“Bovine TB is probably not passed by direct contact between species, but rather indirectly through contaminated pasture … badgers like to hang around earthworm-rich cattle pasture, but not the cattle themselves. Badger faeces and sputum — and cow pats from infected cattle — might be the carriers of M. bovis in farms.” (http://www.nature.com/news/scientists-track-badger-cow-encounters-to-understand-cattle-tb-1.20378)
Just out of curiosity, what is the motivation for culling badgers? Obviously scientific and economic justifications are long since debunked, so is it simply to mollify the ‘shoot the scapegoat’ brigade? Is it time to wean them off the infected badger sputum?