II. BOVINE TUBERCULOSIS IN THE UK
7. Historically, Government policy towards the eradication
of bovine TB has concentrated on three areas. First, since the
1930s, the immediate public health implications have been addressed
through the pasteurisation of virtually all milk. Heating milk
destroys the bacterium responsible for the disease (Mycobacterium
bovis or M. bovis) in the same way as it is destroyed
by cooking meat. The sale of unpasteurised or "green top"
milk is closely regulated. In England and Wales,all herds from
which untreated milk is sold directly to the public are subject
to annual testing for bovine TB, while in Scotland the sale of
such milk is prohibited. Secondly, all carcases are inspected
at slaughterhouses by Meat Hygiene Inspectors for signs of tuberculosis.
Thirdly, the disease has been attacked at source by a programme
of eradication of bovine TB in the national herd. This began in
1935 with voluntary testing but in 1950 a compulsory programme
was introduced. Animals reacting positively to the TB test ("reactors")
were removed for slaughter and two further tests of each remaining
animal were required before the herd was declared TB free or "attested".
By commencing the eradication programme in low incidence areas
and using cattle from these herds to restock in the worse affected
areas, after ten years the whole of the UK was officially attested.
Continuation of the policy meant that by 1986 the number of infected
cattle had fallen to 0.01% of the national herd.[5]
8. The dramatic reduction in the national incidence
figures, however, masks the fact that the eradication programme
met with markedly less success in the south west of England (see
figure 1). This indicated that there was an infection source in
these areas that was probably a wild animal reservoir. In 1971
attention switched to the badger as a potential wildlife reservoir
when a dead badger infected with bovine TB was found on a farm
in Gloucestershire which had just suffered a TB breakdown.[6]
Tests by MAFF showed that the prevalence of TB in badgers was
higher than in other species and the link with TB in cattle was
convincing enough by 1973 for MAFF to sponsor the Badger Act which
gave Ministers the power to issue licences for the culling of
badgers where they presented a threat to animal health. In 1975,
as a result of concerns about individuals shooting badgers or
killing them by other means, the Conservation of Wild Creatures
and Wild Plants Act permitted the use of gas as a method of control
and the Government undertook that only MAFF staff or authorised
persons could obtain licences. At the same time the Consultative
Panel on Badgers and Tuberculosis was formed to advise MAFF on
this area of policy. The Panel had members drawn from the fields
of conservation, welfare, farming and veterinarians.
9. According to the British Veterinary Association
(BVA), the gassing strategy was "effective" but was
considered "inhumane and therefore unacceptable".[7]
Criticism of the practice and of the purported link between infected
badgers and cattle led to MAFF asking Lord Zuckerman to review
the problem and make recommendations. During the review period
(September 1979 to October 1980) gassing operations were suspended.
Zuckerman's report, Badgers, Cattle and Tuberculosis, concluded
that "on scientific grounds it was clear that badgers constituted
a significant reservoir of bovine TB", that "the high
density and close proximity of the cattle and badger populations
in parts of South-West England favoured the transmission of the
disease" and that "the disease seemed to have spread
since control measures had been halted".[8]
Following his recommendations, the so-called "clean ring"
strategy was introduced in which all badgers were culled in the
area of an outbreak until a clean ring of uninfected badger setts
was found. Continuing doubts over the humaneness of gassing led
to its replacement by cage trapping and shooting. We were told
that the clean-ring policy was "effective".[9]
However, in September 1984 MAFF implemented another of Zuckerman's
recommendations which was to initiate a second policy review three
years after his report. Professor Dunnet was therefore commissioned
by the Government "to conduct an overall review of the problem
of dealing with badgers infected with bovine tuberculosis insofar
as it affects the eradication of the disease in cattle, taking
into account changes in the field and research since Lord Zuckerman
reported on the problem in 1980". In March 1986 Dunnet concluded
that there had to be some form of badger control. He expected,
however, that there would soon be an effective means of testing
live badgers for TB and that a further review would be possible
once sufficient data from research and badger removals were available.
