WORLD TRADE
ORGANIZATIONG/SPS/GEN/215
8 November 2000
(00-4717)
Committee on Sanitary and Phytosanitary Measures Original:  English
CLASSICAL SWINE FEVER IN GREAT BRITAIN
REPORT N° 5
