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Mu A, Klare WP, Baines SL, Ignatius Pang CN, Guérillot R, Harbison-Price N, Keller N, Wilksch J, Nhu NTK, Phan MD, Keller B, Nijagal B, Tull D, Dayalan S, Chua HHC, Skoneczny D, Koval J, Hachani A, Shah AD, Neha N, Jadhav S, Partridge SR, Cork AJ, Peters K, Bertolla O, Brouwer S, Hancock SJ, Álvarez-Fraga L, De Oliveira DMP, Forde B, Dale A, Mujchariyakul W, Walsh CJ, Monk I, Fitzgerald A, Lum M, Correa-Ospina C, Roy Chowdhury P, Parton RG, De Voss J, Beckett J, Monty F, McKinnon J, Song X, Stephen JR, Everest M, Bellgard MI, Tinning M, Leeming M, Hocking D, Jebeli L, Wang N, Ben Zakour N, Yasar SA, Vecchiarelli S, Russell T, Zaw T, Chen T, Teng D, Kassir Z, Lithgow T, Jenney A, Cole JN, Nizet V, Sorrell TC, Peleg AY, Paterson DL, Beatson SA, Wu J, Molloy MP, Syme AE, Goode RJA, Hunter AA, Bowland G, West NP, Wilkins MR, Djordjevic SP, Davies MR, Seemann T, Howden BP, Pascovici D, Tyagi S, Schittenhelm RB, De Souza DP, McConville MJ, Iredell JR, Cordwell SJ, Strugnell RA, Stinear TP, Schembri MA, Walker MJ. Integrative omics identifies conserved and pathogen-specific responses of sepsis-causing bacteria. Nat Commun 2023; 14:1530. [PMID: 36934086 PMCID: PMC10024524 DOI: 10.1038/s41467-023-37200-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 03/06/2023] [Indexed: 03/20/2023] Open
Abstract
Even in the setting of optimal resuscitation in high-income countries severe sepsis and septic shock have a mortality of 20-40%, with antibiotic resistance dramatically increasing this mortality risk. To develop a reference dataset enabling the identification of common bacterial targets for therapeutic intervention, we applied a standardized genomic, transcriptomic, proteomic and metabolomic technological framework to multiple clinical isolates of four sepsis-causing pathogens: Escherichia coli, Klebsiella pneumoniae species complex, Staphylococcus aureus and Streptococcus pyogenes. Exposure to human serum generated a sepsis molecular signature containing global increases in fatty acid and lipid biosynthesis and metabolism, consistent with cell envelope remodelling and nutrient adaptation for osmoprotection. In addition, acquisition of cholesterol was identified across the bacterial species. This detailed reference dataset has been established as an open resource to support discovery and translational research.
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Affiliation(s)
- Andre Mu
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Wellcome Sanger Institute, Hinxton, UK
| | - William P Klare
- Charles Perkins Centre and School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, Australia
| | - Sarah L Baines
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - C N Ignatius Pang
- Ramaciotti Centre for Genomics, School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
- Bioinformatics Group, Children's Medical Research Institute, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Romain Guérillot
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Nichaela Harbison-Price
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Nadia Keller
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
| | - Jonathan Wilksch
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Nguyen Thi Khanh Nhu
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Minh-Duy Phan
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Bernhard Keller
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Brunda Nijagal
- Metabolomics Australia, Bio21 Institute, The University of Melbourne, Melbourne, Australia
| | - Dedreia Tull
- Metabolomics Australia, Bio21 Institute, The University of Melbourne, Melbourne, Australia
| | - Saravanan Dayalan
- Metabolomics Australia, Bio21 Institute, The University of Melbourne, Melbourne, Australia
| | - Hwa Huat Charlie Chua
- Metabolomics Australia, Bio21 Institute, The University of Melbourne, Melbourne, Australia
| | - Dominik Skoneczny
- Metabolomics Australia, Bio21 Institute, The University of Melbourne, Melbourne, Australia
| | - Jason Koval
- Ramaciotti Centre for Genomics, School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Abderrahman Hachani
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Anup D Shah
- Monash Proteomics and Metabolomics Facility, Monash Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - Nitika Neha
- Metabolomics Australia, Bio21 Institute, The University of Melbourne, Melbourne, Australia
| | - Snehal Jadhav
- Metabolomics Australia, Bio21 Institute, The University of Melbourne, Melbourne, Australia
| | - Sally R Partridge
- Centre for Infectious Diseases and Microbiology, Westmead Hospital/ Westmead Institute, and Sydney ID, University of Sydney, Sydney, NSW, Australia
| | - Amanda J Cork
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Kate Peters
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Olivia Bertolla
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Stephan Brouwer
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Steven J Hancock
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
| | - Laura Álvarez-Fraga
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
| | - David M P De Oliveira
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Brian Forde
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
| | - Ashleigh Dale
- Charles Perkins Centre and School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, Australia
| | - Warasinee Mujchariyakul
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Calum J Walsh
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Ian Monk
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | | | - Mabel Lum
- Bioplatforms Australia Ltd., Sydney, NSW, Australia
| | - Carolina Correa-Ospina
- Ramaciotti Centre for Genomics, School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Piklu Roy Chowdhury
- Australian Institute for Microbiology and Infection, University of Technology Sydney, Sydney, NSW, Australia
| | - Robert G Parton
