Please use this identifier to cite or link to this item:
|Title:||Exposure factors leading to establishment of OJD infection and clinical disease : epidemiology of OJD-1.|
|Authors:||Abbott, K. A.|
Whittington, R. J
|Keywords:||Ovine Johne’s Disease|
|Publisher:||Meat and Livestock Australia Limited|
|Citation:||North Sydney, NSW|
|Abstract:||This study was conducted in order to provide answers for owners of OJD-infected sheep flocks who wish to minimise the economic and biological impact of the disease on their sheep enterprises. The study has demonstrated that careful management of young sheep can reduce the level of OJD in the flock and reduce the death rate. One key finding is that steps taken to limit the degree of exposure of pre-weaned lambs to infection from pastures will lead to reduced rates of severe infection in those sheep in later years. A second key finding is that continuous exposure to OJD bacteria throughout early life results in higher infection rates than exposure which is limited to either the pre-weaning or the post-weaning period alone. A critical factor in management is to provide ‘low risk’ pastures to young sheep at weaning to give them a break from exposure to infection which occurs in the lambing paddocks. We also found that weaned lambs and adult ewes remain susceptible to infection and that there is little evidence for an age-related resistance to OJD.|
|Description:||This work has been digitally archived on behalf of Meat & Livestock Australia Limited by the Sydney eScholarship Repository at the University of Sydney Library.|
|Rights and Permissions:||Copyright Meat & Livestock Australia Limited|
|Type of Work:||Technical Report|
|Appears in Collections:||Ovine Johne’s Disease Research & Development Program|
This work is protected by Copyright. All rights reserved. Access to this work is provided for the purposes of personal research and study. Except where permitted under the Copyright Act 1968, this work must not be copied or communicated to others without the express permission of the copyright owner. Use the persistent URI in this record to enable others to access this work.
|OJD.002A Final Report.pdf||4.21 MB||Adobe PDF||View/Open|
Items in Sydney eScholarship Repository are protected by copyright, with all rights reserved, unless otherwise indicated.