Murgen said:The "atypical" cases in the US were determined in the UK, after several months of further testing.
Determining "Atypical" is pretty easy. If it tests positive with Western Blot and the Bio-Rad and negative with IHC.
Well..........that's all there are to it.
The holes/lesions/vacuoles just ain't there to see.
Just detect the PrPsc themselves.