Dynamics of ampicillin-resistant Enterococcus faecium clones colonizing hospitalized patients: data from a prospective observational study

Table 2 Within-patient distribution of E. faecium isolates

	Hematology UHBS		ICU UMCU
	Group 1a	Group 1b	Group 2
Patients, n	33	21	25
- with ARE, n (%)	13 (40%)	3 (14%)	21 (84%)
- with only ASE, n (%)	9 (27%)	9 (43%)	2 (8%)
- with no E. faecium, n (%)	11 (33%)	9 (43%)	2 (8%)
Patients with only one MT of ARE
- MT159	1	2	9
- Other ARE	3	0	3
Patients with replacements^a of E. faecium
- ASE to ARE	6	0	0
- ARE to ASE	1	0	2
- ARE change of MT	2	1	7

UHBS University Hospital Basel; ICU Intensive Care Unit; UMCU University Medical Center Utrecht; ARE ampicillin-resistant E. faecium; ASE ampicillin-susceptible E. faecium ^a Replacement of an ampicillin-susceptible by an ampicillin-resistant clone in consecutive swab or vice versa or replacement of an ARE by a different ARE MT clone

ISSN: 1471-2334