cows, calving between January 1984 and November 1996 on...
Using a tobit regression model to analyse risk factors for foot-pad dermatitis in commercially grown broilers.
A model was developed to explain the influence of different local and regional factors on the prevalence of foot-pad dermatitis in broilers at the time of slaughter. Data from a recent two-year study of broiler foot-health in Sweden were used to construct the model. The model was based on regression...
Temporal and spatial patterns of African swine fever in Sardinia.
Temporal patterns and spatial distribution of African swine fever (ASF) were studied through the analysis of routinely collected data in the ASF-endemic area of the Province of Nuoro, Sardinia. During 1993-1996, ASF outbreaks were reported from 45 out of the 82 municipalities of the study area. Over...
Evaluation of an enrofloxacin-treatment program against Mycoplasma gallisepticum infection in broilers.
Three chicken broiler breeder flocks, 7 months of age, were confirmed to have Mycoplasma gallisepticum (MG) infection, based on culture of tracheal swabs. A total of fifty-five 7-day-old embryos from the three MG-positive flocks had an average 27.4% prevalence of MG-infection in their vitelline memb...