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The objective of this paper is to describe the 1000 head grower/finisher swine research unit and how it addresses the research needs associated with the growing and finishing phases of pork production, including integration of manure studies with studies of other production variables. The facility u...
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A case of ketosis in a pregnant sow presented for caesarian delivery is described. In the last few weeks of gestation the sow had been anorexic, and had elevated liver enzymes, ketonuria, and mild ketonaemia. The sow was slaughtered after the litter was delivered. Porcine ketosis can be prevented by...
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Two hundred gilts and 200 barrows, housed within sex in pens of 25, were randomly allotted to two replications of four dietary treatments to determine the effects of incorporating 30, 20, 10 or 0% extruded soybeans (ESB), displacing a commercial protein supplement, in barley-based grower and finishe...
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Enzootic Glasser's disease was investigated to study the epidemiology of the disease strains on a farm where it presented a problem. Restriction endonuclease fingerprinting (REF) analysis technique was used, as all strains of Haemophilus parasuis are biochemically similar and many strains are bioche...
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Despite the application of hazard analysis and critical control point systems at slaughter and during processing, Salmonella contamination is still a significant biological hazard associated with pork products. A better understanding of risk factors in slaughterhouses and of contamination sources is...
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Freedom from infection modeling, using scenario trees, has become an established methodology and is well described in the literature. However, standards for organizing and reporting the surveillance information incorporated into such models are less developed. Canada has been routinely testing for T...
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A rapid gross visual appraisal of enzootic pneumonia lesions was made of 87 lungs at a local abattoir and the lungs were then set aside and examined in more detail. A sample of pulmonary tissue was taken from each lung and submitted for bacterial and histological examination. The principal investiga...
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The factors (farm type descriptions) obtained from a previous factor analysis study were analysed using regression with prevalence estimates of enzootic pneumonia on 69 pig farms. Farms were divided on enzootic pneumonia prevalence greater or less than 10%. Multiple logistic regression analysis of t...
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The impact of Ascaris suum infections on swine production is discussed under the following headings: background; clinical disease; economic losses; monitoring of ascariasis..
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This study used multivariable analysis to describe the role of the environment in respiratory disease of pigs. Environmental effects acting on pigs were assessed by visiting 76 pig farms. Management areas examined were farm size, growth rate, feeding styles and feedstuffs, manure handling and beddin...
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Many studies of health and production problems in livestock involve the simultaneous evaluation of large numbers of risk factors. These analyses may be complicated by a number of problems including: multicollinearity (which arises because many of the risk factors may be related (correlated) to each ...
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We report the methods and findings of a survey of Canadian swine producers summarizing farm-types at-risk of foreign animal disease (FAD) and the routine movement of animals, semen and workers among swine farms, as observed during a 42-day period. Of the 311 producers who returned completed question...
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A photo-activated sound alarm was placed in a specially designed sterile semi-conical sponge tampon and inserted into the vagina of the sow after labour had commenced, or on the day before expected parturition. When the tampon was expelled from the vagina by the first-born piglet and was thus expose...
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Direct and indirect contacts among animal holdings are important in the spread of infectious diseases. The objectives of this study were to describe networks of pig movements and the sharing of trucks used for those movements between swine farms in four Canadian regions using network analysis tools ...
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We evaluated the effects of immunostimulation in the development of postweaning multisystemic wasting syndrome (PMWS) in 930 pigs 53 to 54 d old in a grower/finisher barn with a history of PMWS. The pigs were allocated to 5 treatment groups: 4 groups received a single intramuscular injection of Resp...