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Gruhn S, Witte J, Greiner W, Damm O, Dietzsch M, Kramer R, Knuf M. Epidemiology and economic burden of meningococcal disease in Germany: A systematic review. Vaccine 2022; 40:1932-1947. [DOI: 10.1016/j.vaccine.2022.02.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 12/03/2021] [Accepted: 02/09/2022] [Indexed: 11/26/2022]
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Christodoulides M, Humbert MV, Heckels JE. The potential utility of liposomes for Neisseria vaccines. Expert Rev Vaccines 2021; 20:1235-1256. [PMID: 34524062 DOI: 10.1080/14760584.2021.1981865] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
INTRODUCTION Species of the genus Neisseria are important global pathogens. Neisseria gonorrhoeae (gonococcus) causes the sexually transmitted disease gonorrhea and Neisseria meningitidis (meningococcus) causes meningitis and sepsis. Liposomes are self-assembled spheres of phospholipid bilayers enclosing a central aqueous space, and they have attracted much interest and use as a delivery vehicle for Neisseria vaccine antigens. AREAS COVERED A brief background on Neisseria infections and the success of licensed meningococcal vaccines are provided. The absence of a gonococcal vaccine is highlighted. The use of liposomes for delivering Neisseria antigens and adjuvants, for the purposes of generating specific immune responses, is reviewed. The use of other lipid-based systems for antigen and adjuvant delivery is examined briefly. EXPERT OPINION With renewed interest in developing a gonococcal vaccine, liposomes remain an attractive option for delivering antigens. The discipline of nanotechnology provides additional nanoparticle-based options for gonococcal vaccine development. Future work would be needed to tailor the composition of liposomes and other nanoparticles to the specific vaccine antigen(s), in order to generate optimal anti-gonococcal immune responses. The potential use of liposomes and other nanoparticles to deliver anti-gonococcal compounds to treat infections also should be explored further.
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Affiliation(s)
- Myron Christodoulides
- Neisseria Research Group, Molecular Microbiology, School of Clinical and Experimental Sciences, University of Southampton Faculty of Medicine, Southampton, UK
| | - Maria Victoria Humbert
- Neisseria Research Group, Molecular Microbiology, School of Clinical and Experimental Sciences, University of Southampton Faculty of Medicine, Southampton, UK
| | - John E Heckels
- Neisseria Research Group, Molecular Microbiology, School of Clinical and Experimental Sciences, University of Southampton Faculty of Medicine, Southampton, UK
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Krone M, Gray S, Abad R, Skoczyńska A, Stefanelli P, van der Ende A, Tzanakaki G, Mölling P, João Simões M, Křížová P, Emonet S, Caugant DA, Toropainen M, Vazquez J, Waśko I, Knol MJ, Jacobsson S, Rodrigues Bettencourt C, Musilek M, Born R, Vogel U, Borrow R. Increase of invasive meningococcal serogroup W disease in Europe, 2013 to 2017. ACTA ACUST UNITED AC 2020; 24. [PMID: 30968827 PMCID: PMC6462787 DOI: 10.2807/1560-7917.es.2019.24.14.1800245] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BackgroundThe total incidence of invasive meningococcal disease (IMD) in Europe has been declining in recent years; however, a rising incidence due to serogroup W (MenW), predominantly sequence type 11 (ST-11), clonal complex 11 (cc11), was reported in some European countries.AimThe aim of this study was to compile the most recent laboratory surveillance data on MenW IMD from several European countries to assess recent trends in Europe.MethodsIn this observational, retrospective study, IMD surveillance data collected from 2013-17 by national reference laboratories and surveillance units from 13 European countries were analysed using descriptive statistics.ResultsThe overall incidence of IMD has been stable during the study period. Incidence of MenW IMD per 100,000 population (2013: 0.03; 2014: 0.05; 2015: 0.08; 2016: 0.11; 2017: 0.11) and the proportion of this serogroup among all invasive cases (2013: 5% (116/2,216); 2014: 9% (161/1,761); 2015: 13% (271/2,074); 2016: 17% (388/2,222); 2017: 19% (393/2,112)) continuously increased. The most affected countries were England, the Netherlands, Switzerland and Sweden. MenW was more frequent in older age groups (≥ 45 years), while the proportion in children (< 15 years) was lower than in other age groups. Of the culture-confirmed MenW IMD cases, 80% (615/767) were caused by hypervirulent cc11.ConclusionDuring the years 2013-17, an increase in MenW IMD, mainly caused by MenW cc11, was observed in the majority of European countries. Given the unpredictable nature of meningococcal spread and the epidemiological potential of cc11, European countries may consider preventive strategies adapted to their contexts.
