News / Health

Herpes Virus Follows Human Migration Patterns

The virus that causes herpes simplex has plagued man for a long time. So long, in fact, that researchers were able to sequence its genetic code to confirm that it follows the “out-of-Africa” pattern of human migration. (<a href="http://commons.wikimedia.org/wiki/File:Herpes_labialis.jpg">Creative Commons</a>)The virus that causes herpes simplex has plagued man for a long time. So long, in fact, that researchers were able to sequence its genetic code to confirm that it follows the “out-of-Africa” pattern of human migration. (Creative Commons)
x
The virus that causes herpes simplex has plagued man for a long time. So long, in fact, that researchers were able to sequence its genetic code to confirm that it follows the “out-of-Africa” pattern of human migration. (<a href="http://commons.wikimedia.org/wiki/File:Herpes_labialis.jpg">Creative Commons</a>)
The virus that causes herpes simplex has plagued man for a long time. So long, in fact, that researchers were able to sequence its genetic code to confirm that it follows the “out-of-Africa” pattern of human migration. (Creative Commons)

Related Articles

Oxygen, Life May have Appeared Earlier than Thought

Researchers find evidence of oxygen in ancient S. African soils

Neanderthals May Have Dined on Animal Stomachs

Eating stomach contents is still practiced today in parts of Greenland and Australia
VOA News
The virus that causes herpes simplex has plagued man for a long time. So long, in fact, that researchers were able to sequence its genetic code to confirm that it follows the “out-of-Africa” pattern of human migration.

The herpes simplex virus type 1 (HSV-1), usually causes nothing more severe than cold sores around the mouth, but it is very common with some 90 percent of American adults having been exposed.

Researchers compared 31 strains of HSV-1 collected in North America, Europe, Africa and Asia, and "the result was fairly stunning," said Curtis Brandt, a professor of medical microbiology and ophthalmology at University of Wisconsin-Madison.

"The viral strains sort exactly as you would predict based on sequencing of human genomes. We found that all of the African isolates cluster together, all of the virus from the Far East, China, Japan, Korea, clustered together, all the viruses in Europe and America, with one exception, clustered together," he said. "What we found follows exactly what the anthropologists have told us, and the molecular geneticists who have analyzed the human genome have told us, about where humans originated and how they spread across the planet."

Studies of human genomes have shown that our ancestors emerged from Africa roughly 150,000 to 200,000 years ago, and then spread eastward toward Asia, and westward toward Europe.

The researchers broke the HSV-1 genome into 26 pieces, made family trees for each piece and then combined each of the trees into one network tree of the whole genome. This paralleled existing analyses of human migration.

The new analysis could even detect some intricacies of migration. Every HSV-1 sample from the United States except one matched the European strains, but one strain that was isolated in Texas looked Asian. Either the sample had come from someone who had travelled from the Far East, or it came from a Native American whose ancestors crossed the "land bridge" across the Bering Strait roughly 15,000 years ago.

"We found support for the land bridge hypothesis because the date of divergence from its most recent Asian ancestor was about 15,000 years ago. Brandt said. "The dates match, so we postulate that this was an Amerindian virus."

Herpes simplex virus type 1 was an ideal virus for the study because it is easy to collect, usually not lethal, and able to form lifelong latent infections. Because HSV-1 is spread by close contact, kissing or saliva, it tends to run in families. "You can think of this as a kind of external genome," Brandt said.

The results were published in the journal PLOS ONE.

You May Like

US Investors Eye IPO for China's Alibaba

E-commerce giant handled 80 percent of China's online business last year, logging more Internet transactions than US-based Amazon.com and eBay combined More

Video Uneasy Calm Settles Over Israel, Gaza Strip

As cease-fire begins, Palestinians celebrate in streets; Israelis remain wary More

Video Chinese Doctors Use 3-D Spinal Implant

In treatment of a 12-year-old boy Chinese doctors used a 3-D printer and special software to create an exact replica of vertebra More

This forum has been closed.
Comments
     
There are no comments in this forum. Be first and add one

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Chinese Doctors Use 3-D Spinal Implanti
X
August 27, 2014 4:53 PM
A Chinese boy suffering from a debilitating bone disease has become the first patient with a part of his spine created in a three-dimensional printer. Doctors say he will soon regain normal mobility. VOA’s George Putic reports.
Video

Video Chinese Doctors Use 3-D Spinal Implant

A Chinese boy suffering from a debilitating bone disease has become the first patient with a part of his spine created in a three-dimensional printer. Doctors say he will soon regain normal mobility. VOA’s George Putic reports.
Video

Video Uneasy Calm Settles Over Israel, Gaza Strip

Israel and the Gaza Strip have been calm since a cease-fire set in Tuesday evening, ending seven weeks of hostilities. Hamas, which controls Gaza, declared victory. Israelis were more wart. VOA’s Scott Bobb reports from Jerusalem.
Video

Video India’s Leprosy Battle Stymied by Continuing Stigma

Medical advancements in the treatment of leprosy have greatly diminished its impact around the world, largely eliminating the disease from most countries. India made great strides in combating leprosy, but still accounts for a majority of the world’s new cases each year, and the number of newly infected Indians is rising - more than 130,000 recorded last year. Doctors there say the problem has more to do with society than science. VOA News reports from Kolkata.
Video

Video Northern California Quake: No Way to Know When Next One Will Hit

A magnitude 6.0 earthquake rocked northern California’s Napa Valley on Sunday. Roads twisted and water mains burst. It was the wine country’s most severe quake in 15 years, and while hospitals treated many people, no one was killed. Arash Arabasadi has more from Washington on what the future may hold for those residents living on a fault line.
Video

Video Scientists Unlock Mystery of Bird Flocks

How can flocks of birds, schools of fish or herds of antelope suddenly change direction -- all the individuals adjusting their movement in concert, at seemingly the same time? British researchers now have some insights into this behavior, which has puzzled scientists for a long time. VOA's George Putic has more.
Video

Video Ukraine: Captured Troops Proof of Russian Role in Separatist Fight

Ukrainian officials say they have captured Russian soldiers on Ukrainian territory -- the latest accusation of Moscow's involvement in the conflict in eastern Ukraine. VOA's Gabe Joselow reports from the Ukrainian side of the battle, where soldiers are convinced of Russia's role.
Video

Video Rubber May Soon Come From Dandelions

Synthetic rubber has been around for more than a century, but quality tires for cars, trucks and aircraft still need up to 40 percent or more natural rubber content. As the source of natural rubber, the rubber tree, is prone to disease and can be affected by bad weather. So scientists are looking for replacements. And as VOA’s George Putic reports, they may have found one in a ubiquitous weed.
Video

Video Jewish Life in Argentina Reflected in Yiddish Tango

Jewish people from across Europe and Russia have been immigrating to Argentina for hundreds of years. They brought with them dance music that were eventually mixed with Argentine tango. The result is Yiddish tango -- a fusion of melodies and cultural experiences that is still evolving today. Elizabeth Lee reports from the Skirball Cultural Center in Los Angeles, where one band is bringing Yiddish tango to an American audience.

AppleAndroid