Identifying Key Players In The Spread Of Antimicrobial Resistance
Funder
National Health and Medical Research Council
Funding Amount
$817,448.00
Summary
Antibiotic drugs are essential to treat bacterial infections. However some bacteria have genes that allow them to resist certain drugs, which can be transferred among bacteria to create 'superbugs' that can resist nearly all the drugs we have. This project investigates the transfer of drug resistance genes between Gram negative bacteria (common agents of food poisoning, hospital infection, UTI, etc) and aims to identify the bacteria and genes most important in the spread of superbugs in Australi ....Antibiotic drugs are essential to treat bacterial infections. However some bacteria have genes that allow them to resist certain drugs, which can be transferred among bacteria to create 'superbugs' that can resist nearly all the drugs we have. This project investigates the transfer of drug resistance genes between Gram negative bacteria (common agents of food poisoning, hospital infection, UTI, etc) and aims to identify the bacteria and genes most important in the spread of superbugs in Australia.Read moreRead less
How Are Klebsiella Pneumoniae Infections Acquired In Hospital?
Funder
National Health and Medical Research Council
Funding Amount
$496,228.00
Summary
Klebsiella pneumoniae (Kp) bacteria are among the top causes of hospital infections and are often resistant to a wide range of antibiotics. While some hospital bugs are well-studied, we are considerably behind in our understanding of Kp, which can be carried in our bodies as a commensal without causing disease. Bacterial genomics will be used to dissect how Kp infections are acquired in hospital, including investigating the evidence for hospital transmission and the role of commensal carriage in ....Klebsiella pneumoniae (Kp) bacteria are among the top causes of hospital infections and are often resistant to a wide range of antibiotics. While some hospital bugs are well-studied, we are considerably behind in our understanding of Kp, which can be carried in our bodies as a commensal without causing disease. Bacterial genomics will be used to dissect how Kp infections are acquired in hospital, including investigating the evidence for hospital transmission and the role of commensal carriage in causing serious hospital infections.Read moreRead less
Interrogation Of Streptococcal Genomic Epidemiology Within Disease Endemic Regions
Funder
National Health and Medical Research Council
Funding Amount
$325,896.00
Summary
Group A streptococcal (GAS) bacterial infections within the Indigenous populations of Northern Australia are amongst the highest in the world. This project uses comparative bacterial genomics to examine current and historical outbreaks of GAS disease in Northern Australia relative to globally sourced GAS. This will be used to examine the spread of disease causing GAS between remote communities as well as investigating genetic markers of disease and informing therapeutic interventions.
Origins And Relationships Of Shigella And Enteroinvasive Escherichia Coli
Funder
National Health and Medical Research Council
Funding Amount
$377,310.00
Summary
Shigella is a well known highly infectious human pathogen with as few as 10 cells allowing effective spread by infected food or water, and also by person to person contact. Shigellosis is a particularly significant disease for children due to lack of pre-existing immunity and greater chance of transfer by fecal-oral route. One group of E. coli called Enteroinvasive E. coli (EIEC) resembles Shigella in many aspects from disease symptoms to biochemical properties. EIEC is a major cause of diarrhoe ....Shigella is a well known highly infectious human pathogen with as few as 10 cells allowing effective spread by infected food or water, and also by person to person contact. Shigellosis is a particularly significant disease for children due to lack of pre-existing immunity and greater chance of transfer by fecal-oral route. One group of E. coli called Enteroinvasive E. coli (EIEC) resembles Shigella in many aspects from disease symptoms to biochemical properties. EIEC is a major cause of diarrhoea in less developed countries and has also caused large outbreaks in developed countries. It is now clear that Shigella and E. coli are really one species. EIEC and Shigella strains are variants of E. coli with humans as the only host. However separation of the two in all records and most studies means that there is no integrated understanding of the forms. We aim to study the relationships of Shigella and EIEC and expect significant insights into the origins of Shigella-EIEC. This will facilitate diagnosis and understanding of the disease(s) and lead to a far