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:11/23/2018)... (PRWEB) , ... November 23, 2018 , ... ... Dr. Emeran Mayer, MD, Executive Director of the G. Oppenheimer Center for Neurobiology ... leading scientists and doctors from around the world, Dr. Mayer will bring to ...
(Date:11/20/2018)... ... November 20, 2018 , ... Thanks to its long-standing ... position on the ID reader market, as the company now proposes a full range ... control, etc. Elyctis ID reader range can be used by professionals either in a ...
(Date:11/16/2018)... ... November 16, 2018 , ... ... awarded the International Bottled Water Association’s (IBWA’s) IBWA/Shayron Barnes-Selby Advocacy Award at the ... Award, named “The Selby” after longtime IBWA contributor Shayron Barnes-Selby, is awarded to ...
Breaking Biology News(10 mins):
(Date:11/26/2018)... , ... November 26, 2018 , ... ... backed by Siemens Healthineers and Omphalos Venture Partners (Virtual Radiologic founders) among other ... Meeting from Nov. 25-29 at McCormick Place in Chicago. The company is proud ...
(Date:11/20/2018)... ... November 20, 2018 , ... Each year Forbes receives thousands of nominations ... highlights outstanding performance by individuals under 30 years of age. The Forbes 30 Under ... Sports and Entertainment to Venture Capital and Science. , In 2017, Visikol CEO ...
(Date:11/13/2018)... ... November 13, 2018 , ... Renowned Honolulu veterinarian, Dr. ... the island of Kauai. Dr. Leadbeater, of Kahala Pet Hospital on ... Recently, he began traveling to the island of Kauai on an almost weekly ...
(Date:11/13/2018)... ... November 13, 2018 , ... Aditya Humad, ... market last week that asserts it is still trending upward with growing valuations ... Humad’s analysis describes market consolidation, pricing pressure and increased competition as reasons often ...
Breaking Biology Technology:
Cached News: