Bovine Tuberculosis

Lord Dubs Excerpts

Tuesday 26th November 2013 Lords Chamber

Asked by

[Lord Dubs]

To ask Her Majesty’s Government whether they have any evidence about the impact of artificial insemination of cattle on the spread of bovine tuberculosis.

[The Parliamentary Under-Secretary of State, Department for Environment, Food and Rural Affairs (Lord De Mauley) (Con)]

My Lords, there is, indeed, a debate among veterinarians on this matter. While the evidence does not provide a definitive answer, it is important to note that TB has been eradicated from Scotland and many other countries despite the use of artificial insemination and, furthermore, that bovine TB was already endemic throughout Great Britain well before the widespread adoption of AI in the 1950s.

[Lord Dubs (Lab)]

My Lords, is the Minister aware that I got the idea for this Question through talking to a local farmer in my valley in Cumbria? He told me that, although there were many badgers in the valley, there was no bovine TB at all, and that local farmers did not use artificial insemination. Given that there is at least some scientific basis for this, would it be right to pursue this rather than going for a badger cull for which the scientific evidence is doubtful?

[Lord De Mauley]

The noble Lord will not be surprised to hear that I do not agree with the last thing he said, but he might be interested to know that bull pedigree and TB data analysis of Holstein Friesian bulls, carried out by the Roslin Institute for Defra, have shown clear evidence of genetic variation to bovine TB susceptibility with a moderate heritability of 18%. However, no link was found in those studies between selection of bulls for milk yield and greater susceptibility to bovine TB. The study authors went on to conclude that,

“selection for milk yield is unlikely to have contributed to the current”,

bovine TB epidemic in Great Britain.