The economic impact of Johne’s disease (paratuberculosis) in dairy cattle

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dc.contributor.advisorHall, David C.
dc.contributor.authorRasmussen, Philip
dc.contributor.committeememberBarkema, Herman W.
dc.contributor.committeememberBeaulieu, Eugene
dc.contributor.committeememberMason, Steve
dc.date2021-06
dc.date.accessioned2021-02-24T15:26:19Z
dc.date.available2021-02-24T15:26:19Z
dc.date.issued2021-02-19
dc.description.abstractJohne’s disease (JD), or paratuberculosis, is an infectious inflammatory disorder of the intestines primarily associated with domestic and wild ruminants including dairy cattle. The disease, caused by an infection with Mycobacterium avium subspecies paratuberculosis (MAP) bacteria, burdens both animals and producers through reduced milk production, premature culling, and reduced salvage values among MAP-infected animals. The main objectives of this thesis were to estimate the economic impact of MAP infection and potential control practices across a comprehensive selection of dairy-producing regions within a single methodological framework. Additional objectives were to estimate the value of JD control to Canadian dairy producers and to what degree there are economic premiums associated with MAP-negative dairy replacements. Using a combination of Markov Chain Monte Carlo (MCMC) simulation methods, regression analysis, and compensating and equivalent variation analysis, the following results were generated: 1) approximately 1% of gross milk revenue, equivalent to CA$43 (US$33) per cow, is lost annually in MAP-infected dairy herds, with those losses primarily driven by reduced production and being higher in regions characterized by above-average farm-gate milk prices and production per cow; 2) vaccination was the most promising type of JD control practice modelled, with dual-effect vaccines (reducing shedding and providing protective immunity) resulting in BCRs between 1.48 and 2.13 in Canada and a break-even period of between 6.17 and 7.61 years; 3) assuming a within-herd prevalence of 10% and a 50% reduction of that prevalence over 10 years, JD control has an estimated annual value of CA$28 per cow for the average Canadian dairy producer; and 4) MAP-negative replacements are associated with an average benefit of CA$96 per purchase in major dairy-producing regions, equivalent to a premium of 13% of aggregated replacement prices.en_US
dc.identifier.citationRasmussen, P. (2021). The economic impact of Johne’s disease (paratuberculosis) in dairy cattle (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/38652
dc.identifier.urihttp://hdl.handle.net/1880/113113
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.subjectMAPen_US
dc.subjectParatuberculosisen_US
dc.subjectJohne's diseaseen_US
dc.subjectVaccinationen_US
dc.subjectTesting and cullingen_US
dc.subjectControl practiceen_US
dc.subjectMarkov chainen_US
dc.subjectMonte Carloen_US
dc.subjectEconomic analysisen_US
dc.subject.classificationEconomicsen_US
dc.subject.classificationEpidemiologyen_US
dc.titleThe economic impact of Johne’s disease (paratuberculosis) in dairy cattleen_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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