Development Of Early Warning Systems For Dengue Fever Based On Socio-ecological Factors
Funder
National Health and Medical Research Council
Funding Amount
$327,402.00
Summary
Global climate change has potentially serious effects on the transmission of dengue. An early warning system (EWS) based on socio-ecological factors will be developed to examine where and when outbreaks of dengue are likely to occur and how the future dengue control strategies and prevention efforts need to be applied and strengthened in Australia. This project will provide a platform for future research on developing and implementing an EWS for dengue in the Asia-Pacific region.
Substandard Bed Nets And Malaria: Causes, Impact And Solutions
Funder
National Health and Medical Research Council
Funding Amount
$827,057.00
Summary
Long-lasting insecticidal nets (LLIN) are a cornerstone of malaria control. LLIN undergo strict testing overseen by WHO and are subject to inspections prior to delivery to recipient countries. Despite this, we found that LLINs delivered to Papua New Guinea (PNG) between 2013 and 2019 were ineffective against malaria mosquitoes. Concurrently we observed a massive rise in malaria in PNG. This study is aimed at understanding the causes and impact of substandard LLINs on the global malaria burden.
Optimisation Of Wolbachia Based Control Strategies To Reduce Dengue Incidence And Disease
Funder
National Health and Medical Research Council
Funding Amount
$6,073,640.00
Summary
The project will build on recent advances in the use of Wolbachia infected mosquitoes to limit dengue transmission. Key outcomes will include improved understanding of Wolbachia spread after release, development of techniques for regional spread, understanding the epidemiology of dengue transmission in Vietnam and preparing a panel of new Wolbachia:A. aegypti strain combinations for evaluation for implementation programs.
NHMRC Asia Pacific Centre For Innovative Dengue Prevention
Funder
National Health and Medical Research Council
Funding Amount
$2,753,925.00
Summary
World Health Organization estimates dengue incidence at around 50 million cases annually with increased frequency & severity of outbreaks in north Queensland over the last decade being mirrored around the world. The NHMRC Asia Pacific Centre for Innovative Dengue Prevention will be a world leading research facility, co-supported by Bill and Melinda Gates Foundation Grand Challenges in Global Health, focussed on the discovery and implementation of innovative methods to eliminate dengue.
Dengue, Zika and Chikungunya are viral diseases transmitted to humans by mosquitoes. Our research uses a naturally-occurring bacteria, Wolbachia, to stop mosquitoes transmitting these viruses to humans. Our proposal addresses critical knowledge gaps in the biology of mosquitoes and Wolbachia to enable large-scale field-deployment optimisation in affected countries. The outcome of our research will immediately translate to disease control efforts in northern Australia, Asia and Latin America.
Early Diagnosis And Prognosis Of Severe Dengue In Vietnamese Children
Funder
National Health and Medical Research Council
Funding Amount
$689,323.00
Summary
Dengue is a mosquito-borne viral infection. Tropical Australia has experienced multiple outbreaks of dengue in the last decade. This project, conducted in Ho Chi Minh City, Viet Nam, will define the accuracy of a rapid diagnostic test for the early diagnosis of severe dengue. In doing so, we will also derive an algorithm using simple laboratory and clinical findings that can help identify those patients at greatest risk of severe complications, with benefits for both patients and hospitals.
Wolbachia And West Nile Virus In Mosquitoes: Friends Or Foes?
Funder
National Health and Medical Research Council
Funding Amount
$561,028.00
Summary
Mosquito-borne viruses pose a great risk to human and animal health. Presence of compentent vectors of several viruses in Australia indicates vulnerability of Australia’s biosecurity. This project will define the mechanisms of inhibition of virus replication in mosquitoes by a symbiotic bacterium which can be utilized in virus inhibition.
Role Of Flavivirus-encoded Small Regulatory RNAs In Virus-mosquito Vector Interactions
Funder
National Health and Medical Research Council
Funding Amount
$547,216.00
Summary
Mosquito-borne diseases are major threats to human health. MicroRNAs are small non-coding ribonucleic acids (RNAs) that play important roles in development, cancer, apoptosis, immunity, longevity, and viral infections. We propose to identify the regulatory microRNAs from flaviviruses and establish their potential function in vector-arboviruses interactions. The project will put Australia at the forefront of research in the most rapidly developing area of microRNA research.