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Affiliation(s)
- Manuel Krone
- Institute for Hygiene and Microbiology, University of Würzburg, Würzburg, Germany
| | - Steve Gray
- Meningococcal Reference Unit, Public Health England, Manchester, United Kingdom
| | - Raquel Abad
- Spanish Reference Laboratory for Meningococci, National Centre for Microbiology, Instituto de Salud Carlos III, Madrid, Spain
| | - Anna Skoczyńska
- National Reference Centre for Bacterial Meningitis, National Medicines Institute, Warsaw, Poland
| | - Paola Stefanelli
- Dept. of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy
| | - Arie van der Ende
- The Netherlands Reference Laboratory for Bacterial Meningitis, Department of Medical Microbiology, Academic Medical Center, Amsterdam, Netherlands
| | - Georgina Tzanakaki
- National Meningitis Reference Laboratory, National School of Public Health, Athens, Greece
| | - Paula Mölling
- National Reference Laboratory for Neisseria meningitidis, Department of Laboratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Maria João Simões
- Department of Infectious Diseases, National Institute of Health Dr. Ricardo Jorge, Lisboa, Portugal
| | - Pavla Křížová
- National Reference Laboratory for Meningococcal Infections, National Institute of Public Health, Prague, Czech Republic
| | - Stéphane Emonet
- Division of Infectious Diseases, Geneva University Hospitals, Geneva, Switzerland
| | - Dominique A Caugant
- Division for Infection Control and Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Maija Toropainen
- Department of Health Security, National Institute for Health and Welfare (THL), Helsinki, Finland
| | - Julio Vazquez
- Spanish Reference Laboratory for Meningococci, National Centre for Microbiology, Instituto de Salud Carlos III, Madrid, Spain
| | - Izabela Waśko
- National Reference Centre for Bacterial Meningitis, National Medicines Institute, Warsaw, Poland
| | - Mirjam J Knol
- Department of Epidemiology and Surveillance, National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Susanne Jacobsson
- National Reference Laboratory for Neisseria meningitidis, Department of Laboratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | | | - Martin Musilek
- National Reference Laboratory for Meningococcal Infections, National Institute of Public Health, Prague, Czech Republic
| | - Rita Born
- Division of Communicable Diseases, Federal Office of Public Health (FOPH), Bern, Switzerland
| | - Ulrich Vogel
- Institute for Hygiene and Microbiology, University of Würzburg, Würzburg, Germany
| | - Ray Borrow
- Meningococcal Reference Unit, Public Health England, Manchester, United Kingdom
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Mowlaboccus S, Perkins TT, Smith H, Sloots T, Tozer S, Prempeh LJ, Tay CY, Peters F, Speers D, Keil AD, Kahler CM. Temporal Changes in BEXSERO® Antigen Sequence Type Associated with Genetic Lineages of Neisseria meningitidis over a 15-Year Period in Western Australia. PLoS One 2016; 11:e0158315. [PMID: 27355628 PMCID: PMC4927168 DOI: 10.1371/journal.pone.0158315] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2016] [Accepted: 06/14/2016] [Indexed: 12/12/2022] Open
Abstract
Neisseria meningitidis is the causative agent of invasive meningococcal disease (IMD). The BEXSERO® vaccine which is used to prevent serogroup B disease is composed of four sub-capsular protein antigens supplemented with an outer membrane vesicle. Since the sub-capsular protein antigens are variably expressed and antigenically variable amongst meningococcal isolates, vaccine coverage can be estimated by the meningococcal antigen typing system (MATS) which measures the propensity of the strain to be killed by vaccinated sera. Whole genome sequencing (WGS) which identifies the alleles of the antigens that may be recognised by the antibody response could represent, in future, an alternative estimate of coverage. In this study, WGS of 278 meningococcal isolates responsible for 62% of IMD in Western Australia from 2000–2014 were analysed for association of genetic lineage (sequence type [ST], clonal complex [cc]) with BEXSERO® antigen sequence type (BAST) and MATS to predict the annual vaccine coverage. A hyper-endemic period of IMD between 2000–05 was caused by cc41/44 with the major sequence type of ST-146 which was not predicted by MATS or BAST to be covered by the vaccine. An increase in serogroup diversity was observed between 2010–14 with the emergence of cc11 serogroup W in the adolescent population and cc23 serogroup Y in the elderly. BASTs were statistically associated with clonal complex although individual antigens underwent antigenic drift from the major type. BAST and MATS predicted an annual range of 44–91% vaccine coverage. Periods of low vaccine coverage in years post-2005 were not a result of the resurgence of cc41/44:ST-146 but were characterised by increased diversity of clonal complexes expressing BASTs which were not predicted by MATS to be covered by the vaccine. The driving force behind the diversity of the clonal complex and BAST during these periods of low vaccine coverage is unknown, but could be due to immune selection and inter-strain competition with carriage of non-disease causing meningococci.