Consequently, he advised the use of an "interim strategy".[10]
Figure 1
Percentage of all cattle herds with reactors (confirmed and unconfirmed) 1962-1997
10. The interim strategy put in place in 1986 involved
the removal and culling of badgers only from farms where a TB
incident had been confirmed and attributed to badgers. Of the
three badger control strategies of the last 25 years, it is this
which has attracted most criticism in evidence to us. The NFU
described it as "much maligned ... flawed for several different
reasons".[11]
Other witnesses identified these flaws as twofold: first, the
interim strategy targeted only badgers on the farm and not whole
social groups with the effect of encouraging the movement of badgers,
possibly infected with TB, into the cleared areas;[12]
and second, there was too long a delay between the detection of
TB in cattle and action taken against the badger.[13]
The statistics indicate its failure as incidence of TB increased
in traditional hotspots and the disease appeared in other previously
clear areas. By 1993 there was "general recognition"
among members of the Consultative Panel that "the Government
needed to address the increased incidence of badger-related TB
breakdowns".[14]
On 8 December 1993 the then Parliamentary Secretary, Nicholas
Soames MP, announced a new six-point plan, the centrepiece of
which was a five-year trial of a live test for TB in badgers.
The interim strategy would remain in place outside the trial areas.[15]
11. There were doubts about the live test from the
start. In examining MAFF's Departmental Annual Report in 1994,
our predecessor Committee concluded that "We are extremely
doubtful that this trial will produce meaningful results, and
we consider that the Government is floundering as a result of
the need to be seen to be doing something, while simultaneously
placating anxious cattle farmers and badger supporters within
the wider community". Somewhat presciently, they added "the
most likely upshot of this policy will be to provide The Archers
with a rich vein of story-lines in the years ahead, rather than
to solve the real problem which exists".[16]
In the event, the trial was abandoned after 18 months due to the
poor sensitivity of the test which correctly identified only 41%
of infected badgers, as well as problems with the trial design.
The interim strategy itself ended upon the publication of the
Krebs review in December 1997, although the new Government had
already halted badger removal operations in any new counties immediately
after the 1997 election.[17]
While awaiting decisions on the implementation of the Krebs report,
there has been a moratorium on culling of badgers in the UK.
12. There are clear lessons to be drawn from this
short review of past policies. The first is, as Mr Rooker told
us, "the old policies did not work ... they did not control
bovine TB, they certainly did not eliminate it."[18]
The RCVS believed that the failure of these policies, specifically
the abandoning of the clean ring strategy in 1986, meant that
the overall aim of achieving the eradication of TB in cattle which
had been mooted in the 1930s was no longer possible: TB has become
"endemic in the badger population and now there is effectively
no hope of eradication and we have to look to control".[19]
Professor Bourne accepted that the aim was now control, rather
than elimination, but reflected that "the effectiveness of
these policies is unknown".[20]
The second lesson is the effect of failure. Self-evidently, the
worst effect is that bovine TB is continuing to rise but there
is also the impact on the willingness of both farmers and conservationists
to co-operate with any new strategy. The TFA described it as "frustrating
that after many years of research no adequate method has been
found to check the spread of the disease", while the NFBG
pointed out that "over 20,000 badgers have been killed already
by the Government, and yet TB in cattle is increasing".[21]
The third and final lesson is why these strategies have been unsuccessful.
It is accepted that the main explanation lies in the lack of a
sound scientific understanding on which policy decisions could
be taken. The badger groups quite rightly object that "the
terms of reference of the last three independent scientific reviews
[Zuckerman, Dunnet and Krebs] have focussed on badgers and bovine
tuberculosis; they have not focussed on the whole issue."[22]
It is equally the case that, as the Country Landowners' Association
(CLA) wrote, "there has, for too long, been too little science
and too much political judgement in this policy area".[23]
As Professor Krebs told us, past policies had been to "get
on and do it without finding out whether the thing you are doing
is really the thing that is going to have an effect. That is why
we are in this situation at the moment. It is not because we have
focussed on badgers; we just have not approached it in a way that
policy is based on evidence."[24]
To avoid the charge in future that "significant amounts
of public money [have been] spent on TB control measures that
were inadequately thought through and were not subject to adequate
scientific scrutiny",[25]
it is essential that future policy in this area is based on sound
science and conclusive evidence and commands the full commitment
of all parties involved.
CURRENT SCIENTIFIC UNDERSTANDING OF THE EPIDEMIOLOGY
OF BOVINE TUBERCULOSIS
13. An understanding of the epidemiology of bovine
TB requires identification of the factors that determine exposure
of cattle to the pathogen and those that predispose individuals
to infection. While the factors influencing susceptibility still
require greater investigation, field studies on badgers give some
indication of transmission routes and patterns of infection. Infection
status of individual badgers can vary greatly. Some individuals
appear resistant to infection while others may carry a latent
infection, for example, where they carry an infection but do not
excrete bacilli but then commence excreting bacilli at a later
date. However, there is no clear evidence of acquired immunity
in adults but some data to suggest cubs may develop immunity.
Development of an infection in individual badgers is probably
related to age and stress, in a manner similar to that recorded
for human tuberculosis. There are several potential routes of
infection, via coughing from a respiratory infection, through
sputum, open wounds with infected pus and through urine or faeces.
There is reasonable evidence that mothers pass the pathogen to
their cubs by coughing on them in humid and enclosed underground
setts. Another possible route is through urine, deposited at scent
marking places and badger latrines.[26]
14. Rapid transmission occurs within badger groups
but between group transmission is relatively scarce.[27]
Since most lesions are found in badger lungs we can suppose that
most between badger transmission occurs through the pulmonary
route. Infection rarely causes mortality in badgers and does not
induce morbidity or influence behaviour in anything but a small
proportion of severe cases, so most workers agree that TB in badgers
has little influence on badger abundance. There is no evidence
that infection increases with badger density but there is some
evidence that group sizes of more than eight individuals are more
likely to be infected than smaller group sizes although this idea
remains unproven. There is the possibility that some setts may
remain infected for long periods of time since warm, dark and
humid conditions tend to favour survival of the bacillus, perhaps
for several months.
15. Further insight can be achieved by undertaking
molecular typing of M. bovis. Work to date indicates that
the TB spoligotypes (particular molecular strains - see Glossary)
are usually clustered in specific areas implying that herd breakdowns
are localised events originating from a relatively static reservoir.
In many instances cattle and badgers have been found to share
similar spoligotypes but further sampling of badgers, cattle and
other wildlife would help to identify which species can share
the infection. We stress, however, that care is needed in the
interpretation of these data since without careful temporal as
well as spatial sampling one can never be sure of the direction
of infection and there is a tendency to assume transmission from
wildlife to cattle rather than the reverse.[28]
16. Since cattle infected with TB usually carry respiratory
infection, a possible route of badger to cattle transmission is
from the inhalation of bacilli from badger urine.[29]
Cattle preferentially graze edges of fields and when grazing pressure
is high they will be forced to graze close to badger latrines
and scent marking areas that are frequently deposited at the edge
of fields. One hypothesis states that since badgers urinate when
they scent mark and they do this when they cross field boundaries
then there would be increased transmission where their home range
includes small fields. There is some evidence to support this
hypothesis but other evidence indicates that a range of habitat
and climatic conditions influences transmission between species.
17. There are other theories of transmission which
do not involve the badger at all. It has been suggested that other
wildlife species may act as alternative or additional TB reservoirs.
Bovine TB has been found in a range of species, including ferrets,
rats and deer, as noted in the Krebs report,[30]
although it is difficult to assess its prevalence as the number
of samples examined by MAFF for which data is available is too
small. These species may be "spill over hosts" from
badgers but provide a significant reservoir for cattle infection
even when prevalence in these species is low since they may have
frequent contact with cattle. Better estimates of infection levels
and of possible transmission routes involving species other than
the badger could be invaluable in determining a policy to control
bovine TB. We recommend that MAFF ensure that a thorough and
well designed sampling procedure of wildlife species other than
the badger be put in place in the badger removal areas to determine
if M. bovis can persist in other species when badgers are
removed. This sampling should concentrate on species with frequent
contact with cattle including rats, ferrets and deer.
18. There is also the question of the extent to which
TB infection in cattle results from intra-species transmission,
ie cattle to cattle.[31]
The Krebs report dismisses this theory, citing a 1995 research
paper which indicates that "present evidence suggests that
although some recently infected cattle do excrete M. bovis,
transmission to other cattle is not common".[32]
Krebs did not recommend any further work on this issue and MAFF
has made no provision for any research projects in this area in
the current financial year. However, we believe that it should
not be overlooked. We recommend that further research be undertaken
into the relative importance of cattle to cattle transmission
of bovine TB and means of controlling it.
THE BADGER
19. The badger (Meles meles) is widely distributed
across Eurasia, ranging from about 15°to
65°N,
and from about 10°W
to 135°E.
The most recent global report on the population and management
of badgers concludes that population density is moderate (0.1
-0.99 badgers/km²) over most of central and eastern Europe
and high (>0.1 badgers/km²) in Ireland, Sweden and Great
Britain.[33]
No estimate is made of the total population size, but Griffiths
and Thomas conclude that available data "do not evoke a great
deal of concern for the status of the badger in Europe as a whole".[34]
Thus, the species is not currently endangered.
20. Badgers occur throughout the whole of mainland
Britain and also on the Isle of Wight, Arran and Anglesea.[35]
The number of badger social groups in Britain was estimated to
be about 42,000 in the late 1980s[36]
and about 50,000 in the mid-1990s, [37]
an increase of 24%. These counts, based on numbers of main setts,
translate into approximate numbers of adult badgers of 250,000
and 295,000 respectively, assuming a mean group size of 5.9.[38]
More detailed data on changes in population sizes are available
from three study areas: Wytham Woods, Oxfordshire; Woodchester
Park, Gloucestershire; and part of the South Downs, East Sussex.[39]
All three studies also indicate an approximate doubling of badger
population density since the 1970s. Given that the British countryside
has long since ceased to be a naturally regulated ecosystem, it
is meaningless to discuss whether the population density of badgers
has reached an "unnatural" level.
21. The maximum growth rate of badger populations
is considered to be about 70% per annum but this rate of increase
falls as badger populations increase, probably as a consequence
of competition between badgers for food.[40]
Competition for food results in reduced breeding rates, which
will ultimately regulate the population at some level determined
by food availability. Before this level is reached populations
may be limited by the availability of suitable ground so the abundance
of badgers and the population growth rate is a balance between
availability of setts and food coupled with past culling. Most
populations of badgers have been increasing because their natural
mortality, including those killed in road accidents, is about
50% and usually lower than the reproductive output of the population.
When a population is suppressed, badgers will have increased productivity
and there will be dispersal into unoccupied areas so that localised
culling is compensated for and is unlikely to have a significant
impact on total population size, a conclusion also reached in
a recent Council of Europe report.[41]
22. Badgers were first protected in Britain by the
Badger Act 1973 (amended in 1981 and 1985) and subsequently by
the Badgers Act 1991, Badgers (Further Protection) Act 1991 and
Protection of Badgers Act 1992. This protection has always been
acknowledged to be welfare-based: that is, it is intended to defend
the species against cruelty such as badger-baiting rather than
to conserve it for ecological reasons. Apart from being listed
in Appendix III of the Bern Convention, badgers are not the subject
of any international treaty or legislation. In most of the countries
to which the Bern Convention applies, badgers are hunted either
for sport or because they are perceived as a pest; and over much
of Europe badger setts were gassed in the 1960s and 1970s for
purposes of rabies control.[42]
With the possible exception of the Netherlands, therefore, it
is probably fair to say that since the 1970s badgers have enjoyed
better protection, not just in theory but in practice, in Britain
than anywhere else in the species' range.
