Publications

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molecular epidemiology of mycobacterium avium subsp. paratuberculosis: is900 restriction fragment length polymorphism and is1311 polymorphism analyses of isolates from animals and a human in australia.the distribution and prevalence of strains of mycobacterium avium subsp. paratuberculosis were determined among sheep, cattle, and other species with johne's disease in australia. a total of 328 isolates were evaluated from numerous farms in new south wales, victoria, tasmania, and south australia, australia. restriction fragment length polymorphism (rflp) analysis of genomic dna using bsteii and an is900 probe and is1311 polymorphism analysis using pcr and restriction endonuclease analysis (pcr ...200010970365
surgical method for biopsy of terminal ileum and mesenteric lymph node of sheep for detection of mycobacterium avium subsp paratuberculosis. 200415088979
effect of a test and control program for johne's disease in victorian beef herds 1992-2002.to report on progress in johne's disease (jd) control in infected beef herds participating in the victorian johne's disease test and control program (tcp).200415088984
comparison of pre- and post-vaccination ovine johne's disease prevalence using a bayesian approach.this study was conducted to evaluate the effectiveness of gudairâ„¢ vaccine in decreasing the prevalence of shedding of mycobacterium avium subsp. paratuberculosis (map) in flocks of varying initial prevalence. thirty-seven self-replacing merino flocks from new south wales and victoria (australia) that had been vaccinating lambs with gudairâ„¢ for at least five years were enrolled in the study. these flocks had been tested prior to or at commencement of vaccination using pooled faecal culture, agar ...201323578910
association of microsatellite polymorphisms with immune responses to a killed mycobacterium avium subsp. paratuberculosis vaccine in merino sheep.to study the association of polymorphisms at five microsatellite loci with immune responses to a killed mycobacterium avium subsp. paratuberculosis (map) vaccine.201020927174
financial modelling of the potential cost of ovine johne's disease and the benefit of vaccinating sheep flocks in southern new south wales.to develop an enterprise gross margin (gm) model that predicts the on-farm financial impact of ovine johne's disease (ojd) for various sheep enterprises in australia. in addition, to estimate the benefits and costs of control through the use of the gudair vaccination, including a breakeven point.200818826512
isolation of mycobacterium avium subsp paratuberculosis from the semen of rams with clinical johne's disease. 200111789915
ovine johne's disease. 19979404611
environmental survival of mycobacterium avium subsp. paratuberculosis in different climatic zones of eastern australia.the duration of survival of both the s and c strains of mycobacterium avium subsp. paratuberculosis in feces was quantified in contrasting climatic zones of new south wales, australia, and detailed environmental temperature data were collected. known concentrations of s and c strains in feces placed on soil in polystyrene boxes were exposed to the environment with or without the provision of shade (70%) at bathurst, armidale, condobolin, and broken hill, and subsamples taken every 2 weeks were c ...201424463974
a preliminary study of possible genetic influences on the susceptibility of sheep to johne's disease.to investigate possible genetic influences on susceptibility or resistance of sheep to johne's disease.200516035186
field evaluation of tracer sheep for the detection of early natural infection with mycobacterium avium subsp paratuberculosis.to determine whether tracer sheep could be used to detect s strain mycobacterium avium subsp paratuberculosis on pasture, and to provide further insight into the early stages of infection.200415354852
specificity of absorbed elisa and agar gel immuno-diffusion tests for paratuberculosis in goats with observations about use of these tests in infected goats.to determine the specificity of serological tests that are currently used in veterinary diagnostic laboratories in australia for detection of mycobacterium avium subsp paratuberculosis infection in goats.200315084016
culture of pooled tissues for the detection of mycobacterium avium subsp paratuberculosis infection in individual sheep. 200315080490
investigation and diagnosis of nontuberculous mycobacteriosis in a captive herd of aoudad (ammotragus lervia).an epizootic of nontuberculous mycobacteriosis occurred in a captive herd of aoudad (ammotragus lervia) over a period of 18 mo. each of the affected animals was subject to a thorough postmortem examination that included histopathology, tissue concentration and acid-fast staining, aerobic and anaerobic bacterial culture, mycobacterial culture, and real-time polymerase chain reaction specific for mycobacterium tuberculosis dna. histopathologic lesions consistent with pulmonary mycobacteriosis, inc ...200919569478
sensitivity and specificity of pooled faecal culture and serology as flock-screening tests for detection of ovine paratuberculosis in australia.the flock-level sensitivity of pooled faecal culture and serological testing using agid for the detection of ovine johne's disease-infected flocks were estimated using non-gold-standard methods. the two tests were compared in an extensive field trial in 296 flocks in new south wales during 1998. in each flock, a sample of sheep was selected and tested for ovine johne's disease using both the agid and pooled faecal culture. the flock-specificity of pooled faecal culture also was estimated from re ...200211849717
cross species transmission of ovine johne's disease from sheep to cattle: an estimate of prevalence in exposed susceptible cattle.to determine the prevalence of infection of cattle with the sheep strain of mycobacterium avium subsp paratuberculosis at least two years after exposure at < 6 months old.200818363982
differentiation of australian isolates of mycobacterium paratuberculosis using pulsed-field gel electrophoresis.to examine strain variation amongst australian isolates of mycobacterium paratuberculosis.19979469224
molecular epidemiological confirmation and circumstances of occurrence of sheep (s) strains of mycobacterium avium subsp. paratuberculosis in cases of paratuberculosis in cattle in australia and sheep and cattle in iceland.distinct strains of mycobacterium avium subsp. paratuberculosis with a tendency to segregate in either sheep, or cattle and other ruminants, have been described and are known as s and c strains, respectively. these strains can be distinguished by a polymorphism in the is1311 element and other dna-based methods. c strains are relatively easy to culture from tissues and faeces of animals with paratuberculosis but s strains are difficult to culture. a retrospective survey of archival formalin-fixed ...200111267791
intrauterine and transmammary transmission of mycobacterium avium subsp paratuberculosis in sheep.to investigate intrauterine infection of foetuses with mycobacterium avium subsp paratuberculosis and the presence of infection in mammary secretions of sheep.200415359967
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