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Defining Risk And Mechanisms Of Permucosal Transmission For Acute HCV Infection Within High-risk Populations.
Funder
National Health and Medical Research Council
Funding Amount
$395,182.00
Summary
Hepatitis C virus (HCV) is usually transmitted by blood-to-blood contact. The risk of transmission by sexual contact has been thought to be low. However, in recent years increasing hepatitis C infection has been documented among HIV-positive gay men, with sexual contact the most most likely means of infection in the majority of cases. This grant will use established cohorts to define levels of hepatitis C risk through sexual contact among homosexual men to inform public health strategies.
Modelling The Evolution Of Hepatitis C Virus By Integrating Large Sequence- And Immunological-databases.
Funder
National Health and Medical Research Council
Funding Amount
$289,980.00
Summary
Two hundred million people are infected with the Hepatitis C virus. There is no vaccine and the rate at which new strains of the virus arise enable it to evade the human immune system. This study aims to decipher how new viral strains are generated and transmitted, thereby enabling the development of new vaccines.
Injecting Drug Users: Social Networks And Molecular Epidemiology Of The Hepatitis C Virus
Funder
National Health and Medical Research Council
Funding Amount
$543,868.00
Summary
The hepatitis C virus (HCV) continues to spread among injecting drug users (IDUs) in Australia at a very high rate, despite success in preventing the spread of HIV in the same groups; the complete reasons for this remain unclear. There is an urgent need for the HCV epidemic among IDUs to be contained. To do so, we must better understand the ways in which it is spreading among IDUs. Much is known about risk behaviours of individual IDUs and how they contribute to HCV transmission; much less is kn ....The hepatitis C virus (HCV) continues to spread among injecting drug users (IDUs) in Australia at a very high rate, despite success in preventing the spread of HIV in the same groups; the complete reasons for this remain unclear. There is an urgent need for the HCV epidemic among IDUs to be contained. To do so, we must better understand the ways in which it is spreading among IDUs. Much is known about risk behaviours of individual IDUs and how they contribute to HCV transmission; much less is known about how these behaviours are modified by the influence of the IDUs peer group, especially their immediate and intimate social networks. Despite its importance in influencing attitudes and behaviours, and therefore HCV transmission, this has never been studied in Australia, nor, in relation to HCV, in the world. We hope that by studying social and risk networks of IDUs we shall discover new ways in which control of the HCV epidemic can be achieved in Australia. We intend to do this among two groups of young IDUs, one of Vietnamese ethnicity, located in the one suburb of Melbourne. By using field techniques for gathering information (ethnography), and sophisticated analytic techniques to understand how these networks are formed and influence behaviours, we hope to be able to identify interventions which work at the level of the social group rather than the individual in bringing about the behaviour change necessary to prevent HCV transmission. To ensure that the risk networks we describe are as influential as they appear, and to discover more about the variability of HCV, we will also be investigating the relationship between the various strains of HCV in members of the IDU networks, particularly as another measure of the connectedness of networks and network members. This will be done using sophisticated genetic analysis of the HCV obtained from network members by blood test.Read moreRead less
Aetiology, Burden And Causal Pathways Of Acute Lower Respiratory Infections Using Population Linked Data
Funder
National Health and Medical Research Council
Funding Amount
$437,476.00
Summary
Lower respiratory, or chest infections, are a problem for many children. This project will investigate the impact of chest infections on hospitals and emergency departments, the viruses and bacteria that cause them, identify those children who are at an increased risk of having chest infections and investigate the impact of routine immunisations on specific types of infections. This project will greatly add to our understanding of chest infections so appropriate interventions can be developed.
The Relationship Between Immune Dysregulation, Infection And Cancer Incidence
Funder
National Health and Medical Research Council
Funding Amount
$380,558.00
Summary
The research aims to better understand the relationship between immune dysfunction, infection and the development of cancer. Established scientific methods will be used to examine the incidence and risk factors for cancer in people with impaired immunity, such as organ transplant recipients, and people with autoimmune disease. This knowledge is important in advancing our understanding of the causes of cancer, and in developing appropriate preventive strategies and health care for these people.
