The milk that caused my brother's illness was unpasteurised 'raw' milk
Defra, UK - Animal health & welfare - TB in cattle
fact file bovine TB
I recall that in the early 50s herds began to be vaccinated and farmers declared their herds to be TT (tuberculine tested)
I haven't tried to buy raw milk for 'donkeys years' -dont know whether you can still buy it. Like you I miss the cream top - but perhaps its safer that way.