Table 2. Frequency of stx subtype profiles including stx1, derived from WGS analysis, not including outbreak strains.

When a multi subtype result has a ‘?,’ it indicates that the only evidence suggesting the presence of multiple copies was the relative coverage (as opposed to having mixed positions as well).

stx profile	Frequency
1a/2a	9
1a/2a/2c	3
1a/2c	64
1a/multi-stx2c?	10
2a	30
2a/2c	136
2c	51
multi-1a?/2c	9
multi-1a/2c	3
multi-stx2a	31
multi-stx2c?/multi-1a?	2
No stx detected	1