TABLE 1.

Characteristics of 34 E. coli isolates shown in chronological order^a

Strain no., origin	Site of isolation	Date of isolation (day/mo/yr)	PFGE type	RAPD type	Phylogenetic group
1, colonized neonate	Rectal swab	24.03.09	I	α	A
2, colonized neonate	Rectal swab	25.03.09	I	α	A
3, colonized neonate	Rectal swab	31.03.09	I	α	A
4, colonized neonate	Rectal swab	31.03.09	I	α	A
5, colonized neonate	Rectal swab	7.04.09	I	α	A
6, neonate with meningitis	Rectal swab	7.04.09	I	α	A
7, colonized neonate	Rectal swab	7.04.09	I	α	A
8, colonized neonate	Rectal swab	7.04.09	I	α	A
9, colonized neonate	Rectal swab	7.04.09	I	α	A
10, colonized neonate	Rectal swab	7.04.09	I	α	A
11, control patient 1	Rectal swab	7.04.09	II	ß	D
12, colonized neonate	Rectal swab	7.04.09	I	α	A
13, neonate with meningitis	CSF	12.04.09	I	α	A
14, neonate with meningitis	Blood culture	12.04.09	I	α	A
15, colonized neonate	Rectal swab	14.04.09	I	α	A
16, colonized neonate	Rectal swab	14.04.09	I	α	A
17, colonized neonate	Rectal swab	14.04.09	I	α	A
18, colonized neonate	Rectal swab	14.04.09	I	α	A
19, colonized neonate	Rectal swab	14.04.09	I	α	A
20, colonized neonate	Rectal swab	14.04.09	I	α	A
21, colonized neonate	Rectal swab	14.04.09	I	α	A
22, colonized neonate	Rectal swab	21.04.09	I	α	A
23, colonized neonate	Rectal swab	21.04.09	I	α	A
24, colonized neonate	Rectal swab	21.04.09	I	α	A
25, colonized neonate	Rectal swab	21.04.09	I	α	A
26, colonized neonate	Rectal swab	21.04.09	I	α	A
27, colonized neonate	Rectal swab	21.04.09	I	α	A
28, colonized neonate	Rectal swab	27.04.09	I	α	A
29, colonized neonate	Rectal swab	27.04.09	I	α	A
30, mother's milk 1	Milk sample	28.04.09	I	α	A
31, colonized neonate	Eye	29.04.09	I	α	A
32, mother's milk 2	Milk sample	11.05.09	I	α	A
33, control patient 2	Rectal swab	13.05.09	III	γ	B2
34, control patient 3	Rectal swab	13.05.09	IV	δ	B2

^aAll isolates except the control strains (no. 11, 33, and 34) showed identical PFGE and RAPD types and belong to phylogenetic group A, as determined by the triplex PCR method.