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Affiliation(s)
- Shakeel Mowlaboccus
- Marshall Centre for Infectious Disease Research and Training, School of Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
| | - Timothy T. Perkins
- Marshall Centre for Infectious Disease Research and Training, School of Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
| | - Helen Smith
- Public Health Microbiology, Forensic and Scientific Services, Health Support Queensland Department of Health, Brisbane, Australia
| | - Theo Sloots
- Sir Albert Sakzewski Virus Research Centre, Queensland Paediatric Infectious Diseases Laboratory, Royal Children’s Hospital, Brisbane, Australia
| | - Sarah Tozer
- Sir Albert Sakzewski Virus Research Centre, Queensland Paediatric Infectious Diseases Laboratory, Royal Children’s Hospital, Brisbane, Australia
| | - Lydia-Jessica Prempeh
- Marshall Centre for Infectious Disease Research and Training, School of Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
| | - Chin Yen Tay
- Marshall Centre for Infectious Disease Research and Training, School of Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
| | - Fanny Peters
- Marshall Centre for Infectious Disease Research and Training, School of Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
| | - David Speers
- Department of Microbiology, QEII Medical Centre, PathWest Laboratory Medicine WA, Perth, Australia
| | - Anthony D. Keil
- Department of Microbiology, Princess Margaret Hospital for Children, PathWest Laboratory Medicine WA, Perth, Australia
| | - Charlene M. Kahler
- Marshall Centre for Infectious Disease Research and Training, School of Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
- Telethon Kids Institute, Perth, WA, Australia
- * E-mail:
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Whelan J, Bambini S, Biolchi A, Brunelli B, Robert–Du Ry van Beest Holle M. Outbreaks of meningococcal B infection and the 4CMenB vaccine: historical and future perspectives. Expert Rev Vaccines 2015; 14:713-36. [DOI: 10.1586/14760584.2015.1004317] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Wiringa AE, Shutt KA, Marsh JW, Cohn AC, Messonnier NE, Zansky SM, Petit S, Farley MM, Gershman K, Lynfield R, Reingold A, Schaffner W, Thompson J, Brown ST, Lee BY, Harrison LH. Geotemporal analysis of Neisseria meningitidis clones in the United States: 2000-2005. PLoS One 2013; 8:e82048. [PMID: 24349182 PMCID: PMC3861328 DOI: 10.1371/journal.pone.0082048] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Accepted: 10/29/2013] [Indexed: 11/30/2022] Open
Abstract
Background The detection of meningococcal outbreaks relies on serogrouping and epidemiologic definitions. Advances in molecular epidemiology have improved the ability to distinguish unique Neisseria meningitidis strains, enabling the classification of isolates into clones. Around 98% of meningococcal cases in the United States are believed to be sporadic. Methods Meningococcal isolates from 9 Active Bacterial Core surveillance sites throughout the United States from 2000 through 2005 were classified according to serogroup, multilocus sequence typing, and outer membrane protein (porA, porB, and fetA) genotyping. Clones were defined as isolates that were indistinguishable according to this characterization. Case data were aggregated to the census tract level and all non-singleton clones were assessed for non-random spatial and temporal clustering using retrospective space-time analyses with a discrete Poisson probability model. Results Among 1,062 geocoded cases with available isolates, 438 unique clones were identified, 78 of which had ≥2 isolates. 702 cases were attributable to non-singleton clones, accounting for 66.0% of all geocoded cases. 32 statistically significant clusters comprised of 107 cases (10.1% of all geocoded cases) were identified. Clusters had the following attributes: included 2 to 11 cases; 1 day to 33 months duration; radius of 0 to 61.7 km; and attack rate of 0.7 to 57.8 cases per 100,000 population. Serogroups represented among the clusters were: B (n = 12 clusters, 45 cases), C (n = 11 clusters, 27 cases), and Y (n = 9 clusters, 35 cases); 20 clusters (62.5%) were caused by serogroups represented in meningococcal vaccines that are commercially available in the United States. Conclusions Around 10% of meningococcal disease cases in the U.S. could be assigned to a geotemporal cluster. Molecular characterization of isolates, combined with geotemporal analysis, is a useful tool for understanding the spread of virulent meningococcal clones and patterns of transmission in populations.
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Affiliation(s)
- Ann E. Wiringa
- Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania, United States of America
| | - Kathleen A. Shutt
- Infectious Diseases Epidemiology Research Unit, University of Pittsburgh Graduate School of Public Health and School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Jane W. Marsh
- Infectious Diseases Epidemiology Research Unit, University of Pittsburgh Graduate School of Public Health and School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Amanda C. Cohn
- Meningitis and Vaccine Preventable Diseases Branch, Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Nancy E. Messonnier
- Meningitis and Vaccine Preventable Diseases Branch, Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Shelley M. Zansky
- New York State Department of Health, Albany, New York, United States of America
| | - Susan Petit
- Connecticut Department of Public Health, Hartford, Connecticut, United States of America
| | - Monica M. Farley
- Emory University and VA Medical Center, Atlanta, Georgia, United States of America
| | - Ken Gershman
- Colorado Department of Public Health and Environment, Denver, Colorado, United States of America
| | - Ruth Lynfield
- Minnesota Department of Health, St. Paul, Minnesota, United States of America
| | - Arthur Reingold
- University of California, Berkeley, Berkeley, California, United States of America
| | - William Schaffner
- Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Jamie Thompson
- Oregon Public Health Division, Portland, Oregon, United States of America
| | - Shawn T. Brown
- Pittsburgh Supercomputing Center, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Bruce Y. Lee
- Public Health Computational and Operations Research (PHICOR), University of Pittsburgh School of Medicine and Graduate School of Public Health, Pittsburgh, Pennsylvania, United States of America
| | - Lee H. Harrison
- Infectious Diseases Epidemiology Research Unit, University of Pittsburgh Graduate School of Public Health and School of Medicine, Pittsburgh, Pennsylvania, United States of America
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
- * E-mail:
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Esposito S, Zampiero A, Terranova L, Montinaro V, Scala A, Ansuini V, Principi N. Genetic characteristics of Neisseria meningitidis serogroup B strains carried by adolescents living in Milan, Italy: implications for vaccine efficacy. Hum Vaccin Immunother 2013; 9:2296-303. [PMID: 23880917 DOI: 10.4161/hv.25800] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Before a protein vaccine is introduced into a country, it is essential to evaluate its potential impact and estimate its benefits and costs. The aim of this study was to determine the genetic characteristics of Neisseria meningitidis B (NmB) in the pharyngeal secretions of 1375 healthy adolescents aged 13-19 y living in Milan, Italy, in September 2012, and the possible protection offered by the two currently available NmB protein vaccines. Ninety-one subjects were Nm carriers (6.6%), 29 (31.9%) of whom carried the NmB capsular gene. The 29 identified strains belonged to eight clonal complexes (CCs), the majority of which were in the ST-41/44/Lin.3 CC (n = 11; 37.9%). All of the identified strains harboured ƒHbp alleles representing a total of 15 sub-variants: the gene for NHBA protein was found in all but three of the studied strains (10.3%) with 13 identified sub-variants. There were 15 porA sub-types, seven of which were identified in just one CC. The findings of this study seem to suggest that both of the protein vaccines proposed for the prevention of invasive disease due to NmB (the 4-protein and the 2-protein products) have a composition that can evoke a theoretically effective antibody response against the meningococcal strains currently carried by adolescents living in Northern Italy. The genetic characteristics of NmB strains can be easily evaluated by means of molecular methods, the results of which can provide an albeit approximate estimate of the degree of protection theoretically provided by the available vaccines, and the possible future need to change their composition.
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Affiliation(s)
- Susanna Esposito
- Pediatric Clinic 1; Department of Pathophysiology and Transplantation; Università degli Studi di Milano; Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico; Milan, Italy
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Genetic distribution of noncapsular meningococcal group B vaccine antigens in Neisseria lactamica. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2013; 20:1360-9. [PMID: 23803905 DOI: 10.1128/cvi.00090-13] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The poor immunogenicity of the meningococcal serogroup B (MenB) capsule has led to the development of vaccines targeting subcapsular antigens, in particular the immunodominant and diverse outer membrane porin, PorA. These vaccines are largely strain specific; however, they offer limited protection against the diverse MenB-associated diseases observed in many industrialized nations. To broaden the scope of its protection, the multicomponent vaccine (4CMenB) incorporates a PorA-containing outer membrane vesicle (OMV) alongside relatively conserved recombinant protein components, including factor H-binding protein (fHbp), Neisseria adhesin A (NadA), and neisserial heparin-binding antigen (NHBA). The expression of PorA is unique to meningococci (Neisseria meningitidis); however, many subcapsular antigens are shared with nonpathogenic members of the genus Neisseria that also inhabit the nasopharynx. These organisms may elicit cross-protective immunity against meningococci and/or occupy a niche that might otherwise accommodate pathogens. The potential for 4CMenB responses to impact such species (and vice versa) was investigated by determining the genetic distribution of the primary 4CMenB antigens among diverse members of the common childhood commensal, Neisseria lactamica. All the isolates possessed nhba but were devoid of fhbp and nadA. The nhba alleles were mainly distinct from but closely related to those observed among a representative panel of invasive MenB isolates from the same broad geographic region. We made similar findings for the immunogenic typing antigen, FetA, which constitutes a major part of the 4CMenB OMV. Thus, 4CMenB vaccine responses may impact or be impacted by nasopharyngeal carriage of commensal neisseriae. This highlights an area for further research and surveillance should the vaccine be routinely implemented.
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Bambini S, Piet J, Muzzi A, Keijzers W, Comandi S, De Tora L, Pizza M, Rappuoli R, van de Beek D, van der Ende A, Comanducci M. An analysis of the sequence variability of meningococcal fHbp, NadA and NHBA over a 50-year period in the Netherlands. PLoS One 2013; 8:e65043. [PMID: 23717687 PMCID: PMC3663754 DOI: 10.1371/journal.pone.0065043] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Accepted: 04/26/2013] [Indexed: 02/04/2023] Open
Abstract
Studies of meningococcal evolution and genetic population structure, including the long-term stability of non-random associations between variants of surface proteins, are essential for vaccine development. We analyzed the sequence variability of factor H-binding protein (fHbp), Neisserial Heparin-Binding Antigen (NHBA) and Neisseria adhesin A (NadA), three major antigens in the multicomponent meningococcal serogroup B vaccine 4CMenB. A panel of invasive isolates collected in the Netherlands over a period of 50 years was used. To our knowledge, this strain collection covers the longest time period of any collection available worldwide. Long-term persistence of several antigen sub/variants and of non-overlapping antigen sub/variant combinations was observed. Our data suggest that certain antigen sub/variants including those used in 4CMenB are conserved over time and promoted by selection.
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Affiliation(s)
| | - Jurgen Piet
- Academic Medical Center, Department of Medical Microbiology, Amsterdam, The Netherlands
| | | | - Wendy Keijzers
- Academic Medical Center, Department of Medical Microbiology, Amsterdam, The Netherlands
- The Netherlands Reference Laboratory for Bacterial Meningitis, Amsterdam, The Netherlands
| | | | | | | | | | | | - Arie van der Ende
- Academic Medical Center, Department of Medical Microbiology, Amsterdam, The Netherlands
- The Netherlands Reference Laboratory for Bacterial Meningitis, Amsterdam, The Netherlands
- * E-mail: (AVDE); (MC)
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Jolley KA, Maiden MC. Automated extraction of typing information for bacterial pathogens from whole genome sequence data: Neisseria meningitidis as an exemplar. ACTA ACUST UNITED AC 2013; 18:20379. [PMID: 23369391 DOI: 10.2807/ese.18.04.20379-en] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Whole genome sequence (WGS) data are increasingly used to characterise bacterial pathogens. These data provide detailed information on the genotypes and likely phenotypes of aetiological agents, enabling the relationships of samples from potential disease outbreaks to be established precisely. However, the generation of increasing quantities of sequence data does not, in itself, resolve the problems that many microbiological typing methods have addressed over the last 100 years or so; indeed, providing large volumes of unstructured data can confuse rather than resolve these issues. Here we review the nascent field of storage of WGS data for clinical application and show how curated sequence-based typing schemes on websites have generated an infrastructure that can exploit WGS for bacterial typing efficiently. We review the tools that have been implemented within the PubMLST website to extract clinically useful, strain-characterisation information that can be provided to physicians and public health professionals in a timely, concise and understandable way. These data can be used to inform medical decisions such as how to treat a patient, whether to instigate public health action, and what action might be appropriate. The information is compatible both with previous sequence-based typing data and also with data obtained in the absence of WGS, providing a flexible infrastructure for WGS-based clinical microbiology.
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Affiliation(s)
- K A Jolley
- Department of Zoology, University of Oxford, Oxford, United Kingdom
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Watkins ER, Maiden MCJ. Persistence of hyperinvasive meningococcal strain types during global spread as recorded in the PubMLST database. PLoS One 2012; 7:e45349. [PMID: 23028953 PMCID: PMC3460945 DOI: 10.1371/journal.pone.0045349] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Accepted: 08/15/2012] [Indexed: 01/10/2023] Open
Abstract
Neisseria meningitidis is a major cause of septicaemia and meningitis worldwide. Most disease in Europe, the Americas and Australasia is caused by meningococci expressing serogroup B capsules, but no vaccine against this polysaccharide exists. Potential candidates for 'serogroup B substitute' vaccines are outer membrane protein antigens including the typing antigens PorA and FetA. The web-accessible PubMLST database (www.pubmlst.org) was used to investigate the temporal and geographical patterns of associations among PorA and FetA protein variants and lineages defined by combinations of housekeeping genes, known as clonal complexes. The sample contained 3460 isolates with genotypic information from 57 countries over a 74 year period. Although shifting associations among antigen variants and clonal complexes were evident, a subset of strain types associated with several serogroups persisted for decades and proliferated globally. Genetic stability among outer membrane proteins of serogroup A meningococci has been described previously, but here long-lived genetic associations were also observed among meningococci belonging to serogroups B and C. The patterns of variation were consistent with behaviour predicted by models that invoke inter-strain competition mediated by immune selection. There was also substantial geographic and temporal heterogeneity in antigenic repertoires, providing both opportunities and challenges for the design of broad coverage protein-based meningococcal vaccines.
