Assessment Of Interventions For Controlling Pandemic Influenza And Determining Data Needs To Inform These Assessments
Funder
National Health and Medical Research Council
Funding Amount
$183,040.00
Summary
The aim of this study is to help us prepare for a pandemic of influenza by comparing how effective the various available control strategies are at reducing transmission of the disease. The available control interventions include: reducing the number of close contacts we make with others, isolating cases after they are diagnosed, closing schools, quarantining households, quarantining individuals who are known to have been exposed to a case, and using antiviral drugs treat and protect people at ri ....The aim of this study is to help us prepare for a pandemic of influenza by comparing how effective the various available control strategies are at reducing transmission of the disease. The available control interventions include: reducing the number of close contacts we make with others, isolating cases after they are diagnosed, closing schools, quarantining households, quarantining individuals who are known to have been exposed to a case, and using antiviral drugs treat and protect people at risk of being infected. We will compare these control measures by taking due account of the ability and resources available for these interventions, and with regard to the need to maintain essential services. The comparisons will be made using mathematical models that describe the transmission of the infection. All available data and advice from experts will be used to ensure that realistic models are used for the comparisons. We will also use the models to determine the best use of the limited antiviral drugs available, until a vaccine becomes available. We will consider how the control strategy should be changed if a strain develops that is resistant to the antiviral drugs. In addition, we will determine what data need to be collected during the early stages of a pandemic to help us to determine the best use of the antiviral drugs, the best use of a new vaccine and to check on the development of resistance to the antiviral drugs.Read moreRead less
Studies On The Activation And Immunogenicity Of The HIV-1 Glycoproteins, Gp120-gp41
Funder
National Health and Medical Research Council
Funding Amount
$606,438.00
Summary
More than 34 million people were living with HIV-1 in 2011 with ~7,000 new infections still occurring daily. A prophylactic vaccine for HIV-1 is needed to stop its transmission, however, this goal is yet to be achieved. Our proposed studies will inform the design of prophylactic HIV-1 vaccines that act by making antibodies that neutralize the virus.
Immunological Changes During Pregnancy And The Impact On Viral Hepatitis Infection
Funder
National Health and Medical Research Council
Funding Amount
$353,355.00
Summary
Hepatitis B virus (HBV) can cause long term health problems particularly affecting the liver and can be passed from mother to baby. Despite the availability of a HBV vaccine babies can still become infected. During pregnancy there are changes in a woman’s immune system which may impact on HBV infection and make transmission to the baby more likely. This research aims to explore the changes in a woman’s immune system and the impact this has on risks for hepatitis and transmission to the baby.
Modelling The Biology And Transmission Of Influenza Virus - Learning From 1918-19 And Other Outbreaks
Funder
National Health and Medical Research Council
Funding Amount
$114,222.00
Summary
In preparing for a future pandemic of influenza, it is important to learn as much as possible from what happened in the past, particularly from the devastating pandemic of 1918-19. This project will collate detailed information about the spread of influenza in past outbreaks and create a publicly accessible data-base. Mathematical methods will be used to analyse historic and contemporary data, so as to provide better understanding of the spread of influenza, and of the likely effects of social a ....In preparing for a future pandemic of influenza, it is important to learn as much as possible from what happened in the past, particularly from the devastating pandemic of 1918-19. This project will collate detailed information about the spread of influenza in past outbreaks and create a publicly accessible data-base. Mathematical methods will be used to analyse historic and contemporary data, so as to provide better understanding of the spread of influenza, and of the likely effects of social and medical measures for its control. An important theme of the project is to consolidate our knowledge about how past exposure to non-pandemic influenza could provide short-lived protection against any new pandemic, and to explore the implications of this for prevention today. Another theme is to explore the severity of influenza during pandemics, and to identify social and medical factors that might reduce the dose of virus transmitted, or otherwise reduce the severity of infection. The insights from the modeling will also help to identify gaps in knowledge and understanding about the basic biology of influenza, stimulate new research to fill those gaps, and thus offer the prospect of more effective vaccines and treatments for the future control of influenza.Read moreRead less
Elucidating The Activation Mechanism Of The HIV-1 Envelope Glycoproteins, Gp120-gp41
Funder
National Health and Medical Research Council
Funding Amount
$636,973.00
Summary
Antiretrovirals prolong the life of HIV+ people, however toxicity and resistance issues persist. We aim to understand how the HIV surface proteins effect viral entry in order to identify new antiviral targets.
