Featured Research

from universities, journals, and other organizations

Climate And Cholera: An Increasingly Important Link

Date:
September 3, 2002
Source:
University Of Michigan
Summary:
The link between climate and cholera, a serious health problem in many parts of the world, has become stronger in recent decades, say researchers from the University of Michigan, the University of Barcelona and the International Center for Diarrhoeal Disease Research in Bangladesh.

ANN ARBOR --- The link between climate and cholera, a serious health problem in many parts of the world, has become stronger in recent decades, say researchers from the University of Michigan, the University of Barcelona and the International Center for Diarrhoeal Disease Research in Bangladesh.

Their research will be published in the online version of the Proceedings of the National Academy of Sciences this week.

In a previous study published in the journal Science, the researchers found evidence that El Nino-Southern Oscillation (ENSO), a major source of climate variability from year to year, influences cycles of cholera. In that work, they looked only at climate and disease data from Bangladesh for the past two decades. In the new research, they compared those results with data from Bangladesh for the periods 1893-1920 and 1920-1940 to see whether the coupling between climate variability and cholera cycles has become stronger in recent decades. Their examination of the data, which relied on a suite of techniques called time series analysis, suggests that it has.

“What is new in this work is not showing that ENSO plays a role in the variability of cholera, but that the role of ENSO has intensified,” says Mercedes Pascual, an assistant professor in the department of Ecology and Evolutionary Biology at the University of Michigan. In addition, the link is strongest following ENSO events, with cholera increasing after warm events and decreasing after cold events. In the years between events, the climate-cholera connection breaks down.

Scientists who study climate change predict that ENSO will become stronger and more variable in coming years under a global warming scenario, so understanding how its connection to human disease changes will be increasingly important, says Pascual.

Cholera, an intestinal infection with symptoms that may include diarrhea, vomiting and leg cramps, is caused by the bacterium Vibrio cholerae. People usually get the disease by eating or drinking contaminated food or water.

The greater role of ENSO in cholera dynamics probably reflects known changes in ENSO itself, the researchers believe. Since the late 1970s, there has been a tendency toward warmer ENSO events, in conjunction with global warming. Because the disease-causing bacterium lives in brackish water and thrives in warm temperatures, it may be particularly sensitive to climate patterns. People also may be more likely to come in contact with contaminated water in warmer weather.

Other diseases, such as malaria and dengue, may be similarly affected by climate variability, says Pascual. But because other factors, such as patterns of immunity, also lead to cycles in disease dynamics, Pascual and her colleagues are working on methods to sort out the relative roles of climate and intrinsic factors such as temporary immunity.


Story Source:

The above story is based on materials provided by University Of Michigan. Note: Materials may be edited for content and length.


Cite This Page:

University Of Michigan. "Climate And Cholera: An Increasingly Important Link." ScienceDaily. ScienceDaily, 3 September 2002. <www.sciencedaily.com/releases/2002/09/020903070858.htm>.
University Of Michigan. (2002, September 3). Climate And Cholera: An Increasingly Important Link. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2002/09/020903070858.htm
University Of Michigan. "Climate And Cholera: An Increasingly Important Link." ScienceDaily. www.sciencedaily.com/releases/2002/09/020903070858.htm (accessed October 20, 2014).

Share This



More Earth & Climate News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

3BL Media (Oct. 20, 2014) Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-fuel Impala Video provided by 3BL
Powered by NewsLook.com
White Rhino's Death In Kenya Means Just 6 Are Left

White Rhino's Death In Kenya Means Just 6 Are Left

Newsy (Oct. 20, 2014) Suni, a rare northern white rhino at Ol Pejeta Conservancy, died Friday. This, as many media have pointed out, leaves people fearing extinction. Video provided by Newsy
Powered by NewsLook.com
Beijing Marathon Runners Brave Hazardous Air Pollution

Beijing Marathon Runners Brave Hazardous Air Pollution

AFP (Oct. 19, 2014) Tens of thousands of runners battled thick smog at the Beijing Marathon on Sunday, with some donning masks as the levels of PM2.5 small pollutant particles soared to 16 times the maximum recommended level. Duration: 00:54 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


Plants & Animals

Earth & Climate

Fossils & Ruins

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