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9 results on '"Kelton, D."'

1. Knowledge gaps that hamper prevention and control of Mycobacterium avium subspecies paratuberculosis infection

Author

Barkema, Herman W, Orsel, K., Nielsen, S., Koets, A. P., Rutten, V. P.M.G., Bannantine, J P, Keefe, G P, Kelton, D F, Wells, S J, Whittington, R J, Mackintosh, C.G., Manning, E J, Weber, M. F., Heuer, C., Forde, T L, Ritter, Caroline, Roche, Steven, Corbett, C S, Wolf, R., Griebel, P J, Kastelic, J P, Buck, J., Barkema, Herman W, Orsel, K., Nielsen, S., Koets, A. P., Rutten, V. P.M.G., Bannantine, J P, Keefe, G P, Kelton, D F, Wells, S J, Whittington, R J, Mackintosh, C.G., Manning, E J, Weber, M. F., Heuer, C., Forde, T L, Ritter, Caroline, Roche, Steven, Corbett, C S, Wolf, R., Griebel, P J, Kastelic, J P, and Buck, J.

Abstract

In the last decades, many regional and country-wide control programmes for Johne's disease (JD) were developed due to associated economic losses, or because of a possible association with Crohn's disease. These control programmes were often not successful, partly because management protocols were not followed, including the introduction of infected replacement cattle, because tests to identify infected animals were unreliable, and uptake by farmers was not high enough because of a perceived low return on investment. In the absence of a cure or effective commercial vaccines, control of JD is currently primarily based on herd management strategies to avoid infection of cattle and restrict within-farm and farm-to-farm transmission. Although JD control programmes have been implemented in most developed countries, lessons learned from JD prevention and control programmes are underreported. Also, JD control programmes are typically evaluated in a limited number of herds and the duration of the study is less than 5 year, making it difficult to adequately assess the efficacy of control programmes. In this manuscript, we identify the most important gaps in knowledge hampering JD prevention and control programmes, including vaccination and diagnostics. Secondly, we discuss directions that research should take to address those knowledge gaps.

Published
2018

2. Knowledge gaps that hamper prevention and control of Mycobacterium avium subspecies paratuberculosis infection

Author

Sub GZ Herkauwer, dFAH I&I, Sub Immunologie, dI&I RA-I&I I&I, LS Immunologie, Dep Gezondheidszorg Landbouwhuisdieren, Barkema, Herman W, Orsel, K., Nielsen, S., Koets, A. P., Rutten, V. P.M.G., Bannantine, J P, Keefe, G P, Kelton, D F, Wells, S J, Whittington, R J, Mackintosh, C.G., Manning, E J, Weber, M. F., Heuer, C., Forde, T L, Ritter, Caroline, Roche, Steven, Corbett, C S, Wolf, R., Griebel, P J, Kastelic, J P, Buck, J., Sub GZ Herkauwer, dFAH I&I, Sub Immunologie, dI&I RA-I&I I&I, LS Immunologie, Dep Gezondheidszorg Landbouwhuisdieren, Barkema, Herman W, Orsel, K., Nielsen, S., Koets, A. P., Rutten, V. P.M.G., Bannantine, J P, Keefe, G P, Kelton, D F, Wells, S J, Whittington, R J, Mackintosh, C.G., Manning, E J, Weber, M. F., Heuer, C., Forde, T L, Ritter, Caroline, Roche, Steven, Corbett, C S, Wolf, R., Griebel, P J, Kastelic, J P, and Buck, J.

