Emerging Infectious Disease ISSN: 1080-6059

Invasive Group A Streptococcal Disease in Nursing Homes, Minnesota, 1995–2006

Jean Rainbow*

, Brenda Jewell*, Richard N. Danila*, David Boxrud*, Bernard Beall†, Chris Van Beneden†, and Ruth Lynfield*

Author affiliations: *Minnesota Department of Health, St. Paul, Minnesota, USA; †Centers for Disease Control and Prevention, Atlanta, Georgia, USA;

Clusters of invasive group A streptococcal disease in nursing homes, Minnesota, April 1995–2006

Facility	Year(s)	Month of onset for first case	No. cases	Interval between first and second case	Interval between first and last case	emm type
A	1995	Apr	4	1 mo	7 mo	01
B	1996–1997	Jan	5	10 mo	16 mo	89
C	1998	Feb	2	5 mo	5 mo	01
D	2000	May	2	2 mo	2 mo	82
E	2001	Apr	2	3 wk	3 wk	01
F	2002	Feb	2	9 mo	9 mo	28
G	2002	Mar	3	3 wk	3 mo	01
H	2002–2003	Dec	3	3 mo	3.5 mo	03
I	2003	Jan	2	2 mo	2 mo	89
J	2003	May	2	1 wk	1 wk	28
K	2003	Feb	3	2 wk	9 mo	01
L	2003–2004	Dec	2	1 mo	1 mo	12
M	2004	Feb	2	4 d	4 d	05