Understanding the importance of variation in the capsular polysaccharide of Streptococcus pneumoniae

Research Opportunity
Masters by Research, Honours
Department
Microbiology and Immunology
Location
Doherty Institute
Primary Supervisor Email Number Webpage
Associate Professor Catherine Satzke catherine.satzke@mcri.edu.au Personal web page
Co-supervisor Email Number Webpage
Dr Sam Manna

Summary Streptococcus pneumoniae (the pneumococcus) is a leading cause of morbidity and mortality worldwide. Over 90 immunologically-distinct serotypes are known, defined by their unique capsular polysaccharide.

Project Details

Streptococcus pneumoniae (the pneumococcus) is a leading cause of morbidity and mortality worldwide. Over 90 immunologically-distinct serotypes are known, defined by their unique capsular polysaccharide. Decisions around which serotypes are included in licensed vaccines have largely been based on data from high-income countries. These vaccines have subsequently been introduced into low and middle-income countries (LMICs), where limited local information on serotype prevalence and diversity is often available. Using DNA microarray, we have identified pneumococci from LMICs with significant genetic variation in the capsule locus. Some of this variation is predicted to change the capsule structure, indicating there is potential for undiscovered serotypes and/or the misidentification of existing serotypes. This project will focus on the identification and characterisation of these variants. This includes the molecular basis of the variation and potential for mistyping, and also the relevance of such changes to the capsule on pneumococcal pathogenesis. Key approaches to this project include genetic manipulation of pneumococcal isolates, experiments with DNA and RNA, capsular typing of pneumococcal isolates as well as conducting functional assays in vitro. Your work in helping us uncover these novel variants (and potentially new serotypes) will allow us to improve serological and molecular tools for their detection, which will be vital for accurately assessing vaccine impact and serotype replacement globally.



Faculty Research Themes

Infection and Immunology

School Research Themes

Infection & Immunity



Research Opportunities

Masters by Research, Honours
Students who are interested in joining this project will need to consider their elegibility as well as other requirements before contacting the supervisor of this research

Graduate Research application

Honours application

Key Contact

For further information about this research, please contact a supervisor.

Department

Microbiology and Immunology

Research Node

Doherty Institute

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