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Clonal complex designation

We have identified the common, largely non-overlapping clonal complexes within the database associated with ST. Clonal complexes here are defined as those STs that match the central genotype (ST) at four or more loci unless they more closely match another central genotype.

STs are assigned to clonal complexes automatically by a script that runs against the database each evening.

Currently defined complexes

Central STComplex name

This is not an exhaustive list of complexes, but those that are seen most frequently in the database and can usually be assigned unambiguously, with only minimal overlap with other complexes.

Citing the database

The preferred format for citing this website in publications is:

This publication made use of the Staphylococcus aureus MLST website (https://pubmlst.org/ saureus/) sited at the University of Oxford (Jolley et al. Wellcome Open Res 2018, 3:124 [version 1; referees: 2 approved]). The development of this site has been funded by the Wellcome Trust.


Sequence database
Sequences: 607,442
Profiles (MLST): 5975
Last updated: 2020-04-03

Isolate database
Isolates: 35,004
Last updated: 2020-04-03