Histogram of the digital DDH similarities between the type strain, DSM 30083T
, and other genome-sequenced E. coli strains as well as outgroups. Interesting groups are marked by Roman numerals I-VII: Escherichia hermannii and Shimwellia blattae (I), E. fergusonii and E. albertii (II), E. sp. TW09308 (III), E. coli (IV-VII). Regarding the revised phylotypes from  (compare Figure 6), phylotype B2 is covered by dDDH groups V, VI, and VII with VII being the group containing (among other strains) type strain DSM 30083T itself and its closest relative E. coli S88. IV marks the biggest group which includes phylotypes A, B1, D1, D2, D3, E, F1, F2 and Shigella I, IIa, IIb and III. The full list of dDDH values and affiliation to phylotypes is contained in Additional file 2.