Rare but possible:
Can bovine TB spread to humans?
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The simple answer is 'yes', but it is not very likely. Currently less than 1% of cases of TB in humans are caused by bTB and a significant proportion of these are in humans over 70 years old (reactivation of ancient infections) or immigrants from developing countries. With modern living conditions, better sanitation and the widespread use of pasteurisation/cooking, the risk is extremely low. The Health Protection Agency has confirmed that the risk to humans is negligible (so small or unimportant as to be not worth considering). It is interesting to note that around 60% of the human population are in areas where bovine TB is either only partially controlled or not controlled at all (ref 1).
There are three ways humans can get bovine tuberculosis:
* by breathing or inhaling air contaminated with the bacteria after an infected animal or infected person coughs or sneezes very close by. However, cattle owners and TB testers on farms take no precautions when in contact with cattle, wear no masks and do not contract the disease. They do, however, suffer physical injuries because of the high health and safety risks involved with cattle handling* by drinking unpasteurised milk from an infected cow or eating raw or undercooked meat from an infected animal.* by handling infected meat in the dressing and processing of animal carcasses, especially if hands aren't washed carefully prior to consuming food. There is very little risk that an individual would contract bovine tuberculosis by this method borne out by the fact that even abattoir workers and vets very rarely contract the disease.
That's from here:
http://www.bovinetb.co.uk/article.php?article_id=24