TABLE 2.

E. coli isolates from clams and sediments showing positivity for the IncI1α group: phylogroups, resistance genes and plasmid sizes.

E. coli strain	Phylo-group	Resistance genes	PBRT replicon	Plasmid size (∼kb)
Clams
ISZ 220	C	blaTEM, tet(A), dfrA1, aadA	I1α – FIB – FII – M	110, 95, 55
ISZ 276	D	strA, strB	I1α	90
ISZ 61	E	blaTEM, dfrA1, strA, aadA, ant(3″)	I1α – FIB – FII – N	140, 80, 40
ISZ 80	F	–	I1α	85
ISZ 210	A	–	I1α – FIB	110, 95
ISZ 211	A	–	I1α – FIB – FIA	80, 40
ISZ 255	B1	–	I1α	80
ISZ 274	A	blaTEM	I1α	90
ISZ 325	B2	tet(A)	I1α	90
Sediments
PN41	A	tet(A)	I1α	95
PN44	A	tet(A)	I1α	95
PN16	B1	–	I1α	85
PN29	B1	blaTEM, tet(A), strA, strB	I1α – FIB – FII	145, 75
PN30	B1	blaTEM, tet(A), strA, strB	I1α – FIB – FII	145, 75