The majority of genes in the pathogenic Neisseria species are present in non-pathogenic Neisseria lactamica, including those designated as 'virulence genes'
2006

Genes in Neisseria lactamica and Pathogenic Neisseria

Sample size: 13 publication Evidence: moderate

Author Information

Author(s): Lori A. Snyder, Nigel J. Saunders

Primary Institution: University of Oxford

Hypothesis

Which genes associated with virulence in pathogenic Neisseria are also present in the non-pathogenic Neisseria lactamica?

Conclusion

Most genes considered virulence genes in pathogenic Neisseria are also found in Neisseria lactamica, which is not pathogenic.

Supporting Evidence

  • 85 out of 127 assessed virulence genes were found in N. lactamica.
  • 1,373 out of 1,473 probes for genes common to pathogenic Neisseria hybridized with N. lactamica.
  • Thirteen unrelated strains of N. lactamica were used to ensure diversity in the study.

Takeaway

This study found that many of the genes that make some Neisseria bacteria harmful are also found in a harmless cousin, showing that being harmful isn't just about having certain genes.

Methodology

Thirteen strains of N. lactamica were assessed using comparative genome hybridization to a microarray designed for Neisseria species.

Limitations

The study's findings may be influenced by the microarray design and the presence of divergent alleles.

Digital Object Identifier (DOI)

10.1186/1471-2164-7-128

Want to read the original?

Access the complete publication on the publisher's website

View Original Publication