TABLE 2.

Identification of conserved, unique, and group-specific genes in E. coli

E. coli strain	Pathovara	No. of genes	No. of conserved genesb	No. of unique genesc	No. of group-specific genesd
K-12	Commensal	4,238	2,312	21	11
W3110	Commensal	4,384	2,324	31	11
HS	Commensal	4,433	2,321	94	11
E24377A	ETEC	5,111	2,318	246	5
B7A	ETEC	5,357	2,446	256	4
EDL933	EHEC	4,863	2,327	27	122
Sakai	EHEC	5,497	2,337	208	126
CFT073	ExPEC/UPEC	5,589	2,341	308	56
F11	ExPEC/UPEC	5,198	2,412	203	46
UTI89	ExPEC/UPEC	5,176	2,288	109	45
536	ExPEC/UPEC	4,734	2,347	134	46
APEC01	ExPEC/Avian	4,561	2,295	158	3d
E22	EPEC	5,575	2,343	274	5
E110019	EPEC	5,586	2,397	219	4
B171	EPEC	5,330	2,382	234	6
Ec042	EAEC	4,899	2,305	308	3
101-1	EAEC	4,812	2,356	155	4

^aPathovar assignment is based on previous identification of the strain (see references).

^bConserved genes are genes whose BSR is ≥0.8 in all isolates.

^cUnique genes are genes whose BSR is <0.4 in all other isolates tested.

^dGroup-specific genes are genes whose BSR is >0.8 in the members of the group but <0.4 in all other isolates.