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Full information on isolate 20 (id:34)

Projects

This isolate is a member of the following projects:

107 global collection
This dataset was originally used to validate MLST and was chosen to represent global diversity of N. meningitidis in the latter half of the Twentieth Century. It has been used in many publications since and the isolates are available as the EMGM MLST reference collection.
GMGL
Global Meningitis Genome Library: curated isolate data sets of N. meningtidis causing meningitis and/or septicaemia

Provenance/primary metadata

id
34
isolate
20
strain designation
A: P1.5-2,10: F1-7: ST-1 (cc1)
aliases
B275; NIBSC_2767; Z1275
country
Niger
continent
Africa
year
1963
disease
invasive (unspecified/other)
source
CSF
species
Neisseria meningitidis
serogroup
A
genogroup
A
genogroup notes
A backbone: All essential capsule genes intact and present. Prediction code: https://github.com/ntopaz/characterize_neisseria_capsule.
capsule group
A
serotype
4,21
sero subtype
P1.10
comments
Pili IIb

Tracking

biosample accession
ERS006943 www.ebi.ac.uk
sender
Mark Achtman, Max-Planck Institut fur Infektionsbiologie, Schumannstr. 21/22, Berlin, Germany
curator
Auto Tagger
update history
128 updates show details
date entered
2001-02-07
datestamp
2022-04-16

Secondary metadata

Deduced vaccine reactivity

Bexsero reactivity
cross-reactive 
notes
Bexsero notes
fHbp_peptide: 4 is cross-reactive to vaccine variant - data derived from MATS assays (PMID:23414709, PMID:23588089, PMID:26686998, PMID:26950303, PMID:27083425, PMID:27355628, PMID:28366725, PMID:29152576, PMID:30135218)
Trumenba reactivity
cross-reactive 
notes
Trumenba notes
fHbp_peptide: 4 is cross-reactive to vaccine variant - data derived from MEASURE assays (PMID:29535195), and SBA assays (PMID:27846061, PMID:29236639)

Bexsero® (4CMenB) is a multicomponent vaccine.

  • Protein-based meningococcal vaccines contain surface proteins as vaccine antigens, these proteins demonstrate nucleotide and amino acid sequence diversity.
  • Peptide sequence diversity can be analysed using the Bexsero Antigen Sequence Typing (BAST) scheme1.
  • Bexsero® contains: fHbp peptide 1; NHBA peptide 2; NadA peptide 8; PorA VR2 4.

The Deduced Vaccine Antigen Reactivity (MenDeVAR) Index was developed to combine multiple, complex data that inform the reactivity of each vaccine against specific antigenic variants.

The MenDeVAR Index:

  • isolate contains ≥1 exact sequence match to antigenic variants found in the vaccine.
  • isolate contains ≥1 antigenic variant deemed cross-reactive to vaccine variants through experimental studies.
  • all the isolate's antigenic variants have been deemed not cross-reactive to vaccine variants through experimental studies.
  • isolate contains antigens for which there is insufficient data from or are yet to be tested in experimental studies.

It is important to understand the caveats to interpreting the MenDeVAR Index:

Source of data - These data combine multiple sources of information including: peptide sequence identity through whole genome sequencing; experimental assays developed as indirect measures of the breadth of vaccine protection against diverse meningococci; and assays developed to assess immunogenicity. The Meningococcal Antigen Typing System (MATS)2 assay was used for Bexsero®.

Cross-reactivity definition - An antigenic variant was considered cross-reactive if it had been tested in ≥5 isolates/subjects and was above the accepted threshold in ≥75% of those isolates. This was established through combined analysis of published experimental studies (PMID provided for each variant), not from genomic data. These assays were based on serogroup B disease isolates.

Protein expression - We have not inferred from genomic data, therefore there may be isolates that possess genes but do no express the protein in vivo.

Age of vaccinees - For MATS assay development2, Bexsero® vaccine recipients were infants who had received 3 doses of vaccine and then a booster at 12 months. The pooled sera used for the MATS assay were taken from the toddlers at 13 months of age.

