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Title: Comparison of two enzyme-linked immunosorbent assays for diagnosis of Mycobacterium avium subsp. paratuberculosis
Source: Journal of Veterinary Diagnostic Investigation: Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc
Date: 2005
Author: McKenna, Shawn L.; Sockett, D. C.; Keefe, Gregory P.; McClure, J. Trenton; VanLeeuwen, John A.; Barkema, H. W.
Genre: Journal Article
Abstract: Enzyme-linked immunosorbent assays (ELISAs) are used in Johne's disease (JD) control programs as a first screening for presence of the disease...
Volume: 17
Issue: 5
Start Page: 463
Publication Status: NO_OBJ

Title: Impacts and control of insidious infectious diseases - beat them before they beat you and your clients - MAP, NC, BLV, and BVDV in dairy cattle
Source: Proceedings of the WBC Conference
Date: 2004
Author: VanLeeuwen, John A.
Genre: Conference Proceedings

Title: Associations between stomach cancer incidence and drinking water contamination with atrazine and nitrate in Ontario (Canada) agroecosystems, 1987-1991
Source: International Journal of Epidemiology
Date: 1999
Author: VanLeeuwen, John A.; Waltner-Toews, D.; Abernathy, T.; Smit, B.; Shoukri, M.
Genre: Journal Article
Abstract: BACKGROUND: Nitrate and atrazine are two chemicals that are heavily used in certain sectors of agriculture. They are suspected to be associated...
Volume: 28
Issue: 5
Start Page: 836

Title: Relationships among milk urea-nitrogen, dietary parameters, and fecal nitrogen in commercial dairy herds
Source: Canadian Journal of Veterinary Research
Date: 2008
Author: Arunvipas, Pipat; VanLeeuwen, John A.; Dohoo, Ian R.; Keefe, Greg P.; Burton, Shelley A.; Lissemore, Kerry D.
Genre: Journal Article
Abstract: Our study objective was to determine the ability of milk urea-nitrogen concentrations ([MUN]) to predict fecal nitrogen concentrations ([Fecal N])...
Volume: 72
Issue: 5
Start Page: 449

Title: The effect of non-nutritional factors on milk urea nitrogen levels in Holstein dairy cows
Source: Proceedings of the American Association of Bovine Practioners
Date: 2002
Author: Arunvipas, P.; VanLeeuwen, John A.; Dohoo, Ian R.; Keefe, Gregory P.
Genre: Conference Proceedings

Title: Seroprevalence and spatial distribution of BLV, BVDV, MAP, and NC in Canadian dairy cattle
Source: GISVET Conference
Date: 2004
Author: Tiwari, A.; VanLeeuwen, John A.; Dohoo, Ian R.; Haddad, J. P.; Keefe, Gregory P.
Genre: Conference Proceedings

Title: A slaughterhouse study on the cow-level prevalence of paratuberculosis in dairy cow in Atlantic Canada
Source: ISVEE
Date: 2003
Author: McKenna, Shawn L.; Keefe, Gregory P.; Barkema, H. W.; VanLeeuwen, John A.; Hanna, Paul E.; McClure, J. Trenton; Spangler, Elizabeth; Sockett, D.
Genre: Conference Proceedings

Title: The relationship between milk urea mitrogen and reproductive performance in dairy cattle
Source: AABP Proceedings
Date: 2003
Author: Arunvipas, P.; VanLeeuwen, John A.; Dohoo, Ian R.; Keefe, Gregory P.
Genre: Conference Proceedings

Title: Comparison of serological methods for the diagnosis of Neospora caninum infection in cattle
Source: Veterinary Parasitology
Date: 2007
Author: Wapenaar, W.; Barkema, H. W.; VanLeeuwen, John A.; McClure, J. Trenton; O'Handley, R. M.; Kwok, O. C.; Thulliez, P.; Dubey, J. P.; Jenkins, M. C.
Genre: Journal Article
Abstract: The aims of this study were to evaluate the performance and agreement of various commercial and in-house Neospora caninum antibody assays used in...
Volume: 143
Issue: 2
Start Page: 166
DOI: 10.1016/j.vetpar.2006.08.007

Title: Culling risk of infection with BLV, MAP & NC
Source: Annual Meeting of CAVEPM
Date: 2003
Author: Tiwari, A.; VanLeeuwen, John A.; Dohoo, Ian R.; Haddad, J. P.; Stryhn, Henrik E.; Keefe, Gregory P.
Genre: Conference Proceedings

Title: Point estimation and variability in prevalence in herds with low disease prevalence using imperfect tests- M. paratuberculosis prevalence in the Netherlands, New York State, Eastern Canada
Source: Annual Convention of the AABP
Date: 2001
Author: Van Schaik, G.; Schukken, Y.; VanLeeuwen, John A.; Dohoo, Ian R.; Keefe, Gregory P.
Genre: Conference Proceedings

Title: Prevalence of M. paratuberculosis adjusted for test variability using Bayesian analysis
Source: Annual Convention of the SVEPM
Date: 2001
Author: Van Schaik, G.; Schukken, Y.; Crainiceanu, C.; Muskens, J.; VanLeeuwen, John A.
Genre: Conference Proceedings

Title: The economics of controlling infectious diseases on dairy farms
Source: Canadian Journal of Agricultural Economics
Date: 2002
Author: Weersink, A.; VanLeeuwen, John A.; Keefe, Gregory P.
Genre: Journal Article
Abstract: Cost-effective disease control on the dairy farm can enhance productivity and subsequently profitability. Previous economic studies on animal...
Volume: 50
Issue: 3
Start Page: 237