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Volume 14, Number 5—May 2008
Dispatch

Increase in West Nile Neuroinvasive Disease after Hurricane Katrina

Kevin A. Caillouët*Comments to Author , Sarah R. Michaels*, Xu Xiong*, Ivo Foppa*, and Dawn M. Wesson*
Author affiliations: *Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana, USA;

Main Article

Table 1

West Nile neuroinvasive disease (WNND) before and after Hurricane Katrina for the 3 years before the storm (2002–2004), the year of the storm (2005), and the year after the storm (2006) in Louisiana parishes and Mississippi counties*

State Affected areas
Unaffected areas
CDC weeks 32–34†
CDC weeks 35–37‡
CDC weeks 32–34†
CDC weeks 35–37‡
WNND cases 95% CI WNND cases 95% CI WNND cases 95% CI WNND cases 95% CI
Louisiana
2002 22 14.6–33.3 8 4.1–15.8 37 26.9–51.0 20 13.0–30.9
2003 2 0.6–7.2 3 1.09–8.8 18 11.4–28.5 16 9.9–26.0
2004 1 0.2–5.6 1 0.2–5.6 23 15.4–34.5 11 6.2–19.7
2005 0 0–3.0§ 11 6.2–19.7§ 28 19.4–40.5 12 6.9–21.0
2006
11
6.2–19.7

8
4.1–15.8

13
7.7–22.2

16
9.9–26.0
Mississippi
2002 13 7.7–22.2 12 6.9–21.0 38 27.7–52.2 21 13.8–32.1
2003 3 1.1–8.8 3 1.1–8.8 5 2.2–11.7 4 1.6–10.2
2004 1 0.2–5.6 2 0.6–7.2 12 6.9–21.0 4 1.6–10.2
2005 0 0–3.0§ 10 5.5–18.4§ 8 4.1–15.8 10 5.5–18.4
2006 12 6.9–21.0 9 4.8–17.1 14 8.4–23.5 9 4.8–17.1

*CDC, Centers for Disease Control and Prevention; CI, confidence interval (Poisson).
†3 weeks before landfall of hurricane.
‡3 weeks after landfall of hurricane.
§p<0.05.

Main Article

Page created: July 08, 2010
Page updated: July 08, 2010
Page reviewed: July 08, 2010
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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