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reference : Infectious disease in a warming world: How weather influenced West Nile virus in the United States (2001â2005)
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| reftype | Journal Article |
| Abstract | BACKGROUND: The effects of weather on West Nile virus (WNV) mosquito populations in the United States have been widely reported, but few studies assess their overall impact on transmission to humans. OBJECTIVES: We investigated meteorologic conditions associated with reported human WNV cases in the United States. METHODS: We conducted a case-crossover study to assess 16,298 human WNV cases reported to the Centers for Disease Control and Prevention from 2001 to 2005. The primary outcome measures were the incidence rate ratio of disease occurrence associated with mean weekly maximum temperature, cumulative weekly temperature, mean weekly dew point temperature, cumulative weekly precipitation, and the presence of > or = 1 day of heavy rainfall (> or = 50 mm) during the month prior to symptom onset. RESULTS: Increasing weekly maximum temperature and weekly cumulative temperature were similarly and significantly associated with a 35-83% higher incidence of reported WNV infection over the next month. An increase in mean weekly dew point temperature was significantly associated with a 9-38% higher incidence over the subsequent 3 weeks. The presence of at least 1 day of heavy rainfall within a week was associated with a 29-66% higher incidence during the same week and over the subsequent 2 weeks. A 20-mm increase in cumulative weekly precipitation was significantly associated with a 4-8% increase in incidence of reported WNV infection over the subsequent 2 weeks. CONCLUSIONS: Warmer temperatures, elevated humidity, and heavy precipitation increased the rate of human WNV infection in the United States independent of season and each others' effects. |
| Author | Soverow, J. E.; Wellenius, G. A.; Fisman, D. N.; Mittleman, M. A. |
| DOI | 10.1289/ehp.0800487 |
| Date | Jul |
| ISSN | 1552-9924 |
| Issue | 7 |
| Journal | Environmental Health Perspectives |
| Keywords | Animals; *Greenhouse Effect; Humans; Humidity; Insect Vectors/virology; Rain; Temperature; United States; *Weather; West Nile Fever/epidemiology/*transmission/virology; West Nile virus/*physiology |
| Notes | Soverow, Jonathan E Wellenius, Gregory A Fisman, David N Mittleman, Murray A eng F32-ES013804/ES/NIEHS NIH HHS/ K99 ES015774/ES/NIEHS NIH HHS/ K99 ES015774-02/ES/NIEHS NIH HHS/ K99-ES015774/ES/NIEHS NIH HHS/ P01-ES009825/ES/NIEHS NIH HHS/ R00 ES015774/ES/NIEHS NIH HHS/ Research Support, N.I.H., Extramural 2009/08/06 09:00 Environ Health Perspect. 2009 Jul;117(7):1049-52. doi: 10.1289/ehp.0800487. Epub 2009 Mar 16. |
| Pages | 1049-1052 |
| Title | Infectious disease in a warming world: How weather influenced West Nile virus in the United States (2001â2005) |
| Volume | 117 |
| Year | 2009 |
| .reference_type | 0 |
| _record_number | 18038 |
| _uuid | 27a5a1a9-3bcd-4b5d-a57a-b1f452058253 |