23. The ecology and behaviour of badgers, especially
their feeding ecology, have been extensively studied, especially
in the UK.[43]
In addition, an assessment of the potential ecological impact
of badger culling has been undertaken by MAFF's Central Science
Laboratory (see paragraph 90 below).[44]
Badgers prey on a wide range of animal and plant species but there
is no evidence that they impact significantly on any of these
other than hedgehogs. In the UK, they have no predators other
than man. They have readily discernible effects on the landscape
in the immediate vicinity of a main sett[45]
but only minor effects elsewhere: for example, they may act as
seed dispersers but probably not to any significant extent nor
for any plant species that are uncommon. Altogether, badgers seem
to be an "ecologically neutral" species, in the sense
that few significant positive or negative effects on other species
would be expected as a result of their localised extinction.
24. Of course, badgers also have a special cultural
significance in this country. They are used as the symbol of the
Wildlife Trusts and many people are members of badger groups which
originally came into existence to protect the species against
badger baiting and other cruelty, and now have a more general
protective role.[46]
It should also be said that, despite the deep division evident
in responses to badger culling, farmers can also be badger lovers.
Many farmers are not only prepared to tolerate but actively wish
to encourage populations of healthy badgers on their land.[47]
INCIDENCE OF BOVINE TUBERCULOSIS IN CATTLE
25. Although official figures for the whole of 1998
are not yet available, there is no doubt that the recent escalation
in the incidence of bovine TB in cattle has continued. Table 1
below gives the number of new confirmed tuberculosis incidents
from 1995 to 1997 with provisional figures for 1998.
Table 1
TUBERCULOSIS - NEW CONFIRMED CATTLE HERD
INCIDENTS
| | 1995 | 1996 | 1997 | 1998 provisional |
| GB Total | 449 | 471 | 515 | 736 |
| West Region | 316 | 329 | 413 | 581 |
| Wales | 104 | 102 | 62 | 93 |
| Rest of England | 17 | 25 | 30 | 59 |
| Scotland | 12 | 15 | 10 | 3 |
Note: A small number of laboratory test results are still pending
so the 1998 figure may change slightly as further results become
available.
Source: Ministry of Agriculture, Fisheries and
Food.
Of course, these figures relate only to herds which
had been TB free, so the real number of cases is even higher.
In 1997 there were 515 new confirmed herd breakdowns which meant
the total number of herds under restriction was about 750, according
to the NFU.[48] Table
2 shows the increase in the number of cattle compulsorily slaughtered
after reacting to the test or coming into contact with such animals
over the last twenty years.
Table 2
TUBERCULOSIS - GREAT BRITAIN NUMBER OF
CATTLE COMPULSORILY SLAUGHTERED
| YEAR | TOTAL |
| 1998 | 6086 |
| 1997 | 3760 |
| 1996 | 3881 |
| 1995 | 3451 |
| 1994 | 2773 |
| 1993 | 2455 |
| 1992 | 1626 |
| 1991 | 1304 |
| 1990 | 1570 |
| 1989 | 1098 |
| 1988 | 782 |
| 1987 | 1173 |
| 1986 | 638 |
| 1985 | 843 |
| 1984 | 733 |
| 1983 | 660 |
| 1982 | 605 |
| 1981 | 1011 |
| 1980 | 942 |
| 1979 | 1160 |
| 1978 | 921 |
| TOTAL | 37472 |
All figures include cattle reacting to the tuberculin test and
contact animals. The animals are from herds which have had their
Official Tuberculosis Free Status suspended. Some herds will have
disease confirmed, others will not.
Source: MAFF statsheet 7, updated by information
from MAFF.
It can be seen from these figures that there has
been a steady rise in incidents since the low point of the early
1980s, and a far more dramatic rate of increase since 1990. The
TB Committee of the National Beef Association had been told by
"scientists involved in research into this disease"
that "the spread will increase even faster in 1999."[49]
They were rightly concerned that TB incidents were occurring in
new areas including Cheshire, the main dairying area of the UK.
While still mainly a problem in certain hotspot areas of the country
such as the South West which experienced a 45% increase in January
to May 1998 compared to the same period in 1997 and the West Midlands
where the increase was 27%,[50]
Mr Rooker admitted that "the disease is on the move ... there
is a northward spread, Derbyshire, Shropshire, Staffordshire".[51]
Major outbreaks are also occurring in Wales, although in Scotland
the incidence is low and falling.
26. This increase in the number of cases and the
geographical spread of the disease is causing great alarm in the
farming industry. Two contributors to the inquiry referred to
bovine TB as becoming "out of control"[52],
while the TFA spoke for many when they wrote of "a great
fear amongst TFA members about the spread of TB ... the TFA is
alarmed at the rapid rate of growth in TB outbreaks over recent
years".[53]
Their prediction that "If TB continues to increase in our
cattle population at the rate it has been over the past year then
we could have killed 110,000 cattle by the end of the five year
period of the Krebs trial" is truly horrifying.[54]
Comparisons of the breakdown rate in 1998 to that in 1948[55]
underline the dread that the UK industry is returning to the pre-war
levels of TB infection. However, the overall rate is still low
for the UK as a whole. In 1997 0.07% of the national herd tested
positive and, as Professor Krebs reminded us, "One should
always bear in mind that TB, although increasing and increasing
quite rapidly, is still a very rare disease. It is only a very
small proportion of the national herd that is affected by it."[56]
In addition, the public health risks of the situation are extremely
low. Comparisons have been made to the BSE crisis at various points
throughout this inquiry but we wish to emphasise that there is
no call for the public panic on that issue to be reignited over
bovine TB. A study in 1995 indicated that only 1% of human
tuberculosis cases could be attributed to M. bovis and
those were likely to be old cases which had lain dormant.[57]
We fully accept MAFF's advice that "Human health generally
continues to be protected by the heat treatment of milk and by
cooking meat"[58]
and the advice of Professor Krebs and the RCVS that there is no
evidence of higher incidence of bovine TB among people working
closely with animals.[59]
While the public health implications of any disease must be
borne in mind and the lessons of the BSE case indicate the growing
public need for information, we agree with Mr Rooker that the
risk in this case "is not great"[60]
and we believe it should not be overplayed. We are concerned that
the rise in bovine TB in cattle may be misunderstood and misrepresented
in the media as being linked to the disturbing rise in the number
of human TB cases in Britain, Eastern Europe and the USA. These
are caused by the bacterium M. tuberculosis,
a quite distinct species from that responsible for bovine TB.
27. Nevertheless, we would certainly agree that the
rising incidence of bovine TB is a serious problem, with implications
for public finances, the farming industry and animal welfare.
In 1997 total expenditure on controlling TB in cattle in Great
Britain was £16.1 million, of which £7.1m was spent
on TB testing, £2.4m on compensation for slaughtered cattle,
£4.1m on staff, £1.7m on badger removal operations and
£1.7m on research (£0.9m was received for salvage value
of carcases).[61]
These costs were certain to rise significantly in 1998 and after,
even without expenditure on the Krebs recommendations, owing to
the increased number of cattle affected and the change of compensation
rates from 75% to 100% of market value from August 1998. The spread
of TB also increases the overall cost of testing to the public
purse as the rate of testing is regulated by EU Directive 64/432/EEC
which requires that where the level of disease for a country is
less than 0.1% of the cattle herds, then testing is on a four
yearly basis; if the level rises to between 0.1% and 0.2%, testing
is three yearly; between 0.2% and 1% is two-yearly; and greater
than 1% requires annual testing.[62]
At present, there is no such thing as tuberculosis-free status
for a country and although this is provided for under amendments
to the Directive which come into force on 1 July 1999, MAFF is
hopeful that it "can interpret it to be done on a regional
basis"[63]
in order to gain officially tuberculosis-free (OFT) status for
the large majority of Britain which has a low rate of incidence.
28. The official method of recording TB statistics
does not reveal the seriousness of the situation for individual
farmers. As the CLA pointed out "`0.4 per cent' means 1 in
250 herds, and `1 per cent' means 1 in 100".[64]
In the South West region of Gloucester, Avon and Wiltshire where
the rate is now 2.59%, that means approximately 1 in 40 and for
Cornwall with a present rate of 1.83%, it is about 1 in 50.[65]
If a reactor is found during routine testing, movement restrictions
are placed on the farm to prevent the spread of infection and
the affected animal is taken away for slaughter. If TB is confirmed
at slaughter, an incident or breakdown is recorded. Other farms
considered to be at risk are tested, as are animals moved off
the farm in the months before the incident. Cattle on the affected
farm are tested again at a minimum of sixty days intervals and
the restriction on movement is lifted only when two successive
tests show the whole herd is TB-free.[66]
These restrictions can remain for many months or even years, creating
what the BVA described as "the devastating socio-economic
effects of bovine tuberculosis on cattle farmers".[67]
29. While farmers are compensated for the cost of
the slaughtered animals, it has been estimated by the NFU and
accepted by MAFF that the compensation represents just 16% of
the total cost of a breakdown.[68]
We were told that other consequential costs mean that "the
average outbreak costs each individual farmer £3,000 a month
for the duration of his breakdown".[69]
A high proportion of this total represents loss of potential profit
rather than actual expenditure, although MAFF agreed that the
loss of production and the restriction order "can cause significant
disruption to a farm business, and can have prolonged effects
on the viability of a farm".[70]
MAFF listed the extra costs for "buildings, equipment and
bedding, disruption of breeding programmes, loss of revenue from
selling cattle at less than optimum times, purchasing or leasing
additional milk quota to allow extra production to be marketed,
loss of subsidy, and costs for additional feed".[71]
The NFU told us that this was particularly a problem for farmers
who sold store animals who would have no output from the farm
during the restriction period, a point made also by the National
Farmers' Union of Scotland.[72]
The cost of insurance to cover such costs is prohibitive in high
risk areas, if it is available at all, so the farmer has to bear
a considerable financial burden. Individual farmers told us of
costs of £200,000 in the last ten years and of the same sum
in a single year.[73]
30. Mr Jerry Rider of the TFA brought home to us
the point that the financial implications of a breakdown are more
than matched by the enormous stress experienced by the farmer
who cannot plan ahead and has no way of knowing whether bovine
TB will recur in the herd.[74]
We accept the TFA's argument that this is particularly serious
for tenant farmers who do not have the value of the farm to fall
back on and must continue to pay rent on the property.[75]
However, it is a huge problem for all farmers whose herds are
affected. There are fears that the situation might be made even
worse if supermarkets decide that affected herds should be excluded
under quality assurance schemes as a result of public concerns
about the safety of food.[76]
The NFU also claimed that "there is recent evidence to suggest
that two-tier cattle markets are developing within certain hotspot
areas".[77]
In addition, there are implications for trade if animals and products
from affected herds are banned under EU law.[78]
The consequences to the farming industry if current levels
of TB incidence are maintained, or worse continue to increase,
clearly warrant the attention now being paid to the issue.
31. There remains the question of the effect of bovine
TB on the cattle themselves. The evidence is that while infected
cattle do suffer from the disease, the greater difficulty is the
stress of testing which of course increases in frequency in the
affected areas. The NFU, despite advocating more frequent testing,
told us that "the injection seems to distress them enormously
and the repeat exercise is not only dangerous and stressful for
the animal, it is quite dangerous for the operators who are driving
the stock through".[79]
In any case, it is obviously in the interest of both cattle and
badgers, despite their apparent lack of suffering, for the disease
to be controlled.
32. It is evident then that a policy is needed
to control bovine TB in cattle on economic and animal welfare
grounds. It is also clear from the rapid rise of the disease that
a solution is needed with some urgency if the problem is not to
gain an even greater hold on ever widening areas of the country.
The latest statistics on the increased rate and widening geographical
distribution of herd breakdowns are alarming. We believe that
MAFF should pay more attention to identifying the principal cause
of this increased rate. One approach would be to apply models
and examine whether the spatial and temporal patterns observed
could be accounted for as a consequence of the cessation of the
badger cull in 1997. Other factors and hypotheses must also be
addressed. These should include the movement of cattle between
farms, the presence of other immuno-suppressive infections such
as Bovine Immunodeficiency Virus (BIV), the direct and indirect
consequences of BSE, climate change and possible nutrient deficiencies.
