Search Results - "Wichtel, J.J"

The association between bulk tank milk analysis for raw milk quality and on-farm management practices by Elmoslemany, A.M., Keefe, G.P., Dohoo, I.R., Wichtel, J.J., Stryhn, H., Dingwell, R.T.

“…Our objective was to determine the risk factors associated with bacteriological quality of bulk tank milk. Bulk tank milk samples were collected from all…”
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Meta-analysis of the effect of oral selenium supplementation on milk selenium concentration in cattle by Ceballos, A, Sánchez, J, Stryhn, H, Montgomery, J B, Barkema, H W, Wichtel, J J

“…Soils in many regions of the world have a low Se content. Consequently, forages and crops grown on these soils may provide inadequate dietary Se for humans and…”
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The effect of selenium supplementation before calving on early-lactation udder health in pastured dairy heifers by Ceballos-Marquez, A, Barkema, H W, Stryhn, H, Wichtel, J J, Neumann, J, Mella, A, Kruze, J, Espindola, M S, Wittwer, F

“…Selenium (Se) deficiency has been associated with lowered resistance to mastitis in dairy cattle. However, little published data exists on the effect of Se…”
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Milk selenium concentration and its association with udder health in Atlantic Canadian dairy herds by Ceballos-Marquez, A, Barkema, H W, Stryhn, H, Dohoo, I R, Keefe, G P, Wichtel, J J

“…Soils and plants in Atlantic Canadian provinces are known to contain low concentrations of selenium (Se). Earlier studies have indicated that dairy producers…”
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HS-SPME gas chromatographic characterization of volatile compounds in milk tainted with off-flavour by Mounchili, A., Wichtel, J.J., Bosset, J.O., Dohoo, I.R., Imhof, M., Altieri, D., Mallia, S., Stryhn, H.

“…Milk samples, collected from nine healthy mid-lactation Holstein cows, were analysed organoleptically by two sensory panels, and chromatographically using mass…”
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The Effect of Age on the Immune Response of Horses to Vaccination by Muirhead, T.L., McClure, J.T., Wichtel, J.J., Stryhn, H., Markham, R.J.F., McFarlane, D., Lunn, D.P.

“…Few studies have investigated immunosenescence in the horse, but it is accepted that the primary and secondary (anamnestic) immune responses may differ between…”
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Geographical and temporal aspects of an outbreak of off-flavours in bulk-tank milk in Prince Edward Island, Canada by Mounchili, A., Wichtel, J.J., Sanchez, J.

“…The geographical and temporal dynamics of the outbreak of off-flavours in bulk-tank milk that occurred between September 2000 and June 2002 in Prince Edward…”
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Risk factors for milk off-flavours in dairy herds from Prince Edward Island, Canada by Mounchili, A., Wichtel, J.J., Dohoo, I.R., Keefe, G.P., Halliday, L.J.

“…A sudden increase in the incidence of milk off-flavours in bulk tank milk from Prince Edward Island (Canada) dairy farms in the late 1990s prompted an…”
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Effects of Calliandra and Sesbania supplementation on weight gain in dairy calves on smallholder farms in Kenya by Makau, D.N., VanLeeuwen, J.A., Gitau, G.K., McKenna, S.L., Walton, C., Muraya, J., Wichtel, J.J.

“…The growth rate of female calves on dairy farms is one of the crucial factors which influence age at first calving, affecting lifetime lactation productivity…”
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The effect of estradiol benzoate administration on estrous response and synchronized pregnancy rate in dairy heifers after treatment with exogenous progesterone by Hanlon, D.W., Williamson, N.B., Wichtel, J.J., Steffert, I.J., Craigie, A.L., Pfeiffer, D.U.

“…The objectives of this trial were to determine the effects of 0.5 mg estradiol benzoate administered intramuscularly 24 h after the removal of…”
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Animal and management factors associated with weight gain in dairy calves and heifers on smallholder dairy farms in Kenya by Makau, D.N., VanLeeuwen, J.A., Gitau, G.K., Muraya, J., McKenna, S.L., Walton, C., Wichtel, J.J.

“…Calf growth is an important determinant of dairy herd productivity, particularly in countries where the dairy industry is expanding, such as Kenya. Our…”
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Ovulatory responses and plasma luteinizing hormone concentrations in dairy heifers after treatment with exogenous progesterone and estradiol benzoate by Hanlon, D.W., Williamson, N.B., Wichtel, J.J., Steffert, I.J., Craigie, A.L., Pfeiffer, D.U.

“…The objectives of this experiment were to determine the effects of 0.5 mg estradiol benzoate, administered intramuscularly 24 h after removal of CIDR-B…”
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Effects of Calliandra and Sesbania on Daily Milk Production in Dairy Cows on Commercial Smallholder Farms in Kenya by Wichtel, J. J., Walton, C., McKenna, S. L., Gitau, G. K., VanLeeuwen, John, Makau, D. N., Muraya, J.

“…There is a growing interest in protein supplementation of dairy-cow diets using leguminous shrubs. The study objective was to ascertain the association between…”
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The Effect of Age on Serum Antibody Titers after Rabies and Influenza Vaccination in Healthy Horses by Muirhead, T.L., McClure, J.T., Wichtel, J.J., Stryhn, H., Frederick Markham, R.J., McFarlane, D., Lunn, D.P.

“…Background: The proportion of geriatric horses within the equine population has increased in the past decade, but there is limited information on the immune…”
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Barium selenate supplementation and its effect on intramammary infection in pasture-based dairy cows by Ceballos, A, Kruze, J, Barkema, H W, Dohoo, I R, Sanchez, J, Uribe, D, Wichtel, J J, Wittwer, F

“…A significant proportion of cattle receive inadequate dietary Se because of its low content in soils and pastures of various regions of the world. Several…”
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Effects of postpartum energy intake on pregnancy rates in beef cattle subjected to GnRH- or CIDR-based timed artificial insemination protocols by Wichtel, J.J, Charmley, E, Richardson, G.F, Duynisveld, J.L, Lofstedt, R

“…The objectives were to determine the effects of three levels of postpartum metabolisable energy (ME) intake on pregnancy rates in beef cattle subjected to…”
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Seroprevalence of infection with Mycobacterium avium subspecies paratuberculosis, bovine leukemia virus, and bovine viral diarrhea virus in Maritime Canada dairy cattle by VanLeeuwen, J.A, Keefe, G.P, Tremblay, R, Power, C, Wichtel, J.J

“…The purpose of this study was to survey the seroprevalence of infection with the agents of production-limiting diseases in dairy cattle in New Brunswick, Nova…”
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A longitudinal study of Neospora caninum infection on a dairy farm in New Zealand by Pfeiffer, D.U, Williamson, N.B, Reichel, M.P, Wichtel, J.J, Teague, W.R

“…A 600-cow New Zealand dairy herd experienced an abortion storm in 1997 and was monitored (blood sampling at about 3-month intervals) from May 1997 until…”
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A review of selenium deficiency in grazing ruminants Part 1: New roles for selenium in ruminant metabolism by Wichtel, J.J.

“…dSelenium availability. Selenium deficiency has been an important source of loss to the pastoral industries of New Zealand. About 30% of farmed land in New…”
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A review of selenium deficiency in grazing ruminants Part 2: Towards a more rational approach to diagnosis and prevention by Wichtel, J.J.

“…dEstimating selenium status. Although the importance of selenium in ruminants has been recognised for over 30 years, problems associated with selenium…”
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