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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
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Title
A new health model for veterinarians
Source
Annual Convention of the CVMA
Date
1995
Author
VanLeeuwen, John A.
;
Waltner-Toews, D.
Genre
Conference Proceedings
Start Page
446
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Title
Tradeoffs in agroecosystem health
Source
Ecosystem Health
Date
1997
Author
Forsythe, M.
;
VanLeeuwen, John A.
Genre
Journal Article
Volume
3
Issue
2
Start Page
92
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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
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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
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Title
Water quality and ruminant health
Source
AVC Continuing Education Fall Conference
Date
1998
Author
VanLeeuwen, John A.
;
Keefe, Gregory P.
Genre
Conference Proceedings
Start Page
F1
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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
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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
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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
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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
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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
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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
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Title
Salt poisoning in beef cattle on coastal pasture in PEI
Source
Canadian Veterinary Journal
Date
1999
Author
VanLeeuwen, John A.
Genre
Journal Article
Volume
40
Issue
5
Start Page
347
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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
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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
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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
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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
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Title
JD - prevalence in the Maritime provinces
Source
AVC Continuing Education Fall Conference
Date
1999
Author
VanLeeuwen, John A.
;
Keefe, Gregory P.
;
Wichtel, Jeffrey
Genre
Conference Proceedings
Start Page
77
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Title
The effect of non-nutritional factors on MUN levels in Ayrshire dairy cows
Source
American Dairy Science Association (ADSA) Meeting
Date
2002
Author
Arunvipas, P.
;
Dohoo, Ian R.
;
VanLeeuwen, John A.
;
Leger, E.
;
Keefe, Gregory P.
Genre
Conference Proceedings
Start Page
320
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Title
Seroprevalence, spacial distribution and productivity effects of infection with Johne's disease and bovine leukosis in Maritime Canadian dairy cattle
Source
International Society of Veterinary Epidemiology and Economics
Date
2000
Author
VanLeeuwen, John A.
;
Keefe, Gregory P.
;
Tremblay, R.
;
Power, C.
;
Wichtel, Jeffrey
Genre
Conference Proceedings
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