cyclingnews.com reports that Iban Mayo's B sample has been retested and found to be EPO positive.', '
What's interesting here is that following the A test positive, the B tests performed in a lab in Gent were "inconclusive". The B samples have now been re-tested at the the French national anti-doping laboratory (LNDD) in Chatenay-Malabry. This lab is the focus of the Landis appeal - as far as I can tell not on the basis that the test results were wrong, but on procedural grounds - so i can see this one run and run. For my views on why EPO tests can be hard to interpret see my posting on EPO and EPO testing.
There are enough procedural uncertainties here that this story is very likely to run and run, particularly if Mayo is suspended or banned as a consequence. It's not good that these cases get prolonged while the protagonists argue the toss over procedural irregularities. Athletes have a capacity to lie over their guilt for a long time before evidence forces them to come clean - see for example the sad story of Birillo.