Population Dynamics And Evolution Of Mosquitoes That Transmit Malaria
Funder
National Health and Medical Research Council
Funding Amount
$381,807.00
Summary
Population dynamics and evolutionary process are fundamental to mosquito-borne infectious diseases as evolutionary forces steer both mosquito and malaria parasite to evolve around obstacles in their natural development. Environmental and ecological factors also influence the relationship between mosquito, parasite and humans. Therefore control of mosquito borne disease depends on an innate understanding of the genetics, behavior and environment. Thus studies on mosquito population dynamics inclu ....Population dynamics and evolutionary process are fundamental to mosquito-borne infectious diseases as evolutionary forces steer both mosquito and malaria parasite to evolve around obstacles in their natural development. Environmental and ecological factors also influence the relationship between mosquito, parasite and humans. Therefore control of mosquito borne disease depends on an innate understanding of the genetics, behavior and environment. Thus studies on mosquito population dynamics including population densities, migration, population subdivisions and competition for resources will allow an understanding of these relationships. Island populations of malaria transmitting mosquitoes contain less genetic complexity (genetic variation in mosquito subpopulations) than mainland populations. Thus mosquito island populations may not contain the genetic capability of evolving around detrimental selection pressures such as the use of insecticides or predators. Armed with accurate knowledge of genetic complexity, biology and behavior of mosquito disease vector species, control measures can be accurately focused at specific populations (high disease transmission mosquito populations). This project we will identify specific populations of mosquitoes using their DNA to reveal genetic markers for specific behavior traits. Due to the smaller amount of genetic variations that island mosquito populations contain, and our aquired knowledge of their behavior and biology. We will design focused mosquito control strategies with knowledge that the mosquitoes will have a smaller chance of evolving around these control measures.Read moreRead less
Novel Use Of Fungal Entomopathogens For Sustainable Control Of Mosquito-borne Viruses
Funder
National Health and Medical Research Council
Funding Amount
$605,993.00
Summary
Mosquito-born viruses such as Dengue, Ross River and Barmah Forest are increasing in regional significance. At a broader scale, an estimated 2.5 billion people live in areas at risk of epidemic Dengue transmission. Chemical insecticides are the mainstay of current mosquito control throughout many parts of the world. However, problems of insecticide resistance, environmental contamination and risks to human health, mean that chemical pesticides have not provided a universal solution, either as ou ....Mosquito-born viruses such as Dengue, Ross River and Barmah Forest are increasing in regional significance. At a broader scale, an estimated 2.5 billion people live in areas at risk of epidemic Dengue transmission. Chemical insecticides are the mainstay of current mosquito control throughout many parts of the world. However, problems of insecticide resistance, environmental contamination and risks to human health, mean that chemical pesticides have not provided a universal solution, either as outdoor sprays, residual house sprays or as insecticide treated nets. This creates a pressing need for practical alternatives. Building on approaches and technologies developed for control of locusts in Australia and Africa, we have recently discovered that the ability of mosquitoes to transmit malaria can be substantially reduced with insect fungal pathogens used as biological pesticides. We found that exposure to biopesticide-treated surfaces reduced the number of mosquitoes able to transmit malaria 80-fold. Other supporting data from semi-field trials confirm the feasibility of infecting mosquitoes under real field conditions. Together, these results represent a significant advance in the development of a cheap and sustainable biological alternative to chemical insecticides for disease control. We now wish to extend this research to explore the potential for use of fungal pathogens in control of mosquito-borne viruses. Preliminary studies already confirm that we can infect the key mosquito species responsible for transmitting Dengue. The aim of the current project is to conduct a more comprehensive evaluation of a wider range of fungal isolates to identify strains with the greatest potential to stop transmission of mosquito-borne viruses. The longer term goal is to translate this research into a practical product. Such a product would offer a cheap, environmentally friendly disease control measure, with reduced potential for resistance evolution.Read moreRead less