Archive for Laurie Garrett

Homeland

Posted in Ecological resilience, Evolution, Influenza with tags , , , , , , , , on December 16, 2013 by Rob Wallace

BSL-4 WorldA new report shows an increasing global population exposed to the risk of accidents from biosafety laboratories studying some of the world’s most dangerous diseases.

Princeton University post-doc Thomas Van Boeckel and colleagues show the population living within the commuting field of BSL-4 labs increased by a factor of four from 1990 to 2012. The fields encapsulate nearly 2% of the world’s population, but by virtue of infectivity any one escape pathogen may turn epidemic.

The team mapped friction surfaces of the commuting time over which a potentially infected lab worker would carry an infection home. The resulting isochronal belts were used to determine the population within the direct vicinity of each lab.

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A Dangerous Method

Posted in Ecological resilience, Evolution, Influenza with tags , , , , , , , , , , , , on December 28, 2011 by Rob Wallace

There were cameras literally everywhere, in London. So far, he’s managed not to think about them. He remembered Bigend saying they were a symptom of autoimmune disease, the state’s protective mechanisms ‘roiding up into something actively destructive, chronic; watchful eyes, eroding the healthy function of that which they ostensibly protected. –William Gibson (2010)

This summer Ron Fouchier’s lab in the Netherlands conducted an experiment as frightening for its simplicity as for its results. The team produced a human-transmissible version of  highly pathogenic influenza A (H5N1) or bird flu.

Rather than by reverse genetics, wherein a complex round robin of mutations are introduced in an effort to produce a human-specific bird flu, an approach which failed most recently at CDC, the Fouchier group let the virus converge on a solution all on its own. HPAI H5N1 was intranasally inoculated into a group of lab ferrets (whose immune response mimics humans’). Only ten infection generations later the virus went “airborne”—transmitted by respiration—while remaining as deadly as its field cousins (with a 75% case fatality rate). A repeat of the experiment reproduced the result.

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