In the next section, we examine the most recent attempt by MAFF
to determine a scientifically sound policy for managing bovine
TB.
5 Information in this and following paragraphs from
MAFF Factsheet B4 and Krebs, Chapter 1. Back
6 Krebs
3.2.2. Back
7 Ev. p.196. Back
8 Krebs, 1.4.10, 1.4.11. Back
9 Ev. pp.172, 196. Back
10 Krebs,
1.4.15. Back
11 Q 415. Back
12 Q 531; Ev. pp. 186, 207. Back
13 Ev. p.114. Back
14 MAFF PN 432/93. Back
15 Ibid. Back
16 Third Report from the Agriculture Committee, Session1993-94, para
8. Back
17 Q 669. Back
18 Q 694. Back
19 Q 515. Back
20 Q 210; Ev. p.17, para 2. Back
21 Ev. p.14; Q 286. Back
22 Q 289. Back
23 Ev. p.209. Back
24 Q 12. Back
25 Ev. p.54, para 3.6. Back
26 See
Krebs, Chapters 3 and 4, for this and following paragraphs. Back
27 Cheeseman
et al, 1985. Back
28 Q
23. Back
29 Q
34. Back
30 Krebs,
2.2.3. Back
31 Unprinted
evidence from Martin Hancox. Back
32 Krebs,
2.3.2. Back
33 Griffiths,
HI and Thomas, DH 1997 The conservation and management of the
European badger (Meles meles). Nature and Environment report
no.90, Council of Europe. Back
34 Ibid,
p.56. Back
35 Neal
E and Cheeseman CL, 1996 Badgers.London: Poyser. Back
36 Reason
et al, 1993. Back
37 Wilson
et al, 1997 Changes in the British badger population, 1988-1997.
London: People's Trust For Endangered Species. Back
38 Cresswell
et al, 1990. The history, distribution, status and habitat requirements
of the badger in Britain. Peterborough: Nature Conservancy Council. Back
39 Da
Silva et al, 1993 Habitat, food availability and group territoriality
in the European badger (Meles meles). Oecologia,
95; Rogers et al, 1997, The demography of a high density badger
(Meles meles) population. Journal of Zoology; Ostler and
Roper, 1998, Changes in size, status and distribution of badger
(Meles meles) setts during a 20 year period. International
Journal of Mammalian Biology 63, 200-209. Back
40 Anderson
and Trewella, 1985 Population dynamics of the badger (Meles
meles) and the epidemiology of bovine tuberculosis (Mycobacterium
bovis). Philosophical Transactions of the Royal Society of
London, B. Back
41 Griffiths
and Thomas, 1997, p.24. Back
42 Griffiths
and Thomas, 1997. Back
43 Neal
and Roper, 1991, Neal and Cheeseman, 1996; Krebs et al, 1997. Back
44 Bourne,
1998. Back
45 Neal
and Roper, 1991. Back
46 Q
357; Ev. p.53. Back
47 Q
418. Back
48
Ev. p.101. Back
49 Ev.
p.186. Back
50 Ev.
p.101. Back
51 Q
682. Back
52 Ev.
pp.174, 186. Back
53 Ev.
p.114. Back
54 Q
491. Back
55 Ev.
p.172. Back
56 Q 108. Back
57 Krebs,
1.2.5, 1.2.8. Back
58 Ev. p.134. Back
59 Qq 102, 506. Back
60 Q
665. Back
61 Ev.
p.142. Back
62 Q
557. Back
63 Qq
554, 557. Back
64 Ev.
p.208. Back
65 Q
561. Back
66 MAFF
Factsheet B4. Back
67 Ev.
p.195. Back
68 Q
456. Back
69 Ibid. Back
70 Ev.
p.141. Back
71 Ibid. Back
72 Q
399; Ev. p.230. Back
73 Qq
438, 482. Back
74 Q
482. Back
75 Q
477. Back
76 Ev.
pp 187, 195. Back
77 Ev.
p.99. Back
78 Ev.
pp.114, 173. Back
79 Q
399. Back
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