The Development of a Bovine Leukemia Virus Control Program

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dc.contributor.advisorvan der Meer, Frank
dc.contributor.authorKuczewski, Alessa Evelyn Traute
dc.contributor.committeememberOrsel, Karin
dc.contributor.committeememberBarkema, Herman W.
dc.contributor.committeememberMason, Steve
dc.contributor.committeememberErskine, Ronald J.
dc.contributor.committeememberFourichon, Christine
dc.contributor.committeememberLashewicz, Bonnie M.
dc.date.accessioned2019-12-16T22:18:02Z
dc.date.available2019-12-16T22:18:02Z
dc.date.issued2019-12-13
dc.description.abstractNorth American dairy herds are commonly infected with bovine leukemia virus (BLV), with production-limiting effects, reduced animal welfare and consumer concerns. The overall goal of this thesis was the development of an adaptable on-farm BLV control program. To summarize important background knowledge and understand all aspects of BLV control, I performed the following: 1) Available literature concerning BLV transmission and control was reviewed and summarized. 2) Five commercially available ELISA were evaluated and compared, using 160 serum samples from Alberta cattle. 3) Economic impacts of BLV and its control were evaluated by creating an economic model of an average Alberta dairy farm. 4) Motivators and barriers for Alberta dairy farmers to change behavior on farm and implement BLV control measures were investigated by analyzing conversations with farmers as well as veterinarians. 5) In those conversations, dairy farmers’ and veterinarians’ opinions toward various BLV control measures were sought to adjust the BLV control program. 6) Based on findings, a risk assessment tool was designed to identify and weigh on-farm behavior that could cause transmission of BLV between animals. When this risk assessment tool was used on 11 Alberta dairy farms, its results, in combination with serum test results, led to the recommendation of tailored best-management practices aimed at preventing BLV transmission between animals. Implementation, within-herd prevalence, and seroconversions were measured. 7) Finally, all findings were summarized and discussed. In conclusion, recommendations for BLV control have not changed over a long interval, as general principles remain relevant. Additionally, identification of BLV-infected animals is easy and reliable. Although BLV control relies on financial investments, it has an overall economic net benefit. Motivating farmers to implement BLV control is dependent on knowledge and control measures considered feasible by the farmer. Finally, implementation of on-farm BLV control reduced within-herd BLV prevalence for the majority of participating farms.en_US
dc.identifier.citationKuczewski, A. E. T. (2019). The Development of a Bovine Leukemia Virus Control Program (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/37342
dc.identifier.urihttp://hdl.handle.net/1880/111351
dc.language.isoengen_US
dc.publisher.facultyVeterinary Medicineen_US
dc.publisher.institutionUniversity of Calgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.subjectbovine leukemia virusen_US
dc.subjectBLVen_US
dc.subjectbovine leukosisen_US
dc.subjectdairy industryen_US
dc.subjectcontrol programen_US
dc.subjectELISAen_US
dc.subjectcomparisonen_US
dc.subjectevaluationen_US
dc.subjectfarm economicsen_US
dc.subjecteconomic evaluationen_US
dc.subjecton-farm changeen_US
dc.subjectmotivationen_US
dc.subjectfarmer motivationen_US
dc.subject.classificationEducation--Social Sciencesen_US
dc.subject.classificationEconomicsen_US
dc.subject.classificationVeterinary Scienceen_US
dc.subject.classificationEpidemiologyen_US
dc.titleThe Development of a Bovine Leukemia Virus Control Programen_US
dc.typedoctoral thesisen_US
thesis.degree.disciplineVeterinary Medical Sciencesen_US
thesis.degree.grantorUniversity of Calgaryen_US
thesis.degree.nameDoctor of Philosophy (PhD)en_US
ucalgary.item.requestcopytrueen_US
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