ESPN got their hands on the levels for the 5 soccer players
http://www.record.com.mx/verano-tric...-seleccionados
See also my reply just above this post. An important question arises: did they all eat the same meat? If so, the fact that one player had a level 3-7x that of the others is suspicious. OTOH, if he ate a different sample of meat, it's suspicious that there were two independent sources of meat this heavily contaminated.
The other four values are fairly close to each other, with differences certainly explainable in terms of different amounts of meat eaten as well as different kinetics. But they could also all be on a similar CB doping regimen. The values are high enough so that they could result from fairly recent administration of CB.
Here again is the link to an old but useful study on the pharmacokinetics of CB in humans and some other animals:
http://ci.nii.ac.jp/els/11000363798...der_no=&ppv_type=0&lang_sw=&no=1308256813&cp=
They note, for example, that a single dose of 40 ug was followed by excretion in the urine over twenty-four hours of about 5 ug. Assuming about a liter of urine passed during this time, the average concentration would be 5 ng/ml. Levels would be perhaps 2-3 times higher if this dose were taken daily for several days, and of course higher still if larger doses were used.
But after 2-3 days, the values fall off markedly. So all the reported values for the soccer players could have resulted from CB doping, followed by termination several days before the tests. Assuming they all knew they could get tested on a certain day of the game (?), they might all plan to stop taking the CB at the same time, to allow it to clear, and this could account for why, in four of the cases, the values are similar. So the similarity, for these four, is not necessarily very good evidence of meat contamination, but it does support their case, whereas the one with the very high value may have a problem.
So how relevant is this for Bert? In terms of the psychological or public perception angle, I think it helps him a lot. Here are five athletes with levels more than ten times higher than his. If they get off, it will appear to a lot of people that he should.
Scientifically, though, his major problem remains the source of meat. Unless he can demonstrate that contaminated meat really is a problem in Spain, I don't see how events in Mexico help him. The Mexican public health dept. claimed that contaminated meat is extremely rare there, but numerous studies don't back up that claim. AFAIK, there are no such studies in Spain. At the end of the day, the location of the meat source is far more important than the level of CB detected in the urine.