TB in Cattle and Badgers

George Eustice Excerpts

Wednesday 23rd October 2019 Westminster Hall

[The Minister of State, Department for Environment, Food and Rural Affairs (George Eustice)]

I congratulate the hon. Member for High Peak (Ruth George) on securing this debate and, as several hon. Members have said, on the sensitive way she approached a difficult and contentious issue, particularly in her recognition of the trauma this issue causes farmers.

Bovine TB is one of our most difficult animal health challenges. It is a slow-moving, insidious disease. It is difficult to detect. None of the diagnostic tests are perfect. I will come on to that later. It can exist in the environment for several months. There is a reservoir of the disease in the wildlife population, hosted in badgers. No vaccination is perfect. The best vaccine we have is the BCG vaccine, which typically provides protection of around 70%.

As the hon. Lady said, bovine TB also imposes a huge pressure on the wellbeing of our cattle farmers and their families. As many hon. Members have said, including my hon. Friend the Member for Congleton (Fiona Bruce), it is a tragedy when farmers have a TB breakdown. Some farmers lose show-winning cattle. For many, their herd of cattle is their pride and joy, and it is utterly soul-destroying to see those cattle lost.

No single measure will achieve eradication by our target of 2038. That is why our 25-year strategy, launched by my right hon. Friend the Member for North Shropshire (Mr Paterson) in 2013, sets out a wide range of interventions. Cattle testing is the cornerstone of our current programme. Several hon. Members, including the hon. Member for Edinburgh North and Leith (Deidre Brock), suggested that we are focusing on badgers at the expense of other interventions. That is simply not true. We have a wide range of testing regimes.

There are regular surveillance tests, every four years in the low-risk area, every year in the high-risk area and every six months in hotspots. There are pre-movement tests. Recently, we introduced compulsory post-movement tests for cattle moving between holdings. There are trace tests on cattle that have recently been added to a herd. We have tests on a herd following a sale of cattle to another herd, where that leads to a TB breakdown. We have radial testing in some areas and contiguous testing in others, where there are implications from a neighbour’s farm with a breakdown. Where there are inconclusive reactors, we have re-tests. Recently, we dramatically increased the use of the far more sensitive interferon gamma test, to ensure that we detect the presence of the disease and root it out faster from our herds.

It is not correct to say that our policy is built solely on the contentious badger cull policy. The cornerstone of our fight against TB is and always has been a very thorough testing regime, to remove the disease from cattle. All the demands we place on farmers through testing, despite the trauma concerned and the dangers they pose, are crucial to our fight against the disease. We must continue to be vigilant on this front. That was one of the recommendations from the review conducted by Sir Charles Godfray.

Seven years into our 25-year strategy to eradicate TB, we feel that it is a good time to reflect on the strategy and think about other elements we might want to evolve. That is why the former Secretary of State asked Sir Charles Godfray to conduct a review around the five-year point of the strategy. That was published a little under a year ago. Several hon. Members have asked why the response has been delayed and when to expect it. All good things are worth waiting for. I envisage the response being published soon. I hope it will not be interrupted by an election purdah.

The response to the Godfray review is an opportunity for us to take stock and review the current strategy, seven years in. The shadow Minister offered to work with me on this. When we publish our response to the Godfray review, I will invite him and his team to meet me in the Department for Environment, Food and Rural Affairs to go through what we are proposing. The tone of this debate has been slightly different from previous debates on the matter. While we will never entirely agree, I detect a sense that both sides can make a step towards one another and achieve a consensus on certain issues. I am keen to try to achieve that. This is a long- term fight—it is a 25-year strategy—so it would be helpful to have cross-party understanding and consensus on elements of it.

This debate relates to Derbyshire. As the hon. Member for High Peak knows, we took a difficult decision to pause a proposed cull in the south of Derbyshire. I understand that has caused great frustration to farmers. We did that to ensure that we can assess how we can have co-existence of badger vaccination and culling in parts of the edge area. That is why we chose to pause it for this year.

Badger culling is a controversial policy. We have powerful scientific evidence to show that the cull is working, despite passionate attempts by some to suggest otherwise. TB was first identified in the badger population as long ago as 1971. A series of trials in the 1970s demonstrated that a badger cull could lead to significant reductions in the incidence of the disease. That was borne out further by the randomised badger culling trial in the early 2000s.

Crucially, a recent independent peer-reviewed epidemiological study, published by Downs and others in the internationally-renowned scientific journal Scientific Reports, showed that licensed badger culling is leading to a significant reduction in the incidence of the disease in cattle in each of the first two cull areas. The study showed that there was a 66% reduction in TB incidence rates in Gloucestershire and a 37% reduction in the Somerset cull area, over the four years of intensive badger culling, relative to similar comparison areas. No significant changes have yet been observed in the third area in Dorset, but that is after just two years of culling. Furthermore, there was no evidence of an increase in the TB herd incidence rates in cattle located around the buffer area. One of the key findings of the report was that the so-called perturbation effect, which was a concern for some when the cull was launched, has not materialised in the culls so far.

The Government do not dismiss badger vaccination, but it is important to remember that the only vaccine we have is the BCG vaccine, which does not provide full protection. We do not have any hard, scientific evidence of how it works on a field deployment scale.

[Deidre Brock]

I may have missed something, but I noted from the Library report that was given to us that the Animal and Plant Health Agency was conducting an efficacy study and that the results were expected later this year. That is a research programme to identify an oral vaccine and a palatable bait. I wonder whether there is any update on that.

[George Eustice]

I think that was dealt with by my right hon. Friend the Member for Scarborough and Whitby (Mr Goodwill). In all my time in this role previously, I kept going and persevered with the research to try to identify an oral vaccine, because—in reality—if we want to deploy a vaccine on scale in the wildlife population, an oral bait vaccine would be the answer. I have had numerous submissions over the years inviting me to pull up stumps on that research, but I persevered.

However, I am afraid that in the end we could not get there, for the reason that my right hon. Friend pointed out, namely that a badger’s digestive system is too powerful and it breaks down the vaccine. All attempts to find other ways around that were unsuccessful. It is also the case that when such vaccines were deployed in the field, certain badgers would get a lot of the vaccine and others would get none at all, because there would be a propensity for some badgers to take up the bait but not others. So it is not something that we are continuing with at this stage.

I will pick up on a few points that hon. Members have made. The hon. Member for High Peak raised the issue of cows that were heavily pregnant with calves. She is right that it is an absolute tragedy to cull such cows and in fact a couple of years ago I changed the rules in this area, so that a cow that is in the final month of its pregnancy can now stay on the farm and be placed in isolation. We have even provided that a cow in the final two months of its pregnancy can be isolated, provided that the isolation facilities are sufficiently robust. So I have already changed the rules in that regard, because, as my right hon. Friend the Member for North Shropshire pointed out, it is horrendous when a cow that is about to give birth has to be shot on a farm.

The hon. Lady also raised the issue of the badger population in Derbyshire. The reality is that in in her area in the north of Derbyshire, where badger vaccination is taking place, incidence of the disease in badgers is quite low. However, that is not the case in south-west Derbyshire, particularly along the border with Staffordshire, where there is a high prevalence of the disease in the badger population.

[Ruth George]

What evidence is there for the incidence of the disease in badgers? Will the Minister look to test badgers in the cull areas post-culling, because it is so important that we are clear about whether there is or is not incidence of the disease?

[George Eustice]

We have a number of approaches. We do some roadkill surveillance in areas to identify where there is disease. Also, whenever we have a breakdown on a farm, an assessment is carried out by APHA vets to try to establish the most likely cause of that breakdown. So there are breakdown epidemiological reports.

The hon. Lady also raised an issue about herd size. In addition to the point made by my hon. Friend the Member for North Herefordshire (Bill Wiggin), the fact of the matter is that it is an epidemiological reality that the more cattle there are in a herd, the more interfaces there are with the environment and the more likely they are to pick up infection. I remember that some years ago our chief scientist in the Department for Environment, Food and Rural Affairs got very excited and thought that those with small herds must be doing something right. However, we concluded that it is simply a mathematical fact that a small herd has fewer interfaces with the badger population and therefore has a lower propensity to have a breakdown.

My hon. Friend the Member for Chatham and Aylesford (Tracey Crouch) raised an important issue about slurry. I can tell her that I have had meetings with Dick Sibley and that he has attended roundtable discussions we have had on this issue. However, as long ago as 2015 we launched a biosecurity plan that included slurry management best practice guidance, so this is an issue that we recognise and that we try to improve. The evidence is a little mixed, because the reality is that if we are testing and removing cattle, we would tend to remove them before the disease shows up in slurry, unless the test is ineffective and is missing those cattle. So this is an area that we are keen to look at further and, as I have said, we are in dialogue with Dick Sibley on some of these matters.

My hon. Friend the Member for North Herefordshire made a point about diagnostic tests. He is absolutely right—we are now allowing the use of unvalidated tests and, again, Dick Sibley is using one of those tests. We have also dramatically increased our deployment of the more sensitive interferon gamma test.

My right hon. Friend the Member for North Shropshire made an important point about epidemiology and, crucially, how we get daughter infection below one, so that we can put this disease into permanent retreat. The R₀—the reproductive number that he mentioned—is notoriously difficult to calculate, but we have a track record in our own history of taking this disease from a very high prevalence in the 1930s down to zero in the 1980s. So there is a point whereby, if we keep going, we can put this disease into permanent retreat.

[Mr Paterson]

rose—

[George Eustice]

I will take a brief intervention and then I will conclude.

[Mr Paterson]

I will make a point briefly. Will the Government look at evidence from other countries, particularly Ireland, where the evidence is quite contrary to what the SNP spokesperson—the hon. Member for Edinburgh North and Leith (Deidre Brock)—said, in that there is no intention of eliminating a species? This process is about getting the population per kilometre down to a level whereby the disease simply cannot reproduce itself, and then we will end up with a completely stable, healthy badger population, and this whole nightmare will go away.

[George Eustice]

We will look at that evidence, but this is a difficult issue. My right hon. Friend is right that our aim, as my right hon. Friend the Member for Scarborough and Whitby pointed out, is to get the badger population down by 70% in the four years of the cull; it is not our intention at all to eradicate the badger population. This is an issue that we will continue to look at because, as we plot how to get from where we are now to being officially TB-free by 2038, it is clearly an important issue.

My right hon. Friend the Member for Scarborough and Whitby also pointed out some of the challenges of vaccinating badgers and the further challenge that we have had with an oral vaccination. However, if we can use such a vaccination, there are also some advantages. It provides herd immunity and there is some evidence that cubs born in badger populations that have been vaccinated have a higher degree of resistance to the disease than other badgers.

Finally, the hon. Member for Edinburgh North and Leith asked about Scotland. The approach taken in Scotland is very similar to the approach that we take in a low-risk area elsewhere. Scotland does not have a large badger population and nor does it have a presence of the disease in the badger population, which is in common with the north of England. Therefore, the nature of the challenge in Scotland is very different from that elsewhere.

The badger population has more than doubled in this country over the last 20 or so years. In the cull areas, which we are targeting because the disease is rife there, we simply look to reduce the badger population by 70% for the duration of the cull.

[Dr Drew]

The one thing that has not been mentioned—I should have mentioned it myself, of course—is cattle vaccination. Such vaccination was always 10 years away, but I gather that it is now five years away. Are the Weybridge and Pirbright research institutions still working on this vaccination and, if so, can they clarify where they are with that work?

[George Eustice]

Yes, we are continuing to do cattle vaccinations; that particular research has not been stopped. As the hon. Gentleman says, cattle vaccination is an important line of work and it is one that we intend to continue.