Multiple Cytomegalovirus Infections: Biological And Evolutionary Significance.
Funder
National Health and Medical Research Council
Funding Amount
$555,776.00
Summary
This project involves the study of cytomegalovirus (CMV) a common viral infection of humans which normally cause little disease. However in individuals whose immune system is suppressed (such as AIDS patients or transplant recipients), or in infection of pregnant women, CMV can cause serious or life-threatening disease in the patient or foetus. An interesting feature of CMV diseases in such patients is that enhanced viral growth and more severe disease is frequently associated with the presence ....This project involves the study of cytomegalovirus (CMV) a common viral infection of humans which normally cause little disease. However in individuals whose immune system is suppressed (such as AIDS patients or transplant recipients), or in infection of pregnant women, CMV can cause serious or life-threatening disease in the patient or foetus. An interesting feature of CMV diseases in such patients is that enhanced viral growth and more severe disease is frequently associated with the presence of multiple strains of CMV in the patient. We suggest that mixed CMV infections provide a survival advantage to the virus, with different strains within the mixed infection assisting the growth of other strains. This would result in increased virus growth overall, and enhanced disease. To study the mechanisms by which multiple infections with different CMV strains may affect both the virus and the host, experiments will be performed using an animal model of CMV, murine cytomegalovirus (MCMV). We will examine the effect of the presence of multiple strains of virus on virus growth and distribution within the infected host. We will also determine if functional MCMV strains are capable of assisting non-functional strains to survive within the host. These studies are relevant to the design of a CMV vaccine, and will be valuable in revealing the ways in which viruses can co-operate within an infection.Read moreRead less
The HITS Study: Modes Of Transmission, Natural History And Determinants Of Outcome From Primary Hepatitis C Infection
Funder
National Health and Medical Research Council
Funding Amount
$948,250.00
Summary
Hepatitis C (HCV) affects approximately 200,000 Australians, of whom a significant minority develop long term complications, including cirrhosis, liver failure and liver cancer. The dominant mode of transmission of this virus is via blood-to-blood contact, particularly via injecting drug use. Prisons appear to be a key focus of transmission of hepatitis C in the community as the majority of inmates are incarcerated for drug-related crimes, and injecting drug use remains prevalent whilst in priso ....Hepatitis C (HCV) affects approximately 200,000 Australians, of whom a significant minority develop long term complications, including cirrhosis, liver failure and liver cancer. The dominant mode of transmission of this virus is via blood-to-blood contact, particularly via injecting drug use. Prisons appear to be a key focus of transmission of hepatitis C in the community as the majority of inmates are incarcerated for drug-related crimes, and injecting drug use remains prevalent whilst in prison. In addition, as almost one in two inmates are already infected at the time of incarceration, those who are uninfected appear to be at significant risk of becoming infected through other (non-injecting) routes such as tattooing, fights and other coincidental blood exposures. This application seeks support for the HITS study (Hepatitis C Incidence and Transmission in Prisons study) - a prospective cohort study of inmates of NSW prisons. Following a successful pilot in which the substantial bureaucratic and logistical hurdles were resolved, the main cohort has been enroling since late 2000. The initial data have confirmed a high rate of at risk behaviour amongst inmates and three primary HCV infections acquired in prison have been documented featuring an unusual antibody negative pattern which would typically pass undetected in screening assays for HCV infection. After exposure to HCV and the development of primary infection, approximately one in five individuals successfully resolves the infection and clears the virus, presumably via an efficient immune response or a non-virulent virus, or a combination of these factors. Therefore, in addition to the public health aspects of the HITS study, the research also aims to define the immunological and virological factors which allow clearance of HCV. These studies will provide key information to guide treatment and immunisation strategies against hepatitis C.Read moreRead less
HIV/AIDS remains a major global threat with ?37 million individuals living with HIV in 2014. Antiretroviral drugs have transformed HIV from a death sentence into a chronic disease. Public health organisations recommend dramatic scale up of drugs for HIV treatment and prevention. However, a major threat is that drug options will be exhausted in the long-term due to drug resistance and toxicity. The major aim of this study is to advance the development of an entirely new drug class for HIV.
Topical microbicides are urgently required to protect women from the sexual transmission of HIV. Lactic acid is produced by bacteria that are normally present in the healthy female vaginal tract and is more potent in the inactivation of HIV compared to low pH alone. This study seeks to determine how lactic acid inactivates HIV and to undertake laboratory studies to determine its suitability for development as a topical microbicide to prevent HIV transmission.