Fig. 2

Dissemination of ehxA subtypes, replicon types, and their associations in the 96 STEC isolates in Iran. A total of 56 ehxA-positive isolates were identified, with the majority (83.9%) classified as subtype A, followed by subtypes C (12.5%), and D (3.5%) (A). Among the 76 STEC isolates containing plasmids, the most common replicon type was FIB (82.8%), with additional types including IncK/B (27.6%), IncB/O (14.4%), IncP (10.5%), and others (B). The heat map illustrates the co-occurrence of ehxA subtypes and replicon types in these isolates (C).