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

Report: $60 Billion Leaves Africa Illegally Each Year

Report by joint UN and African Union panel says African countries need to take concrete measures to stop illegal money flow from continent each year More

Video Spy Murder Probe Likely to Further Strain British-Russian Relations

Some analysts say Russian Tu-95 bombers were flying near British airspace to warn Britain about an inquest into a murdered Russian spy More

Mugabe Defends Image Amid Controversy at Close of AU Summit

He rejects concerns about how the West might perceive his leadership, saying he's focused on African development 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.
Spy Murder Probe Likely to Further Strain British-Russian Relationsi
X
Henry Ridgwell
January 31, 2015 10:50 PM
Relations between Russia and the West are set to become even more strained amid an inquiry in London into the murder of a former Russian spy. Lawyers at the inquiry accuse Russian President Vladimir Putin of directing a "mafia state." Meanwhile, Royal Air Force fighters intercepted Russian bombers close to British airspace this week, prompting authorities to summon Moscow’s ambassador. Henry Ridgwell reports.
Video

Video Spy Murder Probe Likely to Further Strain British-Russian Relations

Relations between Russia and the West are set to become even more strained amid an inquiry in London into the murder of a former Russian spy. Lawyers at the inquiry accuse Russian President Vladimir Putin of directing a "mafia state." Meanwhile, Royal Air Force fighters intercepted Russian bombers close to British airspace this week, prompting authorities to summon Moscow’s ambassador. Henry Ridgwell reports.
Video

Video Ukrainian Neighborhood Divided Over Conflict

People in eastern Ukraine’s Donetsk and Luhansk districts find themselves squarely in the path of advancing Russian-backed rebels, who want to take back the territory they held at the beginning of the conflict last year. Many local residents are afraid, but others would welcome the change, even when a rebel shell lands in their neighborhood. From the Luhansk district, 15 kilometers from where the Ukrainian government marks the front line, VOA’s Al Pessin reports.
Video

Video Threat of Creeping Lava Has Hawaiians on Edge

Residents of the small town of Pahoa on the Big Island of Hawaii face an advancing threat from the Kilauea volcano. Local residents are keeping a watchful eye on creeping lava. Mike O’Sullivan reports.
Video

Video Jefferson's Library Continues to Impress, 200 Years Later

Two hundred years after the U.S. Congress purchased a huge collection of books belonging to former President Thomas Jefferson, it remains one of America’s greatest literal treasures and has become the centerpiece of Washington’s Library of Congress. VOA’s Deborah Block reports.
Video

Video Egypt's Suez Canal Dreams Tempered by Continued Unrest

Egypt plans to expand the Suez Canal, raising hopes that the end of its economic crisis may be in sight. But some analysts say they expect the project may cost too much and take too long to make life better for everyday Egyptians. VOA's Heather Murdock reports.
Video

Video Pro-Kremlin Youth Group Creatively Promotes 'Patriotic' Propaganda

As Russia's President Vladimir Putin faces international pressure over Ukraine and a failing economy, unofficial domestic groups are rallying to his support. One such youth organization, CET, or Network, uses creative multimedia to appeal to Russia's urban youth with patriotic propaganda. VOA's Daniel Schearf reports.
Video

Video Filmmakers Produce Hand-Painted Documentary on Van Gogh

The troubled life of the famous 19th century Dutch painter Vincent van Gogh has been told through many books and films, but never in the way a group of filmmakers now intends to do. "Loving Vincent " will be the first ever feature-length film made of animated hand-painted images, done in the style of the late artist. VOA’s George Putic reports.
Video

Video Issues or Ethnicity? Question Divides Nigeria

As Nigeria goes to the polls next month, many expect the two top presidential contenders to gain much of their support from constituencies organized along ethnic or religious lines. But are faith and regional blocs really what political power in Nigeria is about? Chris Stein reports.
Video

Video Rock-Consuming Organisms Alter Views of Life Processes

Scientists thought they knew much about how life works, until a discovery more than two decades ago challenged conventional beliefs. Scientists found that there are organisms that breathe rocks. And it is only recently that the scientific community is accepting that there are organisms that could get energy out of rocks. Correspondent Elizabeth Lee reports.
Video

Video Paris Attacks Highlight Global Weapons Black Market

As law enforcement officials piece together how the Paris and Belgian terror cells carried out their recent attacks, questions are being asked about how they obtained military grade assault weapons - which are illegal in the European Union. As VOA's Jeff Swicord reports, experts say there is a very active worldwide black market for these weapons, and criminals and terrorists are buying.
Video

Video Activists Accuse China of Targeting Religious Freedom

The U.S.-based Chinese religious rights group ChinaAid says 2014 was the worst year for religious freedom in China since the end of the Cultural Revolution. As Ye Fan reports, activists say Beijing has been tightening religious controls ever since Chinese leader Xi Jinping came to office. Hu Wei narrates.
Video

Video Theologians Cast Doubt on Morality of Drone Strikes

In 2006, stirred by photos of U.S. soldiers mistreating Iraqi prisoners, a group of American faith leaders and academics launched the National Religious Campaign Against Torture. It played an important role in getting Congress to investigate, and the president to ban, torture. VOA's Jerome Socolovsky reports.

Circumventing Censorship

An Internet Primer for Healthy Web Habits

As surveillance and censoring technologies advance, so, too, do new tools for your computer or mobile device that help protect your privacy and break through Internet censorship.
More

All About America

AppleAndroid