  1. Brehony C, Rodrigues CMC, Borrow R, et al. Distribution of Bexsero® Antigen Sequence Types (BASTs) in invasive meningococcal disease isolates: Implications for immunisation. Vaccine 2016 34(39):4690-7
  2. Donnelly J, Medini D, Boccadifuoco G, et al. Qualitative and quantitative assessment of meningococcal antigens to evaluate the potential strain coverage of protein-based vaccines. Proc Natl Acad Sci USA 2010;107(45):19490-19495

MenDeVAR is described in Rodrigues et al. 2020, J Clin Microbiol 59(1):e02161-20. Please contact us if you have queries.

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Trumenba® (rLP2086) is a bivalent fHbp-containing vaccine.

  • Protein-based meningococcal vaccines contain surface proteins as vaccine antigens, these proteins demonstrate nucleotide and amino acid sequence diversity.
  • Peptide sequence diversity can be analysed using the fhbp peptide locus.
  • Trumenba® vaccine contains fHbp peptides 45 and 551.

The Deduced Vaccine Antigen Reactivity (MenDeVAR) Index was developed to combine multiple, complex data that inform the reactivity of each vaccine against specific antigenic variants.

The MenDeVAR Index:

  • isolate contains ≥1 exact sequence match to antigenic variants found in the vaccine.
  • isolate contains ≥1 antigenic variant deemed cross-reactive to vaccine variants through experimental studies.
  • all the isolate's antigenic variants have been deemed not cross-reactive to vaccine variants through experimental studies.
  • isolate contains antigens for which there is insufficient data from or are yet to be tested in experimental studies.

It is important to understand the caveats to interpreting the MenDeVAR Index:

Source of data - These data combine multiple sources of information including: peptide sequence identity through whole genome sequencing; experimental assays developed as indirect measures of the breadth of vaccine protection against diverse meningococci; and assays developed to assess immunogenicity. The meningococcal antigen surface expression (MEASURE)2 and serum bactericidal activity (SBA) assays were used for Trumenba®.

Cross-reactivity definition - An antigenic variant was considered cross-reactive if it had been tested in ≥5 isolates/subjects and was above the accepted threshold in ≥75% of those isolates. This was established through combined analysis of published experimental studies (PMID provided for each variant), not from genomic data. These assays were based on serogroup B disease isolates.

Age of vaccinees - The age of vaccine recipients in the experimental studies varies widely, ranging from toddlers to adults, and needs to be taken into consideration when interpreting results. Vaccine studies used different schedules and doses of vaccines.

  1. Jiang HQ, Hoiseth SK, Harris SL, et al. Broad vaccine coverage predicted for a bivalent recombinant factor H binding protein based vaccine to prevent serogroup B meningococcal disease. Vaccine 2010;28(37):6086-93
  2. McNeil LK, Donald RGK, Gribenko A, et al. Predicting the Susceptibility of Meningococcal Serogroup B Isolates to Bactericidal Antibodies Elicited by Bivalent rLP2086, a Novel Prophylactic Vaccine. mBio 2018;9(2):e00036-18

MenDeVAR is described in Rodrigues et al. 2020, J Clin Microbiol 59(1):e02161-20. Please contact us if you have queries.

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Publications (10)

  • Bennett JS, Jolley KA, Sparling PF, Saunders NJ, Hart CA, Feavers IM, Maiden MC (2007). Species status of Neisseria gonorrhoeae: evolutionary and epidemiological inferences from multilocus sequence typing. BMC Biol 5:35
  • Bratcher HB, Corton C, Jolley KA, Parkhill J, Maiden MC (2014). A gene-by-gene population genomics platform: de novo assembly, annotation and genealogical analysis of 108 representative Neisseria meningitidis genomes. BMC Genomics 15:1138
  • Didelot X, Urwin R, Maiden MC, Falush D (2009). Genealogical typing of Neisseria meningitidis. Microbiology 155:3176-86
  • Jolley KA, Sun L, Moxon ER, Maiden MC (2004). Dam inactivation in Neisseria meningitidis: prevalence among diverse hyperinvasive lineages. BMC Microbiol 4:34
  • Jolley KA, Wilson DJ, Kriz P, McVean G, Maiden MC (2005). The influence of mutation, recombination, population history, and selection on patterns of genetic diversity in Neisseria meningitidis. Mol Biol Evol 22:562-9
  • Maiden MC, Bygraves JA, Feil E, Morelli G, Russell JE, Urwin R, Zhang Q, Zhou J, Zurth K, Caugant DA, Feavers IM, Achtman M, Spratt BG (1998). Multilocus sequence typing: a portable approach to the identification of clones within populations of pathogenic microorganisms. Proc Natl Acad Sci U S A 95:3140-5
  • Thompson EA, Feavers IM, Maiden MC (2003). Antigenic diversity of meningococcal enterobactin receptor FetA, a vaccine component. Microbiology 149:1849-58
  • Urwin R, Russell JE, Thompson EA, Holmes EC, Feavers IM, Maiden MC (2004). Distribution of surface protein variants among hyperinvasive meningococci: implications for vaccine design. Infect Immun 72:5955-62
  • Wang JF, Caugant DA, Li X, Hu X, Poolman JT, Crowe BA, Achtman M (1992). Clonal and antigenic analysis of serogroup A Neisseria meningitidis with particular reference to epidemiological features of epidemic meningitis in the People's Republic of China. Infect Immun 60:5267-82
  • Watkins ER, Maiden MC (2017). Metabolic shift in the emergence of hyperinvasive pandemic meningococcal lineages. Sci Rep 7:41126

Sequence bin

contigs
213
total length
2,067,373 bp
max length
54,815 bp
mean length
9,706 bp
N50
19,311
L50
35
N90
5,317
L90
110
N95
3,235
L95
135
%GC
51.96
Ns
0
gaps
0
loci tagged
2,188

Show sequence bin

Annotation quality metrics

SchemeScheme lociDesignated lociAnnotation
ScoreStatus
rplF species11100
Finetyping antigens33100
Bexsero Antigen Sequence Typing (BAST)55100
MLST77100
Ribosomal MLST5353100
N. meningitidis cgMLST v21422140698

Analysis

rMLST species identification

RankTaxonTaxonomySupportMatches
SPECIES Neisseria meningitidis Pseudomonadota > Betaproteobacteria > Neisseriales > Neisseriaceae > Neisseria > Neisseria meningitidis 100%

Analysis performed: 2023-02-01

Similar isolates (determined by classification schemes)

Experimental schemes are subject to change and are not a stable part of the nomenclature.

Classification schemeUnderlying schemeClustering methodMismatch thresholdStatusGroup
Bact_rmlstc_5Ribosomal MLSTSingle-linkage5experimental762 (16 isolates)
Bact_rmlstc_4Ribosomal MLSTSingle-linkage4experimental1018 (5 isolates)
Bact_rmlstc_3Ribosomal MLSTSingle-linkage3experimental1180 (3 isolates)
Bact_rmlstc_2Ribosomal MLSTSingle-linkage2experimental1450 (3 isolates)
Bact_rmlstc_1Ribosomal MLSTSingle-linkage1experimental2021 (3 isolates)
Nm_cgc_200N. meningitidis cgMLST v2Single-linkage200experimental5 (3 isolates)
Nm_cgc_100N. meningitidis cgMLST v2Single-linkage100experimental6 (3 isolates)
Nm_cgc_50N. meningitidis cgMLST v2Single-linkage50experimental7 (3 isolates)
Nm_cgc_25N. meningitidis cgMLST v2Single-linkage25experimental7 (3 isolates)
Nm_cgc_10N. meningitidis cgMLST v2Single-linkage10experimental7 (2 isolates)
Bact_rmlstc_5Ribosomal MLSTSingle-linkage5experimental762 (16 isolates)
Bact_rmlstc_4Ribosomal MLSTSingle-linkage4experimental1018 (5 isolates)
Bact_rmlstc_3Ribosomal MLSTSingle-linkage3experimental1180 (3 isolates)
Bact_rmlstc_2Ribosomal MLSTSingle-linkage2experimental1450 (3 isolates)
Bact_rmlstc_1Ribosomal MLSTSingle-linkage1experimental2021 (3 isolates)
Nm_cgc_200N. meningitidis cgMLST v2Single-linkage200experimental5 (3 isolates)
Nm_cgc_100N. meningitidis cgMLST v2Single-linkage100experimental6 (3 isolates)
Nm_cgc_50N. meningitidis cgMLST v2Single-linkage50experimental7 (3 isolates)
Nm_cgc_25N. meningitidis cgMLST v2Single-linkage25experimental7 (3 isolates)
Nm_cgc_10N. meningitidis cgMLST v2Single-linkage10experimental7 (2 isolates)

Schemes and loci

Navigate and select schemes within tree to display allele designations

Tools

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