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

Rasmussen, Philip

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

dc.contributor.advisor	Hall, David C.
dc.contributor.author	Rasmussen, Philip
dc.contributor.committeemember	Barkema, Herman W.
dc.contributor.committeemember	Beaulieu, Eugene
dc.contributor.committeemember	Mason, Steve
dc.date	2021-06
dc.date.accessioned	2021-02-24T15:26:19Z
dc.date.available	2021-02-24T15:26:19Z
dc.date.issued	2021-02-19
dc.description.abstract	Johne’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.citation	Rasmussen, 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.doi	http://dx.doi.org/10.11575/PRISM/38652
dc.identifier.uri	http://hdl.handle.net/1880/113113
dc.language.iso	eng	en_US
dc.publisher.faculty	Veterinary Medicine	en_US
dc.publisher.institution	University of Calgary	en
dc.rights	University 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.subject	MAP	en_US
dc.subject	Paratuberculosis	en_US
dc.subject	Johne's disease	en_US
dc.subject	Vaccination	en_US
dc.subject	Testing and culling	en_US
dc.subject	Control practice	en_US
dc.subject	Markov chain	en_US
dc.subject	Monte Carlo	en_US
dc.subject	Economic analysis	en_US
dc.subject.classification	Economics	en_US
dc.subject.classification	Epidemiology	en_US
dc.title	The economic impact of Johne’s disease (paratuberculosis) in dairy cattle	en_US
dc.type	doctoral thesis	en_US
thesis.degree.discipline	Veterinary Medical Sciences	en_US
thesis.degree.grantor	University of Calgary	en_US
thesis.degree.name	Doctor of Philosophy (PhD)	en_US
ucalgary.item.requestcopy	true	en_US