[quote Flyonawalk]@NeverDropYourMoonCup That is a good point. Is it the same strain of TB that infects humans?[/quote]
Just noticed this.
There are several strains that infect humans (and other animals)
Bovine (bTB) - Mycobacterium bovis - is one - and was the strain used to develop the BCG vaccine. Named for cattle, but all infects Bagers, deer, possum,
M. africanum is believed to be a human strain, but has also been found in other animals, such as Chimpanzees, so that's suspected to be something we've given to them, not the other way around.
M. canetti is possibly an ancestor bacteria but has only been identified since the late 60s and is very rare, so they aren't sure either way if that's be passed across the species barrier from animals or to animals.
M. caprae - from goats, sheep, antelopes, cattle, pigs, deer, wild boar and bison. Infects humans.
M. microti - field voles and other small rodents, as well as cats and llamas. Infects humans.
M. pinnipedi - seals. Have found a very closely related one in human remains. So it infected humans at least at one point.
M. orygis - oryx, rhinos, cattle, Rhesus Monkeys, humans.
There are other versions - but seeing as those listed all infect animals and only one doesn't have a record of doing so, going by my perfunctory googling - it really, really isn't something that can be assumed to ever be anything but a very real risk.
TB's a bastard. Especially as it can lurk in the body for decades just as easily as attacking visibly straight away, just waiting for the right circumstances to make its presence known.