Molecular approaches to solving current and emerging problems in the epidemiology and diagnosis of Marek's disease in Australia. Marek's disease (MD) is a ubiquitous viral disease of chickens that is currently controlled in meat chickens by blanket vaccination of all chickens. However, as has happened overseas, the efficacy of the HVT vaccine being used in Australia is breaking down resulting in subclinical and clinical losses due to MD. To assist industry deal with this situation we propose to ....Molecular approaches to solving current and emerging problems in the epidemiology and diagnosis of Marek's disease in Australia. Marek's disease (MD) is a ubiquitous viral disease of chickens that is currently controlled in meat chickens by blanket vaccination of all chickens. However, as has happened overseas, the efficacy of the HVT vaccine being used in Australia is breaking down resulting in subclinical and clinical losses due to MD. To assist industry deal with this situation we propose to develop novel molecular methods for the quantification of Marek's disease viruses (MDV) in the host and the environment, to use these methods to design effective early monitoring systems for MD in broilers that predict disease and performance outcomes, and to develop an epidemiological model that will predict the spread and severity of MD as failure of vaccinal protection progresses.Read moreRead less
Retroviral invasion of the koala genome: prevalence, transmission and role in immunosuppressive disease. Koalas are a national symbol yet many of their populations are in decline as a result of habitat loss and disease. Lymphoid cancers and opportunistic infections are significant diseases in both captive and wild koala populations. We previously demonstrated that the recently identified koala retrovirus is associated with lymphoid cancer in koalas. This project will determine the distribution o ....Retroviral invasion of the koala genome: prevalence, transmission and role in immunosuppressive disease. Koalas are a national symbol yet many of their populations are in decline as a result of habitat loss and disease. Lymphoid cancers and opportunistic infections are significant diseases in both captive and wild koala populations. We previously demonstrated that the recently identified koala retrovirus is associated with lymphoid cancer in koalas. This project will determine the distribution of the virus in Australia, the mechanism of its spread and its effect on the immune function of koalas. This research will provide a foundation for better management of captive koalas and for conservation of wild koalas.Read moreRead less
Development of a new diet to improve insulin sensitivity and manage weight in healthy cats. This project will determine if a low carbohydrate, moderate fat, high protein diet improves insulin sensitivity and reduces weight gain in cats compared to a typical high-carbohydrate grocery line diet. It will identify risk factors for weight gain such as increased fasting insulin concentration and will also determine which simple assessment of insulin sensitivity best correlates with insulin sensitivity ....Development of a new diet to improve insulin sensitivity and manage weight in healthy cats. This project will determine if a low carbohydrate, moderate fat, high protein diet improves insulin sensitivity and reduces weight gain in cats compared to a typical high-carbohydrate grocery line diet. It will identify risk factors for weight gain such as increased fasting insulin concentration and will also determine which simple assessment of insulin sensitivity best correlates with insulin sensitivity measured by a gold standard. This project should lead to the formulation of a diet designed to improve insulin sensitivity and minimize weight gain in cats, and allow for earlier identification of cats at risk of obesity.Read moreRead less
Biotechnology and epidemiology to control nodavirus in barramundi aquaculture. Production of farmed barramundi has increased more than 1200% in the NT since 2001 but is threatened by nodavirus infection. Three industry partners, Darwin Aquaculture Centre, Marine Harvest and Berrimah Veterinary Laboratory will collaborate with The University of Sydney to:
1. control nodavirus infection
2. develop new technologies to detect nodavirus using immunoassay and surface enhanced laser desorption ionis ....Biotechnology and epidemiology to control nodavirus in barramundi aquaculture. Production of farmed barramundi has increased more than 1200% in the NT since 2001 but is threatened by nodavirus infection. Three industry partners, Darwin Aquaculture Centre, Marine Harvest and Berrimah Veterinary Laboratory will collaborate with The University of Sydney to:
1. control nodavirus infection
2. develop new technologies to detect nodavirus using immunoassay and surface enhanced laser desorption ionisation mass spectroscopy (SELDI)
3. develop an integrated disease control strategy based on epidemiological survey data, and ensure that it is practical and able to be widely adopted
By this means growth targets for barramundi aquaculture in northern Australia will be achieved.
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The epidemiology of canine gastrointestinal parasitic zoonoses in different community settings in Thailand. The dog's role in transmitting zoonotic gastrointestinal parasites to humans has been recognised as a significant public health problem worldwide. Surveillance data with regard to canine parasites in Thailand and its regional countries is largely lacking, especially with regard to the dog's role as a perpetuator of the liver and intestinal flukes. This project aims to provide an accurate ....The epidemiology of canine gastrointestinal parasitic zoonoses in different community settings in Thailand. The dog's role in transmitting zoonotic gastrointestinal parasites to humans has been recognised as a significant public health problem worldwide. Surveillance data with regard to canine parasites in Thailand and its regional countries is largely lacking, especially with regard to the dog's role as a perpetuator of the liver and intestinal flukes. This project aims to provide an accurate and comprehensive assessment of the risks these parasites pose to the public using a combination of conventional and novel molecular epidemiological tools. Successful completion of this project will provide a model for control programs to be generated in the SE Asian region.Read moreRead less
Devil Facial Tumour Disease: Cytogenetic Clues to Transmission and Development. Devil Facial Tumour Disease is a fatal cancer that is decimating Tasmanian devils. Preliminary work suggests that tumours from different animals have identical sets of highly abnormal chromosomes, including a giant marker chromosome. We will use DNA probes to 'paint' abnormal tumour chromosomes to discover markers for diagnosis, and identify genes contributing to tumour development and immune suppression. Most import ....Devil Facial Tumour Disease: Cytogenetic Clues to Transmission and Development. Devil Facial Tumour Disease is a fatal cancer that is decimating Tasmanian devils. Preliminary work suggests that tumours from different animals have identical sets of highly abnormal chromosomes, including a giant marker chromosome. We will use DNA probes to 'paint' abnormal tumour chromosomes to discover markers for diagnosis, and identify genes contributing to tumour development and immune suppression. Most importantly, we will test our hypothesis that tumours all arose from a single ancestral cancer cell that is transmitted between animals. A cellular transmission has frightening implications for spread of disease, but will allow us to develop appropriate therapeutic strategies to save a unique Australian marsupial from extinction.Read moreRead less
Pathophysiological mechanisms in equine dyschondroplasia (osteochondrosis). Dyschondroplasia (osteochondrosis) is a developmental orthopaedic disease of horses, which causes significant wastage within the Thoroughbred racing industry. The disease affects growth cartilage beneath joint surfaces in such a way that cartilage fails to be replaced by bone, resulting in defects in the joint surface and lameness. This project will identify differences in gene expression between normal cartilage and ea ....Pathophysiological mechanisms in equine dyschondroplasia (osteochondrosis). Dyschondroplasia (osteochondrosis) is a developmental orthopaedic disease of horses, which causes significant wastage within the Thoroughbred racing industry. The disease affects growth cartilage beneath joint surfaces in such a way that cartilage fails to be replaced by bone, resulting in defects in the joint surface and lameness. This project will identify differences in gene expression between normal cartilage and early dyschondroplastic lesions, in order to identify the sequence of molecular events leading to induction of disease. The basic understanding of joint development obtained from this work will assist in the development of strategies to prevent and diagnose dyschondroplasia in horses.Read moreRead less
Electric field induced surface attachment and detachment of proteins. Microarrays are revolutionising the diagnosis of disease by enabling large amounts of data on genetics and protein expression to be obtained from one sample. Biosensors for diseases and toxins rely on the same mechanism, namely attachment of biological macromolecules to a surface. We propose a new method for controlling the attachment by micromachining an electrode system to apply an electric field to chosen sites. Ultimately ....Electric field induced surface attachment and detachment of proteins. Microarrays are revolutionising the diagnosis of disease by enabling large amounts of data on genetics and protein expression to be obtained from one sample. Biosensors for diseases and toxins rely on the same mechanism, namely attachment of biological macromolecules to a surface. We propose a new method for controlling the attachment by micromachining an electrode system to apply an electric field to chosen sites. Ultimately microelectronic engineering methods will be used. This will give control over the attachment process with potential benefits of orienting attaching molecules, minimising non-specific attachment and enriching diagnostics by enabling interrogation of the force of attachment.Read moreRead less
Why is most of the genetic variance for complex traits undetected by large powerful screens of common variants? The genomics revolution has made it possible to measure thousands of DNA variants in individuals. These variants have been associated with phenotypic outcomes in a range of species. Paradoxically, even very large studies have only accounted for a fraction of the resemblance between relatives that we know exist. Our study will test three specific hypotheses to explain this paradox. A be ....Why is most of the genetic variance for complex traits undetected by large powerful screens of common variants? The genomics revolution has made it possible to measure thousands of DNA variants in individuals. These variants have been associated with phenotypic outcomes in a range of species. Paradoxically, even very large studies have only accounted for a fraction of the resemblance between relatives that we know exist. Our study will test three specific hypotheses to explain this paradox. A better understanding about the genetic architecture for complex traits will improve the efficiency of gene mapping methods, including applications in humans for traits related to productive ageing and a healthy start to life, will lead to more efficient selection programs in agricultural populations and will inform us with respect to past evolutionary events.Read moreRead less
The multiplexed diagnosis of arbovirus infections using combinatorial probes. Viruses that cause serious diseases such as hemorrhagic fever or encephalitis must be quickly identified. Diagnostic tests based on DNA hybridisation are accurate and can be rapid but they are expensive. We will test a method for simplifying DNA tests and increasing their capabilities. DNA probes for detecting arboviruses will be designed at the ANU using new bioinformatic methods and their reliability will be model ....The multiplexed diagnosis of arbovirus infections using combinatorial probes. Viruses that cause serious diseases such as hemorrhagic fever or encephalitis must be quickly identified. Diagnostic tests based on DNA hybridisation are accurate and can be rapid but they are expensive. We will test a method for simplifying DNA tests and increasing their capabilities. DNA probes for detecting arboviruses will be designed at the ANU using new bioinformatic methods and their reliability will be modelled using all the available genetic information. Computer predictions will be experimentally tested in the PANBIO laboratory by using the probes to detect viral nucleic acids. The influence of virus genome complexity will be investigatedRead moreRead less