Keeping disease out of the farm (II)

This is the second in the series of John Gadd’s ‘Keeping disease out of the farm’. Last issue covered the 2 most common sources which weaken any farm’s defences – other pigs and ‘induction, quarantining and feedback’. Now for some other vectors ?(a ‘vector’ in this case is any carrier of disease or infection). Most of the following are well-known but there are a few new observations. Any vehicles! From the vet’s car, farm workers cars or bikes, all types of delive