Search Results - "Keefe, Gregory P"

Herd-Level Mastitis-Associated Costs on Canadian Dairy Farms by Aghamohammadi, Mahjoob, Haine, Denis, Kelton, David F, Barkema, Herman W, Hogeveen, Henk, Keefe, Gregory P, Dufour, Simon

“…Mastitis imposes considerable and recurring economic losses on the dairy industry worldwide. The main objective of this study was to estimate herd-level costs…”
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Gap between producers and veterinarians regarding biosecurity on Quebec dairy farms by Denis-Robichaud, José, Kelton, David F, Bauman, Cathy A, Barkema, Herman W, Keefe, Gregory P, Dubuc, Jocelyn

“…As part of the ProAction on-farm program to implement national biosecurity requirements on dairy farms, Canadian veterinarians are called upon to complete…”
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Measurement of serum immunoglobulin G in dairy cattle using Fourier-transform infrared spectroscopy: A reagent free approach by Elsohaby, Ibrahim, Riley, Christopher B., Hou, Siyuan, McClure, J. Trenton, Shaw, R. Anthony, Keefe, Gregory P.

“…•FTIR spectroscopy application in veterinary medicine.•Multivariate calibration using PLS regression.•Simple, rapid and cost effective method for bovine serum…”
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Quantification of bovine immunoglobulin G using transmission and attenuated total reflectance infrared spectroscopy by Elsohaby, Ibrahim, McClure, J. Trenton, Riley, Christopher B., Shaw, R. Anthony, Keefe, Gregory P.

“…In this study, we evaluated and compared the performance of transmission and attenuated total reflectance (ATR) infrared (IR) spectroscopic methods (in…”
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A rapid field test for the measurement of bovine serum immunoglobulin G using attenuated total reflectance infrared spectroscopy by Elsohaby, Ibrahim, Hou, Siyuan, McClure, J Trenton, Riley, Christopher B, Shaw, R Anthony, Keefe, Gregory P

“…Following the recent development of a new approach to quantitative analysis of IgG concentrations in bovine serum using transmission infrared spectroscopy, the…”
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Direct production losses and treatment costs from bovine viral diarrhoea virus, bovine leukosis virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum by Chi, Junwook, VanLeeuwen, John A., Weersink, Alfons, Keefe, Gregory P.

“…Our purpose was to determine direct production losses (milk loss, premature voluntary culling and reduced slaughter value, mortality loss, and abortion and…”
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Prevalence of contagious mastitis pathogens in bulk tank milk in Prince Edward Island by Riekerink, R.G.M. olde, Barkema, H.W, Veenstra, S, Poole, D.E, Dingwell, R.T, Keefe, G.P

“…The purpose of this study was to 1) estimate the herd prevalence of contagious mastitis pathogens in bulk milk from Prince Edward Island (PEI) dairy farms, 2)…”
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Bulk tank milk selenium and its association with milk production parameters in Canadian dairy herds by Ceballos-Márquez, Alejandro, Barkema, Herman W, Stryhn, Henrik, Dohoo, Ian R, Keefe, Gregory P, Wichtel, Jeffrey J

“…An observational study was conducted in 63 Canadian dairy farms to evaluate the association of bulk tank milk selenium (Se) concentration (BTSe) with average…”
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Management factors related to seroprevalences to bovine viral-diarrhoea virus, bovine-leukosis virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum in dairy herds in the Canadian Maritimes by Chi, Junwook, VanLeeuwen, John A., Weersink, Alfons, Keefe, Gregory P.

“…Bovine viral-diarrhoea (BVD), enzootic bovine leukosis (EBL), Johne’s disease (JD), and neosporosis lower on-farm productivity, reduce export competitiveness,…”
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Monensin toxicosis in a dairy herd by Gonzalez, M, Barkema, H.W, Keefe, G.P

“…An acute onset of illness was reported in a lactating dairy herd in Canada in which monensin had been incorporated in error in its ration at almost 10 times…”
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The Economics of Controlling Infectious Diseases on Dairy Farms by Chi, Junwook, Weersink, Alfons, VanLeeuwen, John A., Keefe, Gregory P.

“…Cost‐effective disease control on the dairy farm can enhance productivity and subsequently profitability. Previous economic studies on animal disease have…”
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The selenium status of dairy herds in Prince Edward Island by Wichtel, Jeffrey J, Keefe, Gregory P, Van Leeuwen, John A, Spangler, Elizabeth, McNiven, Mary A, Ogilvie, Timothy H

“…Bulk tank milk selenium (Se) concentration was compared with mean serum Se concentration in 15 herds and was found to be an accurate reflection of the herd Se…”
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A novel method for the quantification of bovine colostral immunoglobulin G using infrared spectroscopy by Elsohaby, Ibrahim, McClure, J. Trenton, Hou, Siyuan, Riley, Christopher B., Shaw, R. Anthony, Keefe, Gregory P.

“…Transmission infrared (IR) spectroscopy, in combination with partial least squares (PLS) regression, was used as the basis to develop a new method to quantify…”
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Streptococcus agalactiae mastitis: a review by Keefe, G.P

“…Streptococcus agalactiae continues to be a major cause of subclinical mastitis in dairy cattle and a source of economic loss for the industry. Veterinarians…”
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Neospora then and now: prevalence of Neospora caninum in Maritime Canada in 1979, 1989, and 1998 by Keefe, G.P, VanLeeuwen, J.A

“…The seroprevalence of Neospora caninum was compared among New Brunswick, Nova Scotia, and Prince Edward Island in 1998, 1989, and 1979. In 1998, the…”
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Measures of estrus detection and pregnancy in dairy cows after administration of gonadotropin-releasing hormone within an estrus synchronization program based on prostaglandin F2 alpha by LeBlanc, S J, Leslie, K E, Ceelen, H J, Kelton, D F, Keefe, G P

“…The objective of this study was to assess the use of GnRH in a controlled breeding program (7 d prior to the second of two injections of PGF2 alpha, 14 d…”
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Evaluation of melengestrol acetate and equine chorionic gonadotropin for out-of-season breeding in sheep in Prince Edward Island by Keefe, G.P, Wichtel, J.J

“…The purpose of this study was to compare the efficacy of a recommended protocol of oral melengestrol acetate (MGA) to intravaginal medroxyprogesterone acetate…”
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survey of demographics and information demands of dairy producers by VanLeeuwen, J.A, Keefe, G.P

“…Survey responses from 75 randomly selected dairy producers on Prince Edward Island were summarized to obtain a demographic picture of the dairy industry in…”
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