January 21, 2014 |
A rapidly mutating virus has leaped from plants to honeybees, where it is reproducing and contributing to the collapse of colonies vital to the multibillion-dollar agricultural industry, according to a new study. Tobacco ringspot virus, a pollen-borne pathogen that causes blight in soy crops, was found during routine screening of commercial honeybees at a U.S. Department of Agriculture laboratory, where further study revealed the RNA virus was replicating inside its Apis mellifera hosts and spreading to mites that travel from bee to bee, according to the study published online Tuesday in the journal mBio.
January 10, 2014 |
"Helix," which begins Friday on Syfy, arrives under the flag of executive producer Ronald D. Moore, the re-creator of "Battlestar Galactica. " It's a step back for the network toward Moore's dark and deep drama from the semi-comical fantasies, C-movies and fairy-tale variations that have defined its slate of late; that is to say, it's a step forward. And if it doesn't match "Battlestar" for ambition or poetry or sparkling dialogue - to judge by the three hours available for review - it's well-made, solidly scary and disturbing all the same.
January 9, 2014 |
An antibody and toxin mix has successfully detected and killed HIV-infected cells lurking in the organs and bone marrow of mice that were altered to have a human immune system. The results, reported Thursday in the online journal PLOS Pathogens, offer conceptual proof that a reservoir of HIV-infected cells in organs can sought out and destroyed, a scenario that would potentially end the stalemate between the virus and antiretroviral drug therapies. The altered mice, developed about eight years ago, can be infected by the human immunodeficiency virus in an identical manner to humans; they exhibit the same viremia and respond the same way to current antiretroviral drug therapy, but do not come down with AIDS, according to the study.
December 19, 2013 |
A mosquito-borne virus usually restricted to Africa and Asia has been detected for the first time in the Western Hemisphere, with 10 confirmed cases on the French side of the Caribbean island of St. Martin, U.S. authorities have warned. With the winter travel season in full swing through the holidays, the U.S. Centers for Disease Control and Prevention issued a travel advisory for those headed to the tourist playgrounds. The chikungunya virus in spread by the bite of infected mosquitoes and can cause " debilitating illness , most often characterized by fever, headache, fatigue, nausea, vomiting, muscle pain, rash and joint pain," the CDC said on its website.
December 19, 2013 |
Scientists say they have discovered a key process by which the AIDS virus kills key immune cells: It triggers a preprogrammed self-destruct sequence within the cell that is intended to alert fellow immune cells of a crisis. In papers published simultaneously Thursday in Science and Nature , researchers at the Gladstone Institutes and UC San Francisco wrote that they had not only discovered this little-understood process, but had also identified an existing drug that may halt it. "Our studies have investigated and identified the root cause of AIDS," said Gilad Doitsh, a coauthor of both studies and a Gladstone virologist.
November 26, 2013 |
The 2009 H1N1 "swine flu" epidemic killed up to 203,000 people across the globe -- a death toll 10 times greater than initially estimated by the World Health Organization, researchers say. In a study published Tuesday in the journal Plos Medicine, epidemiologists used data on respiratory deaths in 20 nations to calculate a global mortality rate for the pandemic. Prior to this research, the WHO counted just 18,631 lab-confirmed cases of H1N1, a viral infection of the airways.