Estimating The Burden Of Group A Streptococcal Diseases In Victoria
Funder
National Health and Medical Research Council
Funding Amount
$386,760.00
Summary
Despite the considerable advances in the diagnosis and treatment of group A streptococcal (GAS) diseases made during the last century, the impressive spectrum of infections caused by this organism continues to have a significant impact in developed countries. This spectrum includes diseases that are mild but common (e.g. sore throat, skin sores), rare but very severe (e.g. bloodstream infections, flesh-eating bacteria) and those that are more common in developing countries and the Aboriginal pop ....Despite the considerable advances in the diagnosis and treatment of group A streptococcal (GAS) diseases made during the last century, the impressive spectrum of infections caused by this organism continues to have a significant impact in developed countries. This spectrum includes diseases that are mild but common (e.g. sore throat, skin sores), rare but very severe (e.g. bloodstream infections, flesh-eating bacteria) and those that are more common in developing countries and the Aboriginal population (e.g. rheumatic fever, kidney disease). Streptococcal sore throat remains one of the most common childhood infections, and severe group A streptococcal diseases are thought to be increasing in incidence in Australia. Yet, there are no accurate data on the incidence and costs of these or other GAS diseases in non-Aboriginal Australians, or in most other populations around the world. It is becoming more urgent to collect this data as numerous vaccine candidates are entering human trials, new approaches to the treatment of sore throat are emerging, and new strategies to treat and control the spread of severe disease are being developed. We propose a comprehensive strategy to measure the incidence, prevalence and costs of each group of GAS diseases. We will follow a group of families for 12 months to detect cases of GAS sore throat and skin sores and measure the impact on the family. We will survey children in schools to estimate the prevalence of skin sores. We will check hospital records to calculate the number of cases of rheumatic fever and kidney disease. And we will maintain surveillance for severe diseases by checking hospital and laboratory records. We will also check to see if family members of people with severe disease have the GAS bacterium in their throats. We will then compile these data into a comprehensive estimate of the burden of disease in Victoria, and estimate the cost-effectiveness of different treatment and prevention strategies.Read moreRead less
Predicting The Risk Of Invasive Candidiasis In Critically Ill Patients
Funder
National Health and Medical Research Council
Funding Amount
$1,258,287.00
Summary
Invasive fungal infections (such as bloodstream infections) are a serious and increasing problem for critically ill patients managed in the Intensive Care Unit. Outcomes can be improved by giving early treatment only to those at highest risk of fungal infection. Our aim is to easily identify those at high-risk. Patients treated in seven major ICUs will be observed and a simple and accurate method of scoring their illness characteristics and amount-types of fungi present will be developed.
Environmental And Genetic Factors In Childhood Acute Lymphoblastic Leukaemia: A Case-control Study.
Funder
National Health and Medical Research Council
Funding Amount
$1,788,500.00
Summary
In most countries, acute lymphoblastic leukaemia is the commonest cancer in children. One in 2000 children will develop this disease before their 15th birthday. New methods of treatment introduced over the last 30 years have resulted in cure for many children. However, one third of children diagnosed with this type of leukaemia still die and, even in those whose lives are saved, cure is achieved at a significant cost to the child, the family and the community. Greater understanding of the develo ....In most countries, acute lymphoblastic leukaemia is the commonest cancer in children. One in 2000 children will develop this disease before their 15th birthday. New methods of treatment introduced over the last 30 years have resulted in cure for many children. However, one third of children diagnosed with this type of leukaemia still die and, even in those whose lives are saved, cure is achieved at a significant cost to the child, the family and the community. Greater understanding of the development of childhood leukaemia may lead to preventive measures. Most children with this type of leukaemia are very young, suggesting that factors to which parents are exposed may affect future children. For this reason, as well as investigating the health and lifestyle of the child, it is essential to study the parents. Recent research suggests an association between the mother's intake of folate during pregnancy and her child's risk of developing the most common type of childhood leukaemia. It is also apparent that genetic differences result in varying abilities to deal with toxins, which may alter the risk of developing some cancers. Diet and lifestyle probably also affect this risk. These observations and interactions need to be examined in greater detail. In this large Australia-wide study specific genes will, for the first time, be examined and analysed in conjunction with rigorous assessment of exposures thought to be related to the development of childhood leukaemia. Results obtained from children with leukaemia and their parents will be compared with those from healthy children and their parents. This study is unique in its attempt to assess gene-environment interactions in Australian children and their parents. It will clarify the role of folate and other potential environmental agents in the development of childhood leukaemia and examine gene variations that may affect cancer risk.Read moreRead less
A Case-cohort Study Of New Risk Factors For Cardiovascular Diseases In Busselton
Funder
National Health and Medical Research Council
Funding Amount
$197,349.00
Summary
Cardiovascular diseases account for about half of all deaths and for considerable use of health care resources. While several risk factors for cardiovascular disease, such as smoking, high blood pressure, high cholesterol, overweight and diabetes, are well-established, these do not fully explain all cardiovascular disease. In recent years, some new potential risk factors for cardiovascular disease have been identified. This study aims to examine these new risk factors in an Australian population ....Cardiovascular diseases account for about half of all deaths and for considerable use of health care resources. While several risk factors for cardiovascular disease, such as smoking, high blood pressure, high cholesterol, overweight and diabetes, are well-established, these do not fully explain all cardiovascular disease. In recent years, some new potential risk factors for cardiovascular disease have been identified. This study aims to examine these new risk factors in an Australian population. Using information collected by the Busselton Health Surveys over the last 20 years, we aim to determine whether people who had these risk factors in 1978 were more likely to develop cardiovascular disease over the following years. Since all the information needed has already been collected in the course of earlier health surveys, this study will be particularly cost-effective. We expect that results from this study will increase our understanding of the causes of cardiovascular disease, and may suggest some simple tests to help identify those people who may be at higher risk of heart disease and most likely to benefit from intervention.Read moreRead less