A5035027217- Animal Disease Management and Epidemiology
- Animal Behavior and Welfare Studies
- Microbial infections and disease research
- Vector-Borne Animal Diseases
- Mycobacterium research and diagnosis
- Effects of Environmental Stressors on Livestock
- Infectious Diseases and Mycology
- Viral Infections and Immunology Research
- Viral Infections and Vectors
- Genetic and phenotypic traits in livestock
- Animal Nutrition and Physiology
- Viral gastroenteritis research and epidemiology
- Parasite Biology and Host Interactions
- Wildlife Ecology and Conservation
- T-cell and Retrovirus Studies
- Milk Quality and Mastitis in Dairy Cows
- Insect and Pesticide Research
- Human-Animal Interaction Studies
- Tuberculosis Research and Epidemiology
- Helminth infection and control
- Animal Virus Infections Studies
- Plant and Fungal Interactions Research
- Gut microbiota and health
- Reproductive Physiology in Livestock
- Nail Diseases and Treatments
University of Calgary
2016-2025
Dogs Trust
2023
University of Guelph
2022
Alberta Health Services
2022
Government of Nunavut
2015
University of Saskatchewan
2015
Ross University School of Veterinary Medicine
2015
Utrecht University
2002-2009
Geneeskundige en Gezondheidsdienst
2000
Lameness is a severe welfare problem and production-limiting disease in dairy farming. The objectives of this study were to determine prevalence lameness investigate cow- herd-level factors associated with cows housed freestall barns 3 Canadian provinces. A purposive sample 40 Holstein-Friesian was selected from each 141 farms Québec, Ontario, Alberta. In total, 5,637 scored once for (presence limping when walking). Data collected included information on individual (hock lesions, claw...
The objectives of this cross-sectional study were to determine the prevalence and distribution foot lesions associated cow- herd-level risk factors in dairy cows Alberta, Canada. Foot lesion data recorded electronically by 7 hoof trimmers on 28,607 156 farms from June 2009 November 2012. estimates differed between that had whole herd trimmed at once (≥80% lactating trimmed; n=69 8,020 cows) which part was (selection determined farmer <80% n=87 20,587 cows). Estimates consistently higher for...
Lying behavior is an important measure of comfort and well-being in dairy cattle, changes lying are potential indicators predictors lameness. Our objectives were to determine individual herd-level risk factors associated with measures behavior, evaluate whether automated can be used detect A purposive sample 40 Holstein cows was selected from each 141 farms Alberta, Ontario, Québec. 5,135 between 10 120 d milk automatically continuously recorded using accelerometers over 4 d. Data on...
Climate warming is occurring at an unprecedented rate in the Arctic and having profound effects on host-parasite interactions, including range expansion. Recently, two species of protostrongylid nematodes have emerged for first time muskoxen caribou Victoria Island western Canadian Archipelago. Umingmakstrongylus pallikuukensis, muskox lungworm, was detected 2008 a community hunt southwest corner island by 2012, it found several hundred kilometers east commercially harvested near town...
Early identification of sick cattle increases treatment success and decreases mortality. Continuous automated records behavior can be used to identify early in the disease process. The objective was evaluate accuracy an ear-attached accelerometer (SensOor) that quantified ear movements estimated feeding rumination time through a proprietary algorithm. Accelerometers were attached tag 18 steers with initial mean BW 326 ± 46 kg. manufacturer's software determine spent "feeding," "ruminating,"...
Abstract The longstanding assumption that calves of more than 6 months age are resistant to Mycobacterium avium subspecies paratuberculosis (MAP) infection has recently been challenged. In order elucidate this, a challenge experiment was performed evaluate age- and dose-dependent susceptibility MAP in dairy calves. Fifty-six from MAP-negative dams were randomly allocated 10 groups (5 animals per group) negative control group (6 calves). Calves inoculated orally on 2 consecutive days at 5...
Bovine respiratory disease (BRD), which can cause substantial losses for feedlot operations, is often difficult to detect based solely on visual observations. The objectives of the current study were determine a BRD case identification clinical and laboratory parameters assess value feeding behavior early detection BRD. Auction-derived, mixed-breed beef steers (n = 213) with an average arrival weight 294 kg placed at southern Alberta commercial equipped automated feed bunk monitoring system....
Although substantial fecal shedding is expected to start years after initial infection with Mycobacterium avium subspecies paratuberculosis (MAP), the potential for by calves and therefore calf-to-calf transmission underestimated in current Johne's disease (JD) control programs. Shedding patterns were determined this study experimentally infected calves. Fifty challenged at 2 weeks or 3, 6, 9 12 months of age (6 served as a group). In each group, 5 inoculated low high dose MAP. Fecal culture...
Knowledge about how bacterial populations are structured is an important prerequisite for studying their ecology and evolutionary history facilitates inquiry into host specificity, pathogenicity, geographic dispersal molecular epidemiology. Erysipelothrix rhusiopathiae opportunistic pathogen that currently reemerging in both the swine poultry industries globally. This bacterium sporadically causes mortalities captive marine mammals, has recently been implicated large-scale wildlife die-offs....
Greenhouse gas (GHG) emissions from livestock production must be urgently tackled to substantially reduce their contribution global warming. Simply reducing numbers this end risks impacting negatively on food security, rural livelihoods and climate change adaptation. We argue that significant mitigation of can delivered immediately by improving animal health hence efficiency, but route is not prioritized because its benefits, although intuitive, are poorly quantified. Rigorous methodology...