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:10/13/2017)... ... ... As health professionals work to improve their approach to healthcare, there is a ... filling out a survey; in many cases health professionals and patients are working together ... research on the importance of active engagement with patients and members of the public ...
(Date:10/13/2017)... , ... October 13, 2017 , ... PurhealthRX , ... Oil utilizing Purzorb™ technology. Applying the Purzorb™process to full spectrum CBD oil will revolutionize ... providing a CBD form that can be easily incorporated into liquid products, while reducing ...
(Date:10/13/2017)... (PRWEB) , ... October 13, 2017 , ... Many families ... However, many long-term care insurance companies have a waiver for care if the client ... elimination period, when the family pays for care, is often waived, so the benefits ...
(Date:10/13/2017)... Texas (PRWEB) , ... October 13, 2017 , ... Yisrayl ... this week that explains one of the most popular and least understood books in ... like cryptic and puzzling descriptions that have baffled scholars for centuries. Many have tossed ...
(Date:10/13/2017)... ... October 13, 2017 , ... “America On The Brink”: the Christian history of ... Brink” is the creation of published author, William Nowers. Captain Nowers and his ... veteran, he spent thirty years in the Navy. Following his career as a ...
Breaking Medicine News(10 mins):
(Date:10/12/2017)... , Oct. 12, 2017   Divoti USA ... Jewelry up to the standard of the latest FDA requirements, which ... 2017). Anyone in need of Medical ID jewelry such ... Alert Jewelry are engraved in terms of the new ... Divoti offers ...
(Date:10/11/2017)... 2017  BioPharmX Corporation (NYSE MKT: BPMX) researchers were ... innovative way to use nonlinear optical imaging to confirm ... drugs. A ... show how researchers from BioPharmX and the Wellman Center ... a suite of imaging techniques in what is called ...
(Date:10/11/2017)... Texas , Oct. 11, 2017  True ... services, has amplified its effort during National Breast ... about hereditary cancer risks. ... of Clinical Oncology calculated that more than 10 ... have inherited mutations in BRCA1 or BRCA2 and have ...
Breaking Medicine Technology: