. 2011 Jun 20;3(6):672–677. doi: 10.3390/toxins3060672

Table 1.

Spontaneous loss of vtxgenes after the first subcultivation step among EHEC O157 and non-O157 strains.

Serogroup	N° of Strains	Vtx Genes		*Spontaneous Loss of VtxGenes*
Serogroup	N° of Strains	Vtx1	Vtx2	Vtx1	Vtx2	Range (1–10)
O157	20	20	20	1	2	1–2
Non-O157
O26	3	3	1	2	0	2–3
O103	2	2	0	2	0	1–3
Non-Typed	15	15	3	3	2	1–8
Total	40	40	24	8	4	1–8