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Volume 11, Number 9—September 2005

West Nile Virus–infected Mosquitoes, Louisiana, 2002

Marvin S. Godsey*, Roger Nasci*, Harry M. Savage*, Stephen Aspen*, Raymond King*, Ann M. Powers*, Kristen Burkhalter*, Leah Colton*, Dawn Charnetzky*, Sarah Lasater*, Viki Taylor†, and Charles T. Palmisano†
Author affiliations: *Centers for Disease Control and Prevention, Fort Collins, Colorado, USA; †St. Tammany Parish Mosquito Abatement District, Slidell, Louisiana, USA

Main Article

Table 4

Estimated mosquito pool West Nile virus (WNV) infection rates per 1,000 mosquitoes and 95% confidence intervals (CIs)*

Parish Site† Sampling period Trap type‡ WNV+ pools Species No. mosquitoes tested Infection rate: MLE (95% CI)
St. Tammany B Aug 3–6 Light 1 Cx. salinarius 92 10.91 (5.46–21.83)
E Aug 12–15 Gravid 2 Cx. quinquefasciatus 829 2.61 (1.31–5.22)
F Aug 12–15 Gravid 1 Cx. quinquefasciatus 427 2.31 (1.16–4.62)
l Aug 14–15 Gravid 1 Cx. quinquefasciatus 223 5.64 (2.82–11.28)
Tangipahoa A Aug 7–10 Light 1 Cq. perturbans 1,223 0.81 (0.41–1.62)
B Aug 7–10 Gravid 3 Cx. quinquefasciatus 922 3.41 (1.71–6.82)

*Calculated by using a bias-corrected maximum likelihood estimate (MLE).
†Capital letters denote confirmed WNV neuroinvasive disease and WNV fever case sites; italicized lower case letters denote non-WNV case sites.
‡Light denotes CO2-baited CDC miniature light trap; gravid denotes Reiter gravid trap.

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Page created: April 23, 2012
Page updated: April 23, 2012
Page reviewed: April 23, 2012
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