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Bovine TB and badger control

farming industry should climb aboard. The objective should be to eradicate the disease, not suppress it by vaccination. Furthermore the scientific basis of the badger BCG vaccine, which only has a Limited Marketing Authority, is highly questionable. Laboratory experiments carried out at AHVLA showed that all vaccinated animals became infected with M bovis following experimental challenge with the organism (Lesellier and others 2011). And in spite of indirect serological evidence offered by Chambers and others (2014) there is no substantial evidence that it will work in the field, which is presumably what led the Chief Scientific Adviser to Defra and the Chief Veterinary Officer to declare in a letter to The Independent in 2012 that the vaccine could not be expected to protect infected badgers in the field (Boyd and Gibbens 2012). We raise a further caveat with the vaccine – that of safety to the target species. We note that postmortem examinations were not carried out as part of the vaccine safety assessment (Lesellier and others 2006). A delayed type 4 pulmonary hypersensitivity reaction particularly in infected animals cannot therefore be ruled out.