Published
2018

3. Knowledge gaps that hamper prevention and control of Mycobacterium avium subspecies paratuberculosis infection

Author

Sub GZ Herkauwer, dFAH I&I, Sub Immunologie, dI&I RA-I&I I&I, LS Immunologie, Dep Gezondheidszorg Landbouwhuisdieren, Barkema, Herman W, Orsel, K., Nielsen, S., Koets, A. P., Rutten, V. P.M.G., Bannantine, J P, Keefe, G P, Kelton, D F, Wells, S J, Whittington, R J, Mackintosh, C.G., Manning, E J, Weber, M. F., Heuer, C., Forde, T L, Ritter, Caroline, Roche, Steven, Corbett, C S, Wolf, R., Griebel, P J, Kastelic, J P, Buck, J., Sub GZ Herkauwer, dFAH I&I, Sub Immunologie, dI&I RA-I&I I&I, LS Immunologie, Dep Gezondheidszorg Landbouwhuisdieren, Barkema, Herman W, Orsel, K., Nielsen, S., Koets, A. P., Rutten, V. P.M.G., Bannantine, J P, Keefe, G P, Kelton, D F, Wells, S J, Whittington, R J, Mackintosh, C.G., Manning, E J, Weber, M. F., Heuer, C., Forde, T L, Ritter, Caroline, Roche, Steven, Corbett, C S, Wolf, R., Griebel, P J, Kastelic, J P, and Buck, J.

Published
2018

4. Knowledge gaps that hamper prevention and control of Mycobacterium avium subspecies paratuberculosis infection

Author

Sub GZ Herkauwer, dFAH I&I, Sub Immunologie, dI&I RA-I&I I&I, LS Immunologie, Dep Gezondheidszorg Landbouwhuisdieren, Barkema, Herman W, Orsel, K., Nielsen, S., Koets, A. P., Rutten, V. P.M.G., Bannantine, J P, Keefe, G P, Kelton, D F, Wells, S J, Whittington, R J, Mackintosh, C.G., Manning, E J, Weber, M. F., Heuer, C., Forde, T L, Ritter, Caroline, Roche, Steven, Corbett, C S, Wolf, R., Griebel, P J, Kastelic, J P, Buck, J., Sub GZ Herkauwer, dFAH I&I, Sub Immunologie, dI&I RA-I&I I&I, LS Immunologie, Dep Gezondheidszorg Landbouwhuisdieren, Barkema, Herman W, Orsel, K., Nielsen, S., Koets, A. P., Rutten, V. P.M.G., Bannantine, J P, Keefe, G P, Kelton, D F, Wells, S J, Whittington, R J, Mackintosh, C.G., Manning, E J, Weber, M. F., Heuer, C., Forde, T L, Ritter, Caroline, Roche, Steven, Corbett, C S, Wolf, R., Griebel, P J, Kastelic, J P, and Buck, J.

Published
2018

5. Knowledge gaps that hamper prevention and control of Mycobacterium avium subspecies paratuberculosis infection

Author

Barkema, H W, Orsel, K, Nielsen, S S, Koets, A P, Rutten, V P M G, Bannantine, J P, Keefe, G P, Kelton, D F, Wells, S J, Whittington, R J, Mackintosh, C G, Manning, E J, Weber, M F, Heuer, C, Forde, T L, Ritter, C, Roche, S, Corbett, C S, Wolf, R, Griebel, P J, Kastelic, J P, De Buck, J, Barkema, H W, Orsel, K, Nielsen, S S, Koets, A P, Rutten, V P M G, Bannantine, J P, Keefe, G P, Kelton, D F, Wells, S J, Whittington, R J, Mackintosh, C G, Manning, E J, Weber, M F, Heuer, C, Forde, T L, Ritter, C, Roche, S, Corbett, C S, Wolf, R, Griebel, P J, Kastelic, J P, and De Buck, J

Abstract

In the last decades, many regional and country-wide control programmes for Johne's disease (JD) were developed due to associated economic losses, or because of a possible association with Crohn's disease. These control programmes were often not successful, partly because management protocols were not followed, including the introduction of infected replacement cattle, because tests to identify infected animals were unreliable, and uptake by farmers was not high enough because of a perceived low return on investment. In the absence of a cure or effective commercial vaccines, control of JD is currently primarily based on herd management strategies to avoid infection of cattle and restrict within-farm and farm-to-farm transmission. Although JD control programmes have been implemented in most developed countries, lessons learned from JD prevention and control programmes are underreported. Also, JD control programmes are typically evaluated in a limited number of herds and the duration of the study is less than 5 year, making it difficult to adequately assess the efficacy of control programmes. In this manuscript, we identify the most important gaps in knowledge hampering JD prevention and control programmes, including vaccination and diagnostics. Secondly, we discuss directions that research should take to address those knowledge gaps.

