[Maigrey]

But the other question remains: can prions be passed through milk? I know you can acquire CJD by consuming infected brain and spinal matter.

[torstars]

I know you can acquire CJD by consuming infected brain and spinal matter

The highest prion concentrations are in brain and spinal cord. Transmission via transfusion seems likely (based on a fatal vCJD case last week), so the prions do seem to get out and about. I suspect meat from infected cattle would be something to avoid. I would expect milk to have low concentrations, which could mean no disease or longer incubation periods (which are in terms of years, not days or months).