HOME >> BIOLOGY >> NEWS
Study finds key distinction between outbreaks that die out and 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.


'"/>

Contact: Suzanne Wu
swu@press.uchicago.edu
773-834-0386
University of Chicago Press Journals
21-Feb-2006


Page: 1

Related biology news :

1. Study begins to reveal clues to the cause and progression of sepsis
2. Study finds gender differences in renal and other genes contributing to blood pressure
3. Study suggests estrogen deficiency can lead to obesity-induced high blood pressure after menopause
4. Study: Sticking to the sand might not be such good, clean fun for beachgoers
5. Study points to new way to predict death risk from torn aorta
6. Study identifies new gene therapy tools for inherited blindness
7. Study finds contaminated water reaching Floridas offshore keys
8. Study sheds light on why humans walk on two legs
9. Study explains how pathogens evolve to escape detection
10. Study finds hereditary link to premenstrual depression
11. Study identifies energy efficiency as reason for evolution of upright walking

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/5/2019)... (PRWEB) , ... March 05, 2019 , ... Join this ... how a metadata-driven approach will help data analysts and bioinformaticians focus on data analysis ... unify data that can come from different source systems. Some sources of data include:, ...
(Date:2/27/2019)... ... ... Circulomics is launching the Short Read Eliminator Kit to perform ... , This kit enhances long-read sequencing read lengths by using size selective precipitation ... and recovered with high efficiency. Short DNA up to 25 kb in length are ...
(Date:2/22/2019)... ... 2019 , ... Clean label food is not just another passing trend in ... It is quite common to spot consumers running their index finger across the back ... this label scrutiny. , More than ever, meat and poultry producers are working ...
Breaking Biology News(10 mins):
(Date:3/14/2019)... ... 14, 2019 , ... ON NOVEMBER 27, 2018, Nova Oculus ... Machine Canada Inc., had been given approval to begin a clinical patient trial ... (AMD). , The previous month, the medical devices bureau of Health Canada had ...
(Date:3/14/2019)... ... March 14, 2019 , ... ... standard solution for preclinical research organizations. It is a low code, GDPR/21 ... systems and facilities, innovative technology-driven automated data capture and seamless data and ...
(Date:3/11/2019)... ... March 11, 2019 , ... In this live webinar, the featured speakers will ... efficiency and experience. Participants will learn how to use the information they have from ... the simple or complex randomization scheme is properly designed and set up to ensure ...
(Date:3/9/2019)... ... March 08, 2019 , ... ... announced the release of their Best Online Master's in Biotechnology Programs for ... curriculum quality, program flexibility, affordability, and graduate outcomes. , In addition to ...
Breaking Biology Technology:
Cached News: