'Blinkers must be removed' said former FG columnist Robert Forster and ex CEO of the National Beef Association, in his opinion piece for FG last week. And 'Farmers must accept that cattle-to-cattle spread of TB is anything but marginal'.
These quotes mirror the message offered by the ISG and Professor John Bourne, who tried so desperately to pin increases in TB incidence in this country on cattle jumping around the place, coughing as they went.
The evidence for Mr. Forster's 'opinion' on the behaviour of this bacteria - it is not a virus - is said to come from the newly appointed TB Eradication Group (T-Beggars) with epidemiological evidence provided by employees of the Public Accounts Committee. Some unidentified Welshmen are also quoted. Unfortunately past peer reviewed work would contradict this confident assertion. Several times, and in three separate areas of the
In the 1970s William Tait arrived in
But CVO reports of the time indicate that Tait's brutal carnage had no effect whatsoever on the level of TB in cattle, which only started to drop when gassing of badger setts close to the affected farms began. Liam Downie's efforts in the
At the end of it, having undertaken exhaustive tuberculin testing. (44 million tests on 7 million cattle , over 4 years) combined with random sample herd testing, whole herd de-population of persistently infected herds, pre-movement testing and animal movement controls, the Republic had some seriously fed up farmers, a huge bill - and 35,000 reactors.
At about the same time as Downie's adventures, in
Ten years later (c 1997), one of Dr. O'Reilly's researchers had a second bite at the cherry. Eamon Costello repeated the experiment with ten pairings, but housed them for twelve months. Although these cattle were in close confinement for a year, the in-contact cattle in six of the groups failed to become infected. Evidence of bTB transmission was found in only four of the groups. Costello reported: ""The results of the experiment suggest that tuberculous cattle do not readily infect other cattle."
The TB investigation unit in
And our very own Defra recently spent £2.8 'salami slicing' reactor and in-contact cattle it what was known as the 'Pathogenisis project'. None of the over 1600 nasal swabs taken in this or a parallel study, from several hundred cattle over several months were positive on culture for onwards transmission of TB. Even from the 23 cattle with lung lesions. Not a single one.
Perhaps Mr. Forster is unaware of this work. Perhaps he is unaware of the VLA's carefully crafted spoligotype maps, showing the same strain of TB circulating between tested sentinel slaughtered cattle, and free ranging badgers in several well defined areas.
And maybe he has not seen the risk assessments, diligently carried out by AHOs in the SW which show that up to 92 % of TB breakdowns in hotspot areas are not related to cattle purchases.
(Chart of causes of TB in Devon first shown at the Killarney BCVA conference. These were compiled by AHOs after risk assessment of new breakdowns.)
And Mr. Forster doesn't explain to those of us enduring pernicious rounds of 60 day tests, with the skin test doing exactly what it says on the tin and picking up cattle ahead of active infection in most cases, just what else we are supposed to do to operate these 'ruthless' cattle measures. Or why we are 'blinded' to the cause of our problems, when every other avenue has been excluded.
To be fair, Mr. Forster mentions parallel badger control, briefly. But given the experiences of William Tait, and Liam Downie, Dr.Louis O'Reilly and Eamon Costello, he fails to explain how piling up more dead cattle will help anyway, when the cause of their continuing exposure to m.bovis is, in the majority of cases, not their dead herd mates at all.
My cattle have now ratcheted up 40 skin TB tests and one gammaIFN blood screen in eight years. Four of these read under severe interpretation. But despite these prolonged restrictions, no cattle have bounced back as 'slaughterhouse cases' missed by these tests.
Until the 2001 breakdown, we tested annually. The farm is ring fenced by woods and roads and we share no machinery, or accesses. We do share badgers with neighbours, who are also under prolonged TB restrictions and testing several times a year. After selling the main dairy herd and youngstock, we gradually restocked with calves or preMT pedigree animals as the core of a new beef enterprise. And it is those animals that are now reacting to exposure to bacteria deposited by the valley's wildlife reservoir. My AHO's risk assessment supports that view.
Mr. Forster argues that many farmers are 'blinded' by the notion of badger culling, and have ignored their own responsibilities with regard to cattle to cattle transmission.
Define 'responsibilities'?
Many of us have kept closed herds, operated as tight a biosecurity as we could, tested and slaughtered cattle as regularly as requested by Defra or its predecessors - and still suffered prolonged TB restrictions.
Both Tait and Downie experienced the futile frustration of a one sided policy, while answers as to why the Thornbury badger clearance was so successful drew the written parliamentary answer: "no other contemporaneous change was identified that could have accounted for the reduction in TB incidence in the area".
It is easy to offer glib solutions to a situation through the rose coloured spectacles offered by a distance of several hundred miles and at arm's length from the cattle under your care. But bacteria, hitching a ride on free ranging wildlife do not respect lines drawn on maps, neither to they respond to political bullying - they just spread.




