The truth about bovines, badgers and the spread of TB

11 November 2012 | The Observer | Alice Roberts

“Convention held that humans had caught tuberculosis from cattle – but the DNA record tells a different story …

…In 1999, an early genetic study cast doubt on the ancestor-descendant relationship between the bovine and human forms of TB. More studies confirmed the new story. If anything, the ancestor of both human and bovine forms must have been closer to the human form – with its larger chromosome. It’s even possible that cows caught TB from us (or at least, from another mammal that had caught “human” TB).

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