Table 1.

Bacterial species testing positive for the presence of the colibactin determinant

	No. of strains screened	clb-positive strains	Predominant sequence types
Escherichia coli	19 200	1462	ST12, ST127, ST141, ST2015, ST372, ST404, ST550, ST625, ST73, ST80, ST95, ST998
Klebsiella pneumoniae	8038	572	ST11, ST23, ST234, ST258, ST3, ST48
Klebsiella aerogenes	222	101	ST4, ST93
Citrobacter koseri	35	27	na
Enterobacter hormaechei	711	2	na
Enterobacter cloacae	610	2	na
Serratia marcescens	515	1	na
Klebsiella michiganensis	94	1	na
Salmonella sp.	8	1*	na
Erwinia oleae	1	1	na
Frischella perrara	3	3	na

*Unverified source organism (excluded from Refseq).