TABLE 1.

Description of 20 outbreaks analyzed by whole-genome sequencing

Outbreak	Epidemiological category	No of cases	Reason for outbreak investigation	MRSA or MSSA	Clonal complex	MLSTa	spa	Duration (days)	PFGE pulsotypes	Outbreak antibiograms
A	Hospital, general ward	5	MRSA colonization	MRSA	CC22	ST22	t032	367	All identical	All identical
B	Hospital, general ward	6	S. aureus wound infections	MSSA	CC8	ST2021	t008	412	All identical	All identical
C	Hospital, general ward	7	S. aureus wound infections	MRSA	CC8	ST239	t037	98	All identical	All identical
D	Hospital, general ward	17	MRSA colonization	MRSA	CC8	ST8	t008	88	All identical	All identical
E	Hospital, surgical unit	8	S. aureus wound infections	MRSA	CC22	ST22	t022	18	All identical	All identical
F	Hospital, multiple wards	50	MRSA colonization	MRSA	CC5	ST228	t041	122	2 pulsotypes	All identical
G	Hospital, multiple wards	187	MRSA colonization	MRSA	CC8	ST8	t008	454	4 pulsotypes	3 antibiograms
H	Hospital, maternity unit	6	PVL-related SSTIsb	MRSA	CC1	ST772	t657	70	All identical	All identical
I	Hospital, maternity unit	9	Scalded skin syndrome	MSSA	CC15	ST2434	t346	70	All identical	2 antibiograms
J	Hospital, neonatal unit	3	MRSA colonization	MRSA	CC59	ST59	t216	8	All identical	All identical
K	Hospital, neonatal unit	4	MRSA colonization	MRSA	CC22	ST22	t5892	43	All identical	All identical
L	Hospital, neonatal unit	6	MRSA colonization	MRSA	CC30	ST30	t019	57	All identical	All identical
M	Hospital, neonatal unit	8	MRSA bacteremia	MRSA	CC88	ST88	t5973	65	All identical	3 antibiograms
N	Hospital, neonatal unit	41	MRSA colonization	MRSA	CC22	ST22	t5892	1526	All identical	2 antibiograms
O	Household	3	PVL-related SSTIs	MRSA	CC30	ST30	t019	8	All identical	All identical
P	Household	4	PVL-related SSTIs	MRSA	CC30	ST30	t019	20	3 pulsotypes	All identical
Q	Household	5	PVL-related SSTIs	MRSA	CC30	ST30	t019	195	2 pulsotype	All identical
R	Household	8	PVL-related SSTIs	MRSA	CC30	ST30	t019	44	All identical	2 antibiograms
S	Nursing home	9	PVL-related SSTIs	MRSA	CC30	ST30	t019	298	2 pulsotypes	3 antibiograms
T	School	5	PVL-related SSTIs	MSSA	CC121	ST121	t645	74	All identical	All identical

^aMLST: multi-locus sequence-type.

^bPVL: Panton-Valentine leukocidin; SSTI, skin/soft tissue infection.