better classification . EIEC-Shigella strains have arisen from other E. coli independently. This has happened seven times in the derivation of Shigella and we expect more such events with EIEC. An interesting phenomenon during this process is that strains tend to lose metabolic functions. In this study we will look at what, why and how functions are lost. O antigens are important in evading the host immune system. Shigella strains obtained many O antigens, the majority apparently from other species. This is quite likely the key to its success. We will look at how Shigella obtained new O antigens. This project will be significant in the understanding of Shigell-EIEC, a very significant human pathogen, and in general for understanding emergence of new pathogens.Read moreRead less
Genomics For Combating Antimicrobial Resistant Bacterial Pathogens
Funder
National Health and Medical Research Council
Funding Amount
$2,027,364.00
Summary
Applying genomics to bacterial pathogens is revolutionising the way we understand infectious diseases and antimicrobial resistance (AMR). There is a major opportunity to now bring the technology into routine clinical and public health practice. This research program will investigate and deliver the technology of pathogen genomics directly into public health disease surveillance, outbreak detection and the diagnosis and response to infectious diseases and AMR in hospitalised patients.
Using Genetic Tools To Study Helicobacter Pylori Pathogenesis And Persistence
Funder
National Health and Medical Research Council
Funding Amount
$316,449.00
Summary
H. pylori infection is the leading cause of gastric ulcer disease and stomach cancer. In light of emerging antibiotic resistance and failed vaccine trials, alternative therapies are needed to treat this lifelong infection. This project aims to develop tools to identify and characterize genes required by H. pylori for infection which will serve as new drug targets. This new knowledge will also contribute to a better understanding of the persistence of this and other bacteria.
Expression And Secretion Of Large Clostridial Toxins From The Pathogenic Clostridia.
Funder
National Health and Medical Research Council
Funding Amount
$332,258.00
Summary
The large clostridial toxins are an important family of bacterial virulence factors that includes toxins from many disease-causing clostridial species. Despite their impact on public health, pathogenesis of disease caused by these bacteria is poorly understood. We will analyse how these bacteria regulate the production and secretion of the large toxins, which will give us a better understanding of the mechanisms of disease causation as well as identifying novel common therapeutic targets.
The Role Of Clostridium Difficile Spore Interactions With The Host In Gastrointestinal Infection And Disease
Funder
National Health and Medical Research Council
Funding Amount
$511,467.00
Summary
Hospital-acquired infections with the bacterium Clostridium difficile are a major global public health concern with highly virulent isolates emerging overseas in 2002 and in Australia in 2010. These have spread through our hospitals and are also found in the community. This project will increase our understanding of how these strains cause severe gut disease, which is critical for the development of improved strategies for preventing and treating these infections and reducing antibiotic use.
The Impact Of Clostridium Difficile Infection And The Host Immune Response On Colonic Homeostasis And Regeneration.
Funder
National Health and Medical Research Council
Funding Amount
$932,212.00
Summary
Hospital-acquired infections with the bacterium Clostridium difficile are a major global public health concern with highly virulent isolates emerging overseas in 2002 and in Australia in 2010. These have spread through our hospitals and are also found in the community. This project will increase our understanding of how these strains cause severe gut disease, which is critical for the development of improved strategies for preventing and treating these infections and reducing antibiotic use.
How A Multidrug Resistant Bacterial Pathogen Has Become Pandemic
Funder
National Health and Medical Research Council
Funding Amount
$1,116,544.00
Summary
The pandemic spread of antibiotic resistant E. coli ST131 is a major human health problem. ST131 is the globally dominant cause of urinary tract and bloodstream infections. This project will use advanced genetics and animal infection models to understand the features of ST131 that have fueled its global dominance. The outcomes will unravel the molecular mechanisms that enable ST131 to persist and cause repeat infection, and guide the development of new precision medicine therapeutics.