Featured Research

from universities, journals, and other organizations

Local Climate Influences Dengue Transmission

Date:
February 16, 2009
Source:
Public Library of Science
Summary:
Researchers have found that dengue transmission in Puerto Rico is dependent upon local climate and short-term changes in temperature and precipitation.

Researchers from the US Centers for Disease Control and Prevention (CDC) and the Johns Hopkins Bloomberg School of Public Health have found that dengue transmission in Puerto Rico is dependent upon local climate and short-term changes in temperature and precipitation.

Related Articles


"Previous studies have shown that there are biological relationships between temperature, precipitation and dengue transmission, but empirical evidence of these relationships is inconsistent," says Michael Johansson, a postdoctoral fellow with the CDC's National Center for Zoonotic, Vector-Borne and Enteric Diseases Dengue Branch in San Juan, Puerto Rico.

"This finding on how local climate moderates the relationship between temperature, precipitation and dengue incidence helps explain previous discrepancies," he says. "It also suggests that the effects of global climate change on dengue transmission will be local rather than global."

The study looked at 20 years of data from 77 municipalities in Puerto Rico to demonstrate how local climate alters the patterns of disease transmission. The researchers found that even in a relatively small geographical area there were differences in the relationship between weather and dengue transmission.

For example, in the southwestern coast, where it is hot and dry, precipitation played a very strong role and temperature a lesser role in dengue transmission. In these dry areas, the lack of water limits mosquito reproduction. In contrast, in the cooler central mountains, temperature is more important and precipitation less important because the lower temperatures there slow mosquito and virus development.

Dengue is a disease caused by any one of four closely related viruses (DENV-1, DENV-2, DENV-3, or DENV-4). The viruses are transmitted to humans by the bite of an infected mosquito. The dengue viruses are the most widely distributed and damaging arthropod-borne viruses (arboviruses) affecting humans. The viruses and their predominant mosquito vector, Aedes aegypti, are endemic to most of the tropical and subtropical regions of the world, where they cause seasonal epidemics varying in size. In Puerto Rico, thousands of dengue cases and several dengue-related deaths are reported every year.


Story Source:

The above story is based on materials provided by Public Library of Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Johansson MA, Dominici F, Glass GE. Local and Global Effects of Climate on Dengue Transmission in Puerto Rico. PLoS Negl Trop Dis, 3(2): e382 DOI: 10.1371/journal.pntd.0000382

Cite This Page:

Public Library of Science. "Local Climate Influences Dengue Transmission." ScienceDaily. ScienceDaily, 16 February 2009. <www.sciencedaily.com/releases/2009/02/090216201004.htm>.
Public Library of Science. (2009, February 16). Local Climate Influences Dengue Transmission. ScienceDaily. Retrieved November 29, 2014 from www.sciencedaily.com/releases/2009/02/090216201004.htm
Public Library of Science. "Local Climate Influences Dengue Transmission." ScienceDaily. www.sciencedaily.com/releases/2009/02/090216201004.htm (accessed November 29, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Saturday, November 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Rural India's Low-Cost Sanitary Pad Revolution

Rural India's Low-Cost Sanitary Pad Revolution

AFP (Nov. 28, 2014) — One man hopes his invention -– a machine that produces cheap sanitary pads –- will help empower Indian women. Duration: 01:51 Video provided by AFP
Powered by NewsLook.com
Research on Bats Could Help Develop Drugs Against Ebola

Research on Bats Could Help Develop Drugs Against Ebola

AFP (Nov. 28, 2014) — In Africa's only biosafety level 4 laboratory, scientists have been carrying out experiments on bats to understand how virus like Ebola are being transmitted, and how some of them resist to it. Duration: 01:18 Video provided by AFP
Powered by NewsLook.com
WHO Says Male Ebola Survivors Should Abstain From Sex

WHO Says Male Ebola Survivors Should Abstain From Sex

Newsy (Nov. 28, 2014) — WHO cites four studies that say Ebola can still be detected in semen up to 82 days after the onset of symptoms. Video provided by Newsy
Powered by NewsLook.com
Ebola Leaves Orphans Alone in Sierra Leone

Ebola Leaves Orphans Alone in Sierra Leone

AFP (Nov. 27, 2014) — The Ebola epidemic sweeping Sierra Leone is having a profound effect on the country's children, many of whom have been left without any family members to support them. Duration: 01:02 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins