Contador tests positive for banned substance

[Norse]

So, if the team ate the supposedly tainted meat, and this drug stays in the body for a long time, shouldn't some of his teammates have tested positive for the same drug during the race? Were none of them tested for the rest of the race?

I thought I read that Contador asked who else on the team was tested that day and the response was, only Vino, and Contador said something like "Great, he's the only one who didn't eat the meat."