Browsing Ovine Johne’s Disease Research & Development Program by title
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Aspects of the pathogenesis of ovine Johne's Disease. Ph.D. thesis--Faculty of Veterinary Science, University of Sydney, 2003
Published 2002-03-01John'es disease is a chronic enteropathy of ruminants cause by infection with M. a. paratuberculosis. This study deals with the enumeration of Australian ovine isolates of M. a. paratuberculosis which will help facilitate ...Open AccessThesis -
Assessing the risks of transmitting OJD in the semen of rams by artificial insemination.
Published 2000-12-01The impact on stud breeders of the current national program to limit the spread of OJD within the Australian sheep industry could be reduced if they could safely use semen from within their studs. Trading semen would be a ...Open AccessOther -
Cross species transmission of Ovine Johne's Disease - Phase 2 cattle.
Published 2002-09-01One thousand seven hundred and seventy four cattle from 12 properties were sampled by ELISA and faecal culture to detect Johne’s Disease. All properties had a known significant history of Johne’s disease in sheep. They ...Open AccessReport, Technical -
Cross species transmission of ovine Johnes Disease - Phase 1 : National Ovine Johne’s Disease Control and Evaluation Program.
Published 2000-06-01Johne’s disease was investigated in fibre goats on several farms. The disease was caused by sheep [S] strains of Mycobacterium avium subsp. paratuberculosis. The infection appeared to be less severe than the same infection ...Open AccessReport, Technical -
Culture of Mycobacterium paratuberculosis from soil
Published 1997-01-01Open AccessReport, Technical -
Determination of individual animal-level sensitivity of abattoir surveillance for ovine Johne's Disease.
Published 2002-09-01This project aimed to estimate the sensitivity of abattoir surveillance for ovine Johne’s disease (OJD) at an individual animal level. Currently abattoir surveillance for OJD occurs in 21 meatworks around Australia and ...Open AccessReport, Technical -
Development of a rapid cost effective test for ovine Johne's Disease based on testing of pooled faeces : final report.
Published 2000-06-30This project was undertaken to develop and evaluate a rapid, cost-effective, flock test for Mycobacterium paratuberculosis in pooled faecal samples, based on hybridisation-capture polymerase chain reaction (HC-PCR). However, ...Open AccessReport, Technical -
Development of computer models to describe the epidemiology of Johne's disease in sheep.
Published 2002-06-01The pathogenesis, epidemiology and options for control of Johne's disease in sheep were reviewed and mathematical models developed to simulate the spread of Johne’s disease within infected flocks, and between flocks on a ...Open AccessReport, Technical -
Epidemiology of ovine Johne's disease 2 - pasture contamination level and age susceptibility.
Published 2005-06-01To develop pasture management strategies for control of ovine Johne’s disease, research was conducted in a flock of 840 sheep to determine whether age of sheep and pasture contamination levels affect ovine Johne’s disease. ...Open AccessReport, Technical -
Evaluation and comparison of two methods of abattoir surveillance for detection of ovine Johne’s Disease.
Published 2001-06-01This project was designed to determine whether properties infected with ovine Johne’s disease (OJD) could be identified by routine monitoring of cull sheep at abattoirs for lesions of OJD or the presence of Mycobacterium ...Open AccessReport, Technical -
Evaluation of eradication strategies for ovine Johne's Disease.
Published 2005-02-01Johne’s disease, caused by Mycobacterium avium subspecies paratuberculosis (Mptb), is spreading through domestic and non-domestic populations of ruminants worldwide. Ovine Johne’s Disease (OJD) is considered to be a ...Open AccessReport, Technical -
Evaluation of PFC and AGID as flock-screening tests for OJD : National Ovine Johne's Disease Control and Evaluation Program.
Published 2001-11-01The aims of this project were to provide comparative estimates of the flock-sensitivity of PFC and AGID under a range of likely scenarios, using a simulation approach. Sample sizes required to achieve equivalent performance ...Open AccessReport, Technical -
Ewe-lamb transmission of ovine Johne's Disease.
Published 2003-04-01Knowledge of the likelihood of intrauterine or transmammary transmission of M. a. paratuberculosis infection in sheep is important in the design of control programs. Little has been published on this aspect of ovine Johne's ...Open AccessReport, Technical -
Exposure factors leading to establishment of OJD infection and clinical disease : epidemiology of OJD-1.
Published 2004-12-01This 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 ...Open AccessReport, Technical -
Field evaluation of OJD control using Gudair.
Published 2005-05-01A 5-year field trial was undertaken to determine the efficacy of a killed M. a. paratuberculosis vaccine, GudairTM, for the control of OJD in Australian merinos. The vaccine stimulated cellmediated and humoral immune ...Open AccessReport, Technical -
Field evaluation of the tracer weaner model : early detection of sheep with Mycobacterium avium subsp. paratuberculosis.
Published 2002-11-01Experiments were conducted on two separate farms in the endemic area for OJD to determine whether tracer animals could be used to detect infective levels of S strain M. a. paratuberculosis on pasture. Culture from tissues ...Open AccessReport, Technical -
Identification of risk factors for OJD infection-level in sheep flocks.
Published 2005-06-30The level of clinical disease experienced due to ovine Johne’s disease (OJD) appears to vary considerably between infected sheep flocks in Australia, even for flocks in the same locality that appear to have similar ...Open AccessReport, Technical -
Individual animal tests for ovine Johne's disease.
Published 2004-03-01Routine diagnostic tests for ovine paratuberculosis have poor sensitivity in the early stages of the disease, and transmission often occurs before detection. Currently there are no tests to accurately confirm early infection ...Open AccessReport, Technical -
Investigations of adult sheep vaccinated with Gudair® for protection against ovine Johne’s disease.
Published 2003-10-01This observational study closely examined the gross and histopathological lesions associated with ovine Johne’s disease in sheep vaccinated as adults with Gudair®. Two cohorts of Gudair® vaccinated sheep were used from two ...Open AccessThesis, Honours