Published
2018

6. Invited review: Changes in the dairy industry affecting dairy cattle health and welfare

Author

Barkema, H W, von Keyserlingk, M A G, Kastelic, J P, Lam, T J G M, Luby, C, Roy, J-P, LeBlanc, S J, Keefe, G P, Kelton, D F, Barkema, H W, von Keyserlingk, M A G, Kastelic, J P, Lam, T J G M, Luby, C, Roy, J-P, LeBlanc, S J, Keefe, G P, and Kelton, D F

Abstract

The dairy industry in the developed world has undergone profound changes over recent decades. In this paper, we present an overview of some of the most important recent changes in the dairy industry that affect health and welfare of dairy cows, as well as the science associated with these changes. Additionally, knowledge gaps are identified where research is needed to guide the dairy industry through changes that are occurring now or that we expect will occur in the future. The number of farms has decreased considerably, whereas herd size has increased. As a result, an increasing number of dairy farms depend on hired (nonfamily) labor. Regular professional communication and establishment of farm-specific protocols are essential to minimize human errors and ensure consistency of practices. Average milk production per cow has increased, partly because of improvements in nutrition and management but also because of genetic selection for milk production. Adoption of new technologies (e.g., automated calf feeders, cow activity monitors, and automated milking systems) is accelerating. However, utilization of the data and action lists that these systems generate for health and welfare of livestock is still largely unrealized, and more training of dairy farmers, their employees, and their advisors is necessary. Concurrently, to remain competitive and to preserve their social license to operate, farmers are increasingly required to adopt increased standards for food safety and biosecurity, become less reliant on the use of antimicrobials and hormones, and provide assurances regarding animal welfare. Partly because of increasing herd size but also in response to animal welfare regulations in some countries, the proportion of dairy herds housed in tiestalls has decreased considerably. Although in some countries access to pasture is regulated, in countries that traditionally practiced seasonal grazing, fewer farmers let their dairy cows graze in the summer. The proportion of

Published
2015

7. Invited review: Changes in the dairy industry affecting dairy cattle health and welfare

Author

LS GZ Landbouwhuisdieren, FAH AVM, Applied Veterinary Research, Barkema, H W, von Keyserlingk, M A G, Kastelic, J P, Lam, T J G M, Luby, C, Roy, J-P, LeBlanc, S J, Keefe, G P, Kelton, D F, LS GZ Landbouwhuisdieren, FAH AVM, Applied Veterinary Research, Barkema, H W, von Keyserlingk, M A G, Kastelic, J P, Lam, T J G M, Luby, C, Roy, J-P, LeBlanc, S J, Keefe, G P, and Kelton, D F

Published
2015

8. Invited review: Changes in the dairy industry affecting dairy cattle health and welfare

Author

LS GZ Landbouwhuisdieren, FAH AVM, Applied Veterinary Research, Barkema, H W, von Keyserlingk, M A G, Kastelic, J P, Lam, T J G M, Luby, C, Roy, J-P, LeBlanc, S J, Keefe, G P, Kelton, D F, LS GZ Landbouwhuisdieren, FAH AVM, Applied Veterinary Research, Barkema, H W, von Keyserlingk, M A G, Kastelic, J P, Lam, T J G M, Luby, C, Roy, J-P, LeBlanc, S J, Keefe, G P, and Kelton, D F

Published
2015

9. Invited review: Changes in the dairy industry affecting dairy cattle health and welfare

Author

LS GZ Landbouwhuisdieren, FAH AVM, Applied Veterinary Research, Barkema, H W, von Keyserlingk, M A G, Kastelic, J P, Lam, T J G M, Luby, C, Roy, J-P, LeBlanc, S J, Keefe, G P, Kelton, D F, LS GZ Landbouwhuisdieren, FAH AVM, Applied Veterinary Research, Barkema, H W, von Keyserlingk, M A G, Kastelic, J P, Lam, T J G M, Luby, C, Roy, J-P, LeBlanc, S J, Keefe, G P, and Kelton, D F

Published
2015

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