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Hubert K, Pawlik MC, Claus H, Jarva H, Meri S, Vogel U. Opc expression, LPS immunotype switch and pilin conversion contribute to serum resistance of unencapsulated meningococci. PLoS One 2012; 7:e45132. [PMID: 23028802 PMCID: PMC3447861 DOI: 10.1371/journal.pone.0045132] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 08/13/2012] [Indexed: 01/15/2023] Open
Abstract
Neisseria meningitidis employs polysaccharides and outer membrane proteins to cope with human serum complement attack. To screen for factors influencing serum resistance, an assay was developed based on a colorimetric serum bactericidal assay. The screening used a genetically modified sequence type (ST)-41/44 clonal complex (cc) strain lacking LPS sialylation, polysaccharide capsule, the factor H binding protein (fHbp) and MutS, a protein of the DNA repair mechanism. After killing of >99.9% of the bacterial cells by serum treatment, the colorimetric assay was used to screen 1000 colonies, of which 35 showed enhanced serum resistance. Three mutant classes were identified. In the first class of mutants, enhanced expression of Opc was identified. Opc expression was associated with vitronectin binding and reduced membrane attack complex deposition confirming recent observations. Lipopolysaccharide (LPS) immunotype switch from immunotype L3 to L8/L1 by lgtA and lgtC phase variation represented the second class. Isogenic mutant analysis demonstrated that in ST-41/44 cc strains the L8/L1 immunotype was more serum resistant than the L3 immunotype. Consecutive analysis revealed that the immunotypes L8 and L1 were frequently observed in ST-41/44 cc isolates from both carriage and disease. Immunotype switch to L8/L1 is therefore suggested to contribute to the adaptive capacity of this meningococcal lineage. The third mutant class displayed a pilE allelic exchange associated with enhanced autoaggregation. The mutation of the C terminal hypervariable region D of PilE included a residue previously associated with increased pilus bundle formation. We suggest that autoaggregation reduced the surface area accessible to serum complement and protected from killing. The study highlights the ability of meningococci to adapt to environmental stress by phase variation and intrachromosomal recombination affecting subcapsular antigens.
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Affiliation(s)
- Kerstin Hubert
- University of Würzburg, Institute for Hygiene and Microbiology, Würzburg, Germany
| | | | - Heike Claus
- University of Würzburg, Institute for Hygiene and Microbiology, Würzburg, Germany
| | | | | | - Ulrich Vogel
- University of Würzburg, Institute for Hygiene and Microbiology, Würzburg, Germany
- * E-mail:
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Vogel U, Szczepanowski R, Claus H, Jünemann S, Prior K, Harmsen D. Ion torrent personal genome machine sequencing for genomic typing of Neisseria meningitidis for rapid determination of multiple layers of typing information. J Clin Microbiol 2012; 50:1889-94. [PMID: 22461678 PMCID: PMC3372157 DOI: 10.1128/jcm.00038-12] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Accepted: 03/20/2012] [Indexed: 01/29/2023] Open
Abstract
Neisseria meningitidis causes invasive meningococcal disease in infants, toddlers, and adolescents worldwide. DNA sequence-based typing, including multilocus sequence typing, analysis of genetic determinants of antibiotic resistance, and sequence typing of vaccine antigens, has become the standard for molecular epidemiology of the organism. However, PCR of multiple targets and consecutive Sanger sequencing provide logistic constraints to reference laboratories. Taking advantage of the recent development of benchtop next-generation sequencers (NGSs) and of BIGSdb, a database accommodating and analyzing genome sequence data, we therefore explored the feasibility and accuracy of Ion Torrent Personal Genome Machine (PGM) sequencing for genomic typing of meningococci. Three strains from a previous meningococcus serogroup B community outbreak were selected to compare conventional typing results with data generated by semiconductor chip-based sequencing. In addition, sequencing of the meningococcal type strain MC58 provided information about the general performance of the technology. The PGM technology generated sequence information for all target genes addressed. The results were 100% concordant with conventional typing results, with no further editing being necessary. In addition, the amount of typing information, i.e., nucleotides and target genes analyzed, could be substantially increased by the combined use of genome sequencing and BIGSdb compared to conventional methods. In the near future, affordable and fast benchtop NGS machines like the PGM might enable reference laboratories to switch to genomic typing on a routine basis. This will reduce workloads and rapidly provide information for laboratory surveillance, outbreak investigation, assessment of vaccine preventability, and antibiotic resistance gene monitoring.
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Affiliation(s)
- Ulrich Vogel
- Institute for Hygiene and Microbiology, University of Würzburg, Würzburg, Germany.
