Featured Research

from universities, journals, and other organizations

Study Finds Key Distinction Between Outbreaks That Die Out And Epidemics

Date:
February 22, 2006
Source:
University of Chicago Press Journals
Summary:
In an important study forthcoming in the March 2006 issue of the American Naturalist, biologists from Yale University, University of Florida, and Dartmouth University explore the dynamics of pathogen survival and shed new light on a longstanding mystery: why some infectious diseases are limited to small outbreaks and others become full-blown epidemics.

In an important study forthcoming in the March 2006 issue of the American Naturalist, biologists from Yale University, University of Florida, and Dartmouth College explore the dynamics of pathogen survival and shed new light on a longstanding mystery: why some infectious diseases are limited to small outbreaks and others become full-blown epidemics.

"The capacity of a virus to propagate upon a novel host apparently is conditional on the recent experience of preceding generations," explain John J. Dennehy (Yale University), Nicholas A. Friedenberg (Dartmouth College), Robert D. Holt (University of Florida), and Paul E. Turner (Yale University). "This is intrinsically interesting, suggesting a kind of complexity in pathogen population dynamics that has not been widely regarded."

The researchers observed viral populations on host bacteria, specifically situations where virus populations were sustained on the original hosts, but went extinct on the new hosts. Observing transmission rates, they found that viruses previously reared on an original host showed greater productivity on the new host than viruses previously reared on the new host.

"In this critical region, periodic exposure to native hosts allowed the viruses to survive on novel hosts, an unanticipated result," explain the authors.

The researchers infer that the mechanism behind this phenomenon may be the "host-legacy" effect. If this is the case, according to the authors, the total viral population experiencing the new environment is greater than previously expected, allowing for increased chances of adaptive evolution to the new host.

###

Founded in 1867, The American Naturalist is one of the world's most renowned, peer-reviewed publications in ecology, evolution, and population and integrative biology research. AN emphasizes sophisticated methodologies and innovative theoretical syntheses--all in an effort to advance the knowledge of organic evolution and other broad biological principles.

Dennehy, John J., Nicholas A. Friedenberg, Robert D. Holt, and Paul E. Turner. "Viral ecology and the maintenance of novel host use," The American Naturalist 167:3.


Story Source:

The above story is based on materials provided by University of Chicago Press Journals. Note: Materials may be edited for content and length.


Cite This Page:

University of Chicago Press Journals. "Study Finds Key Distinction Between Outbreaks That Die Out And Epidemics." ScienceDaily. ScienceDaily, 22 February 2006. <www.sciencedaily.com/releases/2006/02/060222175448.htm>.
University of Chicago Press Journals. (2006, February 22). Study Finds Key Distinction Between Outbreaks That Die Out And Epidemics. ScienceDaily. Retrieved September 30, 2014 from www.sciencedaily.com/releases/2006/02/060222175448.htm
University of Chicago Press Journals. "Study Finds Key Distinction Between Outbreaks That Die Out And Epidemics." ScienceDaily. www.sciencedaily.com/releases/2006/02/060222175448.htm (accessed September 30, 2014).

Share This



More Plants & Animals News

Tuesday, September 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

California University Designs Sustainable Winery

California University Designs Sustainable Winery

Reuters - US Online Video (Sep. 27, 2014) Amid California's worst drought in decades, scientists at UC Davis design a sustainable winery that includes a water recycling system. Vanessa Johnston reports. Video provided by Reuters
Powered by NewsLook.com
Argentina Worries Over Decline of Soybean Prices

Argentina Worries Over Decline of Soybean Prices

AFP (Sep. 27, 2014) The drop in price of soy on the international market is a cause for concern in Argentina, as soybean exports are a major source of income for Latin America's third largest economy. Duration: 01:10 Video provided by AFP
Powered by NewsLook.com
Mama Bear, Cubs Hang out in California Backyard

Mama Bear, Cubs Hang out in California Backyard

Reuters - US Online Video (Sep. 27, 2014) A mama bear and her two cubs climb trees, wrestle and take naps in the backyard of a Monrovia, California home. Vanessa Johnston reports. Video provided by Reuters
Powered by NewsLook.com
'Crazy' Climate Forces Colombian Farmers to Adapt

'Crazy' Climate Forces Colombian Farmers to Adapt

AFP (Sep. 26, 2014) Once upon a time, farming was a blissfully low-tech business on Colombia's northern plains. Duration: 02:05 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