The engine flagged the reference dataset for this species — review the signals below before relying on these thresholds.
Derived from 32,116 genomes: 139 from RefSeq and 31,977 from other sources. For the derivation pipeline and the PASS / WARN / FAIL verdict model, see the methods page for qualibact-v1.1.
QualiBact qualibact-v1.1 thresholds for Neisseria meningitidis, refined from v1.0 based on expert-feedback survey (Nov 2025).
The upper bound for assembly size has been tightened from 2.4 Mb to 2.3 Mb at the request of the N. meningitidis subgroup, whose dataset shows genome sizes consistently below 2.3 Mb. The more conservative upper bound flags potentially contaminated or chimeric assemblies that the looser v1.0 threshold would have passed.
All other thresholds inherit from v1.0, including the native warning limits. The genome-size warning interval is 2.0–2.3 Mb; assemblies above 2.3 Mb fail this criterion. See the methods page for qualibact-v1.1 for the full derivation.
Threshold values and rationale for Neisseria meningitidis (qualibact-v1.1) contributed by:
Supported by: Instituto Nacional de Saúde Doutor Ricardo Jorge; GENEO project (Project No. 101113460; co-funded by the European Union under the EU4Health Programme (EU4H)).
This table summarises the distribution of each metric, including standard deviation, mean, median, and percentiles.
A combined summary table across all species is available on the summary page.
| Metric | Distribution | n | Mean | SD | Min | Q1 | Median | Q3 | Max |
|---|---|---|---|---|---|---|---|---|---|
| N50 | non-normal | 31,977 | 46,551 | 13,746 | 12,980 | 35,376 | 47,804 | 57,668 | 116,825 |
| no_of_contigs | non-normal | 31,977 | 186.87 | 37.95 | 72 | 162 | 186 | 209 | 348 |
| longest | non-normal | 31,977 | 154,109 | 43,742 | 43,472 | 120,951 | 154,618 | 176,675 | 391,188 |
| GC_Content | non-normal | 31,977 | 51.72 | 0.17 | 51.22 | 51.58 | 51.73 | 51.83 | 52.32 |
| Completeness_Specific | non-normal | 31,977 | 99.99 | 0.01 | 99.95 | 99.99 | 99.99 | 100 | 100 |
| Contamination | non-normal | 31,977 | 0.01 | 0.02 | 0 | 0 | 0 | 0.01 | 0.45 |
| Total_Coding_Sequences | non-normal | 31,977 | 2,046 | 57.31 | 1,893 | 2,007 | 2,041 | 2,088 | 2,286 |
| Genome_Size | non-normal | 31,977 | 2,128,892 | 45,021 | 1,994,401 | 2,096,751 | 2,126,309 | 2,162,763 | 2,303,681 |
Full statistics including KS test vs RefSeq and Wasserstein distance are in the downloadable summary.csv.
Derived from 32,116 genomes including 139 RefSeq references
Both Fail and Warn bands shown as the published rounded values — easier to cite and consistent across the species page, CSV downloads, and downstream QC tools.
| Metric | Fail below | Warn below | Warn above | Fail above |
|---|---|---|---|---|
| Genome_Size | 2,000,000 | 2,000,000 | 2,300,000 | 2,300,000 |
| GC_Content | 51.05 | 51.42 | 52.08 | 52.15 |
| Total_Coding_Sequences | 1,900 | 1,900 | 2,200 | 2,500 |
| Completeness_Specific | 97 | 99 | - | - |
| Contamination | - | - | 1 | 3 |
| N50 | 19,000 | 23,000 | - | - |
| no_of_contigs | - | - | 270 | 310 |
| longest | - | - | - | - |
How to read this: A value outside a failure limit fails QC. Within the failure limits, values beyond a warning limit are borderline and worth a manual look; values within the warning limits pass that criterion. A dash means that no bound is defined on that side.