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Study Demonstrates Links Between Rainfall, Temperature, Dengue

by Sreeraman on November 18, 2009 at 12:12 PM Dengue News

A new study has found little evidence to show that factors like local rainfall and temperature have a significant impact on the incidence of dengue.

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Large outbreaks of dengue, a vector-borne viral disease spread by the Aedes aegypti mosquito, occur every few years in many tropical countries.

Michael Johansson, of the Centers for Disease Control and Prevention in Puerto Rico, used a technique called "wavelet analysis" to probe associations between the local climate, El Niqo-Southern Oscillation - the climate cycle that occurs every three to four years as a result of the warming of the oceans in the eastern Pacific, and incidence of dengue in Mexico, Puerto Rico and Thailand - three countries where dengue is endemic.

They were able to separate and compare seasonal and multiyear components of each.

In all three countries temperature, rainfall, and dengue incidence varied strongly on an annual scale, showing association in the wavelet analysis.

On the multiyear scale however, the researchers found no association between El Niqo and dengue incidence in Mexico, a statistically insignificant association in Thailand, and an association in Puerto Rico only significant for part of the study period.

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openscience(Guest)

02/22/2010

The information furnished by the investigators is really a good piece of work. However, much work needs to be done on how macro-climatic variables influence the breeding of dengue or other vectors. Real environmental manipulation or management of vector control then only could become a real vision
G. Rajendran

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Study Demonstrates Links Between Rainfall, Temperature, Dengue

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