Management practices associated with Johne's bulk tank milk ELISA positivity
ABSTRACT: Johne's disease (JD) control is often based on the culling of positive animals and the adoption of management practices that minimize exposure of young stock to the pathogen (Mycobacterium avium ssp. paratuberculosis). Throughout 2010 to 2013, the province of Ontario, Canada, institut...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-02-01
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| Series: | Journal of Dairy Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0022030222007317 |
| _version_ | 1797946364227747840 |
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| author | J.B. Imada S.M. Roche C.A. Bauman D.F. Kelton |
| author_facet | J.B. Imada S.M. Roche C.A. Bauman D.F. Kelton |
| author_sort | J.B. Imada |
| collection | DOAJ |
| description | ABSTRACT: Johne's disease (JD) control is often based on the culling of positive animals and the adoption of management practices that minimize exposure of young stock to the pathogen (Mycobacterium avium ssp. paratuberculosis). Throughout 2010 to 2013, the province of Ontario, Canada, instituted a voluntary Johne's control program consisting of whole-herd testing and risk assessment. The JD risk assessment evaluated 5 management areas to characterize herd JD risk. Using a modified milk ELISA technique with an optical density cut-off of 0.089, province-wide bulk tank milk (BTM) testing was used to assess the prevalence of JD high-risk herds at the end of the control program and again 4 yr after its completion. Approximately 71% of Ontario bulk tanks were classified as positive in 2017 compared with roughly 46% in 2013. In 2019, the same JD risk assessment used in the original program was readministered on 180 Ontario dairy farms. Using this cross-sectional approach, logistic regression models were built using data from the original program risk assessment and follow-up risk assessment as well as the BTM ELISA results to determine management factors associated with the control of JD. We demonstrated that management of the maternity area is an important factor in the control of Johne's disease. Although it is believed that the highest risk group for JD infection is calves under 6 mo, the cleanliness scores of older heifers and their exposure to mature cow manure was significantly associated with JD control; farms with highly contaminated weaned and bred heifers and those that had exposure to mature cow manure were more likely to be unsuccessful in their JD control efforts. Careful management of young calves appears to be important for JD control, and this management should continue even after calves have left the maternity area. |
| first_indexed | 2024-04-10T21:09:51Z |
| format | Article |
| id | doaj.art-6155f41cbcb64efc85876d262d249410 |
| institution | Directory Open Access Journal |
| issn | 0022-0302 |
| language | English |
| last_indexed | 2024-04-10T21:09:51Z |
| publishDate | 2023-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Dairy Science |
| spelling | doaj.art-6155f41cbcb64efc85876d262d2494102023-01-21T04:19:58ZengElsevierJournal of Dairy Science0022-03022023-02-01106213301340Management practices associated with Johne's bulk tank milk ELISA positivityJ.B. Imada0S.M. Roche1C.A. Bauman2D.F. Kelton3Department of Population Medicine, University of Guelph, Guelph, ON, Canada, N1G 2W1; Corresponding authorDepartment of Population Medicine, University of Guelph, Guelph, ON, Canada, N1G 2W1; ACER Consulting, Guelph, ON, Canada, N1G 5L3Department of Population Medicine, University of Guelph, Guelph, ON, Canada, N1G 2W1Department of Population Medicine, University of Guelph, Guelph, ON, Canada, N1G 2W1ABSTRACT: Johne's disease (JD) control is often based on the culling of positive animals and the adoption of management practices that minimize exposure of young stock to the pathogen (Mycobacterium avium ssp. paratuberculosis). Throughout 2010 to 2013, the province of Ontario, Canada, instituted a voluntary Johne's control program consisting of whole-herd testing and risk assessment. The JD risk assessment evaluated 5 management areas to characterize herd JD risk. Using a modified milk ELISA technique with an optical density cut-off of 0.089, province-wide bulk tank milk (BTM) testing was used to assess the prevalence of JD high-risk herds at the end of the control program and again 4 yr after its completion. Approximately 71% of Ontario bulk tanks were classified as positive in 2017 compared with roughly 46% in 2013. In 2019, the same JD risk assessment used in the original program was readministered on 180 Ontario dairy farms. Using this cross-sectional approach, logistic regression models were built using data from the original program risk assessment and follow-up risk assessment as well as the BTM ELISA results to determine management factors associated with the control of JD. We demonstrated that management of the maternity area is an important factor in the control of Johne's disease. Although it is believed that the highest risk group for JD infection is calves under 6 mo, the cleanliness scores of older heifers and their exposure to mature cow manure was significantly associated with JD control; farms with highly contaminated weaned and bred heifers and those that had exposure to mature cow manure were more likely to be unsuccessful in their JD control efforts. Careful management of young calves appears to be important for JD control, and this management should continue even after calves have left the maternity area.http://www.sciencedirect.com/science/article/pii/S0022030222007317Johne's diseaselogistic regressionbulk tank milkELISA |
| spellingShingle | J.B. Imada S.M. Roche C.A. Bauman D.F. Kelton Management practices associated with Johne's bulk tank milk ELISA positivity Journal of Dairy Science Johne's disease logistic regression bulk tank milk ELISA |
| title | Management practices associated with Johne's bulk tank milk ELISA positivity |
| title_full | Management practices associated with Johne's bulk tank milk ELISA positivity |
| title_fullStr | Management practices associated with Johne's bulk tank milk ELISA positivity |
| title_full_unstemmed | Management practices associated with Johne's bulk tank milk ELISA positivity |
| title_short | Management practices associated with Johne's bulk tank milk ELISA positivity |
| title_sort | management practices associated with johne s bulk tank milk elisa positivity |
| topic | Johne's disease logistic regression bulk tank milk ELISA |
| url | http://www.sciencedirect.com/science/article/pii/S0022030222007317 |
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