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:6/26/2016)... ... June 26, 2016 , ... Many women are confused ... endometriosis. These women need a treatment plan to not only alleviate symptoms and ... help for preservation of fertility and ultimately achieving a pregnancy. The specialists at ...
(Date:6/25/2016)... ... 2016 , ... "With 30 hand-drawn hand gesture animations, FCPX users can easily ... of Pixel Film Studios. , ProHand Cartoon’s package transforms over 1,300 hand-drawn pictures ... . Simply select a ProHand generator and drag it above media or text in ...
(Date:6/25/2016)... ... June 25, 2016 , ... On Friday, June 10, Van Mitchell, Secretary of ... award to iHire in recognition of their exemplary accomplishments in worksite health promotion. , ... Workplace Health & Wellness Symposium at the BWI Marriott in Linthicum Heights. iHire was ...
(Date:6/24/2016)... ... , ... June 19, 2016 is World Sickle Cell Observance Day. In an ... of holistic treatments, Serenity Recovery Center of Marne, Michigan, has issued a ... Cell Disease (SCD) is a disorder of the red blood cells, which can cause ...
(Date:6/24/2016)... CA (PRWEB) , ... June 24, 2016 , ... ... is now offering micro-osteoperforation for accelerated orthodontic treatment. Dr. Cheng has extensive experience ... Damon brackets , AcceleDent, and accelerated osteogenic orthodontics. , Micro-osteoperforation is ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... -- Guerbet announced today that it has been named a ... One of 12 suppliers to receive the ... of Premier members through exceptional local customer service and ... lower costs. "We ... customer service from Premier," says Massimo Carrara , ...
(Date:6/23/2016)... June 23, 2016 Research and ... Procedure Volumes: Global Analysis (United States, China, Japan, Brazil, ... report to their offering. ... for healthcare business planners, provides surgical procedure volume data ... trends with an in-depth analysis of growth drivers and ...
(Date:6/23/2016)... The Biotechnology industry might still ... great opportunities to investors. Stock-Callers.com assesses the recent performances ... XON ), Vertex Pharmaceuticals Inc. (NASDAQ: ... ARNA ), and Regeneron Pharmaceuticals Inc. (NASDAQ: ... your complimentary trade alerts at: http://stock-callers.com/registration ...
Breaking Medicine Technology: