Publications

survey of mycobacterium avium subspecies paratuberculosis serological status in beef herds on community pastures in saskatchewan.	johne's disease is a well recognized problem in dairy herds. relatively little information is available on either the prevalence or the control of johne's disease in commercial cow-calf operations. in the fall of 1999, blood samples were collected during pregnancy testing from cows on community pastures in saskatchewan. sera from these cows were analyzed using a commercial elisa for antibodies to mycoplasma avium subspecies paratuberculosis. all cows from each herd examined at the community past ...	2002	12125186
seroprevalence of antibodies against bovine leukemia virus, bovine viral diarrhea virus, mycobacterium avium subspecies paratuberculosis, and neospora caninum in dairy cattle in saskatchewan.	blood was drawn from 1530 dairy cows in 51 herds. for antibodies against bovine leukemia virus, mycobacterium avium subspecies paratuberculosis, and neospora caninum, 37.4%, 2.7%, and 5.6% of cows were test positive, respectively, while 29.2% of herds had unvaccinated animals with > or = 1:64 for bovine viral diarrhea virus.	2005	15759829
attitudes of canadian dairy farmers toward a voluntary johne's disease control program.	the success of johne's disease (jd) control programs based on risk assessment (ra) depends on producers' compliance with suggested management practices. one objective of this study was to describe the perception of participating canadian dairy farmers of the impact of jd, the ra process, and suggested management strategies. the second objective was to describe the cost of changes in management practices following the ra. a telephone survey was conducted with 238 dairy farmers in ontario, manitob ...	2010	20338426
high herd-level prevalence of mycobacterium avium subspecies paratuberculosis in western canadian dairy farms, based on environmental sampling.	mycobacterium avium subspecies paratuberculosis (map) causes chronic progressive enteritis in ruminants. the pathogen is present in most countries with modern dairy production, causing substantial economic losses for the industry. the objectives of this study were to estimate dairy herd prevalence of map in the western canadian provinces of alberta and saskatchewan, and to determine whether herd size and housing system (tie-stall versus freestall or loose housing) affected the risk of a herd tes ...	2014	25151881
sampling location, herd size, and season influence mycobacterium avium ssp. paratuberculosis environmental culture results.	mycobacterium avium subspecies paratuberculosis (map), the etiologic agent of johne's disease, a chronic progressive enteritis, is a common pathogen on dairy farms. environmental sampling is frequently used to detect map-infected herds, because it does not require sample collection from individual animals. the objectives were to determine (1) location-specific odds of map-positive environmental sampling results and whether season or herd size affect results; (2) whether season and herd size affe ...	2015	25465568