Defra have updated their advice leaflet on Tuberculosis in Camelids, which may be accessed on this link.
They point out that:
Transmission can occur between animals, from animals to humans, more rarely from humans to animals and between humans.
Transmission is predominantly through exposure to respiratory aerosols from an infectious animal. Camelids have a habit of spitting a mixture of gastric contents and saliva and this could increase the risk of transmission, particularly in the later stages of infection when lesions are present in the lungs and bowel.
In their new missive, and keen on the bio-security angle, Defra also advise that water troughs (and feed?) be offered '3 feet off the ground' to prevent the ingress of badgers.
Aim to make salt and mineral blocks inaccessible to badgers by raising them off the ground. Water troughs should also be raised at least three feet above the ground to prevent badger access..
Filming carried out by Professor Tim Roper of Sussex University showed badgers feeding from cattle troughs set at 4 feet 3 inches off the ground, which as Defra were helpful to point out in answers to our Parliamentary Questions, is too high for cattle (or camelids) to access. Thus to comply with Defra's advice may involve the modification of both camelids and cattle with one of these.