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
- Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, QLD, Australia
| | - James De Voss
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
| | - James Beckett
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
| | - Francois Monty
- Australian Genome Research Facility Ltd., Melbourne, VIC, Australia
| | - Jessica McKinnon
- Australian Institute for Microbiology and Infection, University of Technology Sydney, Sydney, NSW, Australia
| | - Xiaomin Song
- Australian Proteome Analysis Facility, Macquarie University, Sydney, Australia
| | - John R Stephen
- Australian Genome Research Facility Ltd., Melbourne, VIC, Australia
| | - Marie Everest
- Australian Genome Research Facility Ltd., Melbourne, VIC, Australia
| | - Matt I Bellgard
- Office of eResearch, Queensland University of Technology, Brisbane, QLD, Australia
- Center for Comparative Genomics, Murdoch University, Perth, WA, Australia
| | - Matthew Tinning
- Australian Genome Research Facility Ltd., Melbourne, VIC, Australia
| | - Michael Leeming
- Metabolomics Australia, Bio21 Institute, The University of Melbourne, Melbourne, Australia
| | - Dianna Hocking
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Leila Jebeli
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Nancy Wang
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Nouri Ben Zakour
- Centre for Infectious Diseases and Microbiology, Westmead Hospital/ Westmead Institute, and Sydney ID, University of Sydney, Sydney, NSW, Australia
| | - Serhat A Yasar
- Ramaciotti Centre for Genomics, School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Stefano Vecchiarelli
- Ramaciotti Centre for Genomics, School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Tonia Russell
- Ramaciotti Centre for Genomics, School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Thiri Zaw
- Australian Proteome Analysis Facility, Macquarie University, Sydney, Australia
| | - Tyrone Chen
- Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Don Teng
- Metabolomics Australia, Bio21 Institute, The University of Melbourne, Melbourne, Australia
| | - Zena Kassir
- Ramaciotti Centre for Genomics, School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Trevor Lithgow
- Centre to Impact AMR and Infection Program, Monash Biomedicine Discovery Institute and Department of Microbiology, Monash University, Melbourne, VIC, Australia
| | - Adam Jenney
- Centre to Impact AMR and Infection Program, Monash Biomedicine Discovery Institute and Department of Microbiology, Monash University, Melbourne, VIC, Australia
| | - Jason N Cole
- Department of Pediatrics, School of Medicine, University of California at San Diego, La Jolla, CA, 92093, USA
- Skaggs School of Pharmaceutical Sciences, University of California at San Diego, La Jolla, CA, 92093, USA
| | - Victor Nizet
- Department of Pediatrics, School of Medicine, University of California at San Diego, La Jolla, CA, 92093, USA
- Skaggs School of Pharmaceutical Sciences, University of California at San Diego, La Jolla, CA, 92093, USA
| | - Tania C Sorrell
- Centre for Infectious Diseases and Microbiology, Westmead Hospital/ Westmead Institute, and Sydney ID, University of Sydney, Sydney, NSW, Australia
| | - Anton Y Peleg
- Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, VIC, Australia
- Centre to Impact AMR and Infection Program, Monash Biomedicine Discovery Institute and Department of Microbiology, Monash University, Melbourne, VIC, Australia
| | - David L Paterson
- Centre for Clinical Research, The University of Queensland, Brisbane, QLD, Australia
| | - Scott A Beatson
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
| | - Jemma Wu
- Australian Proteome Analysis Facility, Macquarie University, Sydney, Australia
| | - Mark P Molloy
- Australian Proteome Analysis Facility, Macquarie University, Sydney, Australia
| | - Anna E Syme
- Melbourne Bioinformatics, The University of Melbourne, Melbourne, VIC, Australia
| | - Robert J A Goode
- Monash Proteomics and Metabolomics Facility, Monash Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
- Commonwealth Scientific and Industrial Research Organisation, Clayton, VIC, Australia
| | - Adam A Hunter
- Center for Comparative Genomics, Murdoch University, Perth, WA, Australia
| | - Grahame Bowland
- Center for Comparative Genomics, Murdoch University, Perth, WA, Australia
| | - Nicholas P West
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
| | - Marc R Wilkins
- Ramaciotti Centre for Genomics, School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Steven P Djordjevic
- Australian Institute for Microbiology and Infection, University of Technology Sydney, Sydney, NSW, Australia
| | - Mark R Davies
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Torsten Seemann
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Benjamin P Howden
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Dana Pascovici
- Australian Proteome Analysis Facility, Macquarie University, Sydney, Australia
| | - Sonika Tyagi
- Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Ralf B Schittenhelm
- Monash Proteomics and Metabolomics Facility, Monash Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - David P De Souza
- Metabolomics Australia, Bio21 Institute, The University of Melbourne, Melbourne, Australia
| | - Malcolm J McConville
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, VIC, Australia
| | - Jonathan R Iredell
- Centre for Infectious Diseases and Microbiology, Westmead Hospital/ Westmead Institute, and Sydney ID, University of Sydney, Sydney, NSW, Australia
| | - Stuart J Cordwell
- Charles Perkins Centre and School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, Australia
| | - Richard A Strugnell
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Timothy P Stinear
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Mark A Schembri
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Mark J Walker
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia.
