Navigation Links
Study Finds the Spread of Rabies in North American Raccoons

A new study has detailed how initial demographic, ecological and genetic processes simultaneously shaped the spread of rabies virus in North American raccoons.

A raccoon is a mammal native to the Americas.

Although raccoons are common throughout North America, their impact as a rabies host before the 1970s was limited to the southeastern United States, particularly Florida. However, this situation changed dramatically in 1977 when a raccoon-specific rabies virus variant (RRV) was detected in West Virginia. The RRV later spread quickly along the mid-Atlantic coast, and by 1999 infiltrated thousands of square kilometers.

The study was conducted by a team of researchers including Leslie Real at at Emory University.

As part of the study, researchers analysed 30 years of data of the particular outbreak, which began in the mid-1970s. The Centres for Disease Control and Prevention (CDC) had been stockpiling viral samples from the outbreak since 1982, giving scientists a treasure trove of genetic data ripe for analysis.

"Together these data offer a rare chance to examine how the demographic and spatial processes of spread and population expansion over 30 years have shaped viral evolution on a geographic scale. Landscape features, such as rivers and mountains, can have a pronounced effect on the rate of rabies' spread and may therefore affect viral dynamics on a large scale," Real said.

Researchers found that that because mountain ranges make for a poor raccoon habitat especially at higher elevations, raccoons did not cross the Appalachian mountain chain during the first part of the outbreak, which clearly limited the virus's westward expansion. The Allegheny Mountains appear to have slowed the virus's expansion to the north.

The study area ranged from North Carolina to Vermont, as far east as Chesapeake Bay, and westward into Tennessee and Ohio.

"These results pr ovide important insights into the geographic scale of rabies persistence and will be increasingly important in understanding the epidemiology of rabies and other emerging zoonotic diseases, those diseases that can be transmitted between animals and people, in a geographic context. We can then use these insights to predict where and when zoonotic disease outbreaks will occur so we can target surveillance and intervention," Real said.

"Our study demonstrates the combined evolutionary and population dynamic processes characterizing the spread of a pathogen after its introduction into a susceptible host population," Real said.

During invasion, emerging pathogens, such as rabies, ebola and hantavirus, undergo rapid evolution while expanding their numbers and geographic range. Yet, it is difficult to demonstrate how these processes interact.

The findings of the study were published online in the Proceedings of The National Academy of Sciences.


'"/>




Related medicine news :

1. Tomato Sauce reduces Cancer Risk- Study
2. Study on obesity and heart failure
3. National Lung Study in the process
4. Study casts doubt on keyboard ills
5. Study reveals how stress can make you sick
6. Study reveals how stress can make you sick
7. Study supports vegetable diet
8. Study to look at early surgery to treat epilepsy
9. Its Never Too Late to Stop Smoking,Study Finds
10. New Technique to Study Infants Brain.
11. Groundbreaking Study Gives Hope For Patients With Kidney Cancer
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/22/2017)... ... May 22, 2017 , ... Today, Our Urgent Care celebrates ... with a public ribbon cutting ceremony. Since opening over a month ago, Our ... the emergency room. The new Our Urgent Care walk-in clinic is located at ...
(Date:5/22/2017)... ... ... Faithfully following pop culture, people today are forever in pursuit of physical ... programs. It carries on to skin nourished, pampered and nurtured to be soft and ... CDA has found that just like a perfectly cut and polished diamond, that ...
(Date:5/21/2017)... Dallas, Texas (PRWEB) , ... May 19, 2017 ... ... country, is pleased to announce the appointment of James (Jim) Vertino as Chief ... Vertino is a proven, transformational leader who drives innovation and business performance. He ...
(Date:5/21/2017)... (PRWEB) , ... May 21, 2017 , ... ... Conference has brought together a cross-disciplinary group of scholars, policymakers, and activists wanting ... Social Justice, and Equity is the third book from a recent series ...
(Date:5/21/2017)... ... May 21, 2017 , ... Dental visits are often low ... you've seen a dentist, it's time for a dental checkup. The American Dental ... year. , Dental checkups are a relatively easy procedure that involves visually inspecting ...
Breaking Medicine News(10 mins):
(Date:5/12/2017)...  The China and Canada joint tech ... water, energy and detergent, and features a powerful disinfection process. ... washing machine that washes and sanitizes women,s panties or babies, cloth ... ... does not require an external water inlet. ...
(Date:5/10/2017)... MIAMI , May 10, 2017 Global ... in Latin America , published its 2017 ... The ranking is based on extensive data analysis from GHI,s ... world,s largest hospitals database for the region. The GHI database ... , offering more than 130 data points for each ...
(Date:5/10/2017)... Md. , May 10, 2017 CSSi, ... solutions for the clinical research industry, is proud to ... www.CSSiEnroll.com . The new website features both enriched content ... user experience and enhances the company,s already well-established position ... industry. "After many months of hard ...
Breaking Medicine Technology: