May 06, 2014 07:27 AM
WASHINGTON: A new kind of bird flu has been detected for the first time in Adelie penguins in Antarctica, though the virus does not seem to make them sick, researchers said Tuesday.
The virus is unlike any other avian flu known to science, said the report in mBio, a journal of the American Society for Microbiology.
"It raises a lot of unanswered questions," said study author Aeron Hurt, senior research scientist at the World Health Organization Collaborating Centre for Reference and Research on Influenza in Melbourne, Australia.
The findings show that "avian influenza viruses can get down to Antarctica and be maintained in penguin populations," he said.
The study is the first to report on live avian influenza virus in penguins, though previous research has found evidence of influenza antibodies in penguin blood.
But it remains unclear how often various strains of bird flu are introduced into Antarctica, whether the deadliest types could make it there, and which animals or ecosystems allow the virus to survive.
Hurt and colleagues collected samples from some 300 Adelie penguins at Admiralty Bay and Rada Covadonga during January and February 2013.
They found live, infectious avian influenza virus in eight samples, or nearly three percent of the birds. The penguins did not appear to be sick.
All the samples were found to be H11N2 influenza viruses that were highly similar to each other.