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Volume 15, Number 1—January 2009

Research

Enhanced Hygiene Measures and Norovirus Transmission during an Outbreak

Janneke C.M. Heijne1Comments to Author , Peter Teunis1, Gabriella Morroy, Clementine Wijkmans, Sandy Oostveen, Erwin Duizer, Mirjam Kretzschmar, and Jacco Wallinga
Author affiliations: National Institute for Public Health and the Environment, Bilthoven, the Netherlands (J.C.M. Heijne, P. Teunis, E. Duizer, M. Kretzchmar, J. Wallinga); Emory University, Atlanta, Georgia, USA (P. Teunis); Municipal Health Services “Hart voor Brabant,” ‘s-Hertogenbosch, the Netherlands (G. Morroy, C. Wijkmans, S. Oostveen); University Medical Center Utrecht, Utrecht, the Netherlands (M. Kretzschmar, J. Wallinga);

Main Article

Table

New norovirus cases during outbreak at international scout jamboree, the Netherlands, starting on Jul 26, 2004 (day 0), by day of symptom onset and camp label

Day of onset Camp, no. new cases/d
Total
(n = 4,500)
A
(n = 485) B
(n = 721) C
(n = 729) D
(n = 499) E
(n = 735) F
(n = 825*) G
(n = 506) Unknown
0 1 1 0 0 0 0 0 0 2
1 1 0 1 0 0 0 0 2 4
2 0 2 2 1 1 3 0 1 10
3 2 7 9 0 2 1 0 1 22
4 3 4 2 1 2 2 4 0 18
5 0 10 1 2 1 1 2 2 19
6 0 12 3 2 2 0 0 1 20
7 2 19 14 2 3 3 6 3 52
8 3 5 8 2 2 1 1 0 22
9 7 10 14 0 2 10 24 2 69
10 5 4 3 2 0 16 8 11 49
11 3 2 4 1 0 1 1 3 15
12 4 1 4 2 1 1 0 2 15
13 0 0 1 0 0 0 1 1 3
14 0 0 1 0 0 1 0 1 3
15
0
0
1
0
1
1
0
0
3
Total† 31 77 68 15 17 41 47 30 326

*This number is estimated.
†Overall attack rate: 7.2. Attack rate by camp: A, 6.4; B, 10.7; C, 9.3; D, 3.0; E, 2.3; F, 5.0; G, 9.3.

Main Article

1These authors contributed equally to this article.

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