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Shibl A, Tufenkeji H, Khalil M, Memish Z. Consensus recommendation for meningococcal disease prevention in children and adolescents in the Middle East region. J Epidemiol Glob Health 2012; 2:23-30. [PMID: 23856395 PMCID: PMC7320358 DOI: 10.1016/j.jegh.2012.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Revised: 01/31/2012] [Accepted: 02/10/2012] [Indexed: 12/01/2022] Open
Abstract
Facing the availability of the new generation of quadrivalent meningococcal conjugate vaccines (Menveo®, Menactra® and others pending for license) and their recent implementation in Saudi Arabia, experts from 11 countries of the Middle East region met at a “Meningococcal Leadership Forum” (MLF), which took place in May 2010 in Dubai. The participants of the conference discussed the importance of introducing the concept of conjugate vaccines – especially for children and adolescents – and elaborated a consensus recommendation to support healthcare professionals and decision makers with their expertise. In experts’ opinion, conjugate vaccines are the best choice for the prevention of meningococcal disease caused by serogroups A, C, W-135 and Y. As quadrivalent meningococcal conjugate vaccines are registered and available in the Middle East region, they should replace plain polysaccharide vaccines and be integrated in pediatric and adolescent vaccination schedules, including infant vaccination concomitantly with basic EPI vaccines when licensed.
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Affiliation(s)
- Atef Shibl
- King Saud University, Riyadh, Saudi Arabia.
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16
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Abstract
Neisseria meningitidis causes life-threatening disease in infants, toddlers, and adolescents. Besides representative case notification, public health management of the disease requires bacterial typing information. European reference laboratories and state epidemiologists in collaboration with European institutions have driven forward the harmonization of typing by rigorously adopting DNA sequence typing and using common reference databases. External quality assessment has been provided by supranational networks, i.e. EU-IBIS and IBD-Labnet. The recent development of novel protein-based vaccines targeting serogroup B strains highlights the necessity to complement standard typing schemes by specific vaccine antigen typing including antigen expression analysis. Although not yet feasible for routine application on hundreds of strains, novel database structures have been developed to accommodate deep sequencing data.
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Affiliation(s)
- Ulrich Vogel
- Institute for Hygiene and Microbiology, University of Würzburg, Josef-Schneider-Str. 2, Building E2, 97080 Würzburg, Germany.
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Meyer S, Elias J, Höhle M. A space-time conditional intensity model for invasive meningococcal disease occurrence. Biometrics 2011; 68:607-16. [PMID: 21981412 DOI: 10.1111/j.1541-0420.2011.01684.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel point process model continuous in space-time is proposed for quantifying the transmission dynamics of the two most common meningococcal antigenic sequence types observed in Germany 2002-2008. Modeling is based on the conditional intensity function (CIF), which is described by a superposition of additive and multiplicative components. As an epidemiological interesting finding, spread behavior was shown to depend on type in addition to age: basic reproduction numbers were 0.25 (95% CI 0.19-0.34) and 0.11 (95% CI 0.07-0.17) for types B:P1.7-2,4:F1-5 and C:P1.5,2:F3-3, respectively. Altogether, the proposed methodology represents a comprehensive and universal regression framework for the modeling, simulation, and inference of self-exciting spatiotemporal point processes based on the CIF. Usability of the modeling in biometric practice is promoted by an implementation in the R package surveillance.
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Affiliation(s)
- Sebastian Meyer
- Department of Psychiatry and Psychotherapy, Ludwig-Maximilians-Universität, 80336 München, Germany.
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Seib KL, Pigozzi E, Muzzi A, Gawthorne JA, Delany I, Jennings MP, Rappuoli R. A novel epigenetic regulator associated with the hypervirulent
Neisseria meningitidis
clonal complex 41/44. FASEB J 2011; 25:3622-33. [DOI: 10.1096/fj.11-183590] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | | | | | - Jayde A. Gawthorne
- Institute for GlycomicsGriffith University Gold Coast Queensland Australia
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Stephens DS. Outer-membrane-vesicle vaccines: old but not forgotten. THE LANCET. INFECTIOUS DISEASES 2011; 11:421-2. [DOI: 10.1016/s1473-3099(11)70096-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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