More from the London Times today (thanks  Matt Drudge ):
"...Sophisticated sampling devices were employed which kept the air in
sterile
conditions to avoid any contamination.

  The scientists are now trying to grow the bugs at Cardiff University’s
Centre for Astrobiology and examine their DNA.

  Professor David Lloyd, who led the analysis of the samples, said: “It
may be they are just terrestrial bacteria, but we don’t know how they
could have got up to these heights...”
  http://www.thetimes.co.uk/article/0,,3-2001262143,00.html
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