FIG. 4.
Graphical representation of the variation in the number of A repeat (252-bp) and C repeat (246-bp) units among esp-positive blood, endocarditis, and stool isolates of E. faecalis. Repeat number variation was assessed by PCR as described in Materials and Methods, with primer pairs esp46 and esp47 (A repeats) and esp2 and esp5 (C repeats).