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia.
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4
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Davies MR, Duchene S, Valcanis M, Jenkins AP, Jenney A, Rosa V, Hayes AJ, Strobel AG, McIntyre L, Lacey JA, Klemm EJ, Wong VK, Sahukhan A, Thomson H, Page A, Hocking D, Wang N, Tudravu L, Rafai E, Dougan G, Howden BP, Crump JA, Mulholland K, Strugnell RA. Genomic epidemiology of Salmonella Typhi in Central Division, Fiji, 2012 to 2016. Lancet Reg Health West Pac 2022; 24:100488. [PMID: 35769175 PMCID: PMC9234096 DOI: 10.1016/j.lanwpc.2022.100488] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
BACKGROUND Typhoid fever is endemic in some Pacific Island Countries including Fiji and Samoa yet genomic surveillance is not routine in such settings. Previous studies suggested imports of the global H58 clade of Salmonella enterica var Typhi (Salmonella Typhi) contribute to disease in these countries which, given the MDR potential of H58, does not auger well for treatment. The objective of the study was to define the genomic epidemiology of Salmonella Typhi in Fiji. METHODS Genomic sequencing approaches were implemented to study the distribution of 255 Salmonella Typhi isolates from the Central Division of Fiji. We augmented epidemiological surveillance and Bayesian phylogenomic approaches with a multi-year typhoid case-control study to define geospatial patterns among typhoid cases. FINDINGS Genomic analyses showed Salmonella Typhi from Fiji resolved into 2 non-H58 genotypes with isolates from the two dominant ethnic groups, the Indigenous (iTaukei) and non-iTaukei genetically indistinguishable. Low rates of international importation of clones was observed and overall, there were very low levels an antibiotic resistance within the endemic Fijian typhoid genotypes. Genomic epidemiological investigations were able to identify previously unlinked case clusters. Bayesian phylodynamic analyses suggested that genomic variation within the larger endemic Salmonella Typhi genotype expanded at discreet times, then contracted. INTERPRETATION Cyclones and flooding drove 'waves' of typhoid outbreaks in Fiji which, through population aggregation, poor sanitation and water safety, and then mobility of the population, spread clones more widely. Minimal international importations of new typhoid clones suggest that targeted local intervention strategies may be useful in controlling endemic typhoid infection. These findings add to our understanding of typhoid transmission networks in an endemic island country with broad implications, particularly across Pacific Island Countries. FUNDING This work was supported by the Coalition Against Typhoid through the Bill and Melinda Gates Foundation [grant number OPP1017518], the Victorian Government, the National Health and Medical Research Council Australia, the Australian Research Council, and the Fiji Ministry of Health and Medical Services.
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Affiliation(s)
- Mark R. Davies
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Victoria, Australia
| | - Sebastian Duchene
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Victoria, Australia
| | - Mary Valcanis
- Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Australia
| | - Aaron P. Jenkins
- Centre for Ecosystem Management, Edith Cowan University, Western Australia
- School of Public Health, University of Sydney, Sydney, NSW, Australia
| | - Adam Jenney
- New Vaccines Group, Murdoch Children's Research Institute, Victoria, Australia
- College of Medicine, Nursing and Health Sciences, Fiji National University, Suva, Fiji
| | - Varanisese Rosa
- Fiji Centre for Disease Control, Fiji Ministry of Health, Suva, Fiji
| | - Andrew J. Hayes
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Victoria, Australia
| | - Aneley Getahun Strobel
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Victoria, Australia
| | - Liam McIntyre
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Victoria, Australia
| | - Jake A. Lacey
- Department of Infectious Diseases, The University of Melbourne at the Peter Doherty Institute of Infection and Immunity, Victoria, Australia
| | - Elizabeth J. Klemm
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, United Kingdom
| | - Vanessa K. Wong
- Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Aalisha Sahukhan
- Fiji Centre for Disease Control, Fiji Ministry of Health, Suva, Fiji
| | - Helen Thomson
- New Vaccines Group, Murdoch Children's Research Institute, Victoria, Australia
| | - Andrew Page
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, United Kingdom
- Quadram Institute Bioscience, Norwich Research Park, Norfolk, United Kingdom
| | - Dianna Hocking
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Victoria, Australia
| | - Nancy Wang
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Victoria, Australia
| | | | - Eric Rafai
- Fiji Ministry of Health and Medical Services, Suva, Fiji
| | - Gordon Dougan
- Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Benjamin P. Howden
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Victoria, Australia
- Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Australia
| | - John A. Crump
- Centre for International Health, Otago Medical School, University of Otago, Dunedin, New Zealand
| | - Kim Mulholland
- New Vaccines Group, Murdoch Children's Research Institute, Victoria, Australia
- Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Richard A. Strugnell
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Victoria, Australia
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