Figure 2
Origin of VTEC O157 strains being PT4, vtx 2 and vtx 2 c . Map of (a) cattle farms implicated in human EHEC cases, viz-á-vis a map illustrating the geographical origin of the (b) randomly isolated VTEC O157 strains. Strains being PT4, vtx2 and vtx2cmarked (●); other (○)