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Volume 18, Number 10—October 2012

CME ACTIVITY - Research

Epidemiology of Foodborne Norovirus Outbreaks, United States, 2001–2008

Aron J. HallComments to Author , Valerie G. Eisenbart, Amy Lehman Etingüe, L. Hannah Gould, Ben A. Lopman, and Umesh D. Parashar
Author affiliations: Centers for Disease Control and Prevention, Atlanta, Georgia, USA (A.J. Hall, V.G. Eisenbart, A. Lehman Etingüe, L.H. Gould, B.A. Lopman, U.D. Parashar); University of Illinois, Urbana, Illinois, USA (V.G. Eisenbart); and North Carolina State University, Raleigh, North Carolina, USA (A. Lehman Etingüe)

Main Article

Table 2

Settings of food preparation in foodborne norovirus outbreaks, United States, 2001–2008*

Setting† No. (%) outbreaks Median no. cases/outbreak (IQR)
Commercial 2,432 (83) 14 (7–26)

Restaurant or delicatessen

1,824 (62) 12 (6–23)

Caterer

313 (11) 25 (16–40)

Banquet facility

110 (4) 30 (19–59)

Grocery store

105 (4) 13 (9–18)

Commercial product served without further preparation

42 (1) 20 (11–30)

Wedding reception

22 (1) 25 (18–35)

Fair, festival, other temporary/mobile service

16 (1) 21 (6–50)
Institutional 248 (8) 36 (19–71)

School

91 (3) 43 (29–92)

Nursing home

66 (2) 35 (19–60)

Camp

29 (1) 34 (18–53)

Noncafeteria workplace

18 (1) 23 (13–56)

Prison or jail

15 (1) 58 (23–137)

Workplace cafeteria

12 (0.4) 22 (18–78)

Hospital

11 (0.4) 53 (16–72)

Day care center

4 (0.1) 31 (19–65)

Office setting

2 (0.1) 18 (15–21)
Private 336 (11) 16 (10–26)

Private home

296 (10) 15 (9–25)

Church, temple, or other place of worship

31 (1) 23 (12–40)

Picnic

9 (0.3) 19 (12–32)

Other/Unknown

267 (9) 28 (14–49)
All outbreaks 2,922 (100) 14 (8–30)

*IQR, interquartile range.
†Multiple locations may be implicated in a given outbreak.

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