Randi Rhodes Forums

Disconcerting.

http://www.bbc.co.uk/news/science-environment-19055961


New flu virus found in seals concerns scientists
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The H3N8 flu has been associated with the deaths of harbour seals in New England last year.

Researchers say the virus may have evolved from a type that had been circulating in birds.

They say the discovery highlights the potential for pandemic flu to emerge from unexpected sources.
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Researchers were puzzled by the mysterious deaths from pneumonia of 162 harbour seals around the coast of New England last year.
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Autopsies on five of the marine mammals indicate that they died from a type of H3N8 influenza A virus that is closely related to a strain circulating in North American birds since 2002.

One of authors of the research paper is Prof Ian Lipkin, from Columbia University in the US. He is a celebrated virus hunter who in the past has helped identify West Nile virus and Severe Acute Respiratory Syndrome (SARS). He told the BBC that finding this flu virus in seals was an interesting "new jump".

"It's something that's been circulating for a while in birds, but we've not had this sort of die off relating to this virus in the past. As we've looked at it in some detail, we've found there have been mutations in this virus which enable it to bind to both bird receptors for flu as well as mammalian receptors for flu."
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There is a concern that we have a new mammalian-transmissible virus to which humans haven't yet been exposed. It's a combination we haven't seen in disease before."

One of the big concerns for Prof Lipkin is that seals are acting as a mixing vessel for viruses in a way that has previously happened in pigs.

"What was interesting about this is the seals are acting as an intermediary - they have receptors for both bird flu viruses and well as mammalian flu viruses, so you have a host in which this virus can adapt, evolve and become more mammalian in phenotype and more capable of causing disease in mammals.

"That's when we really need to be concerned that it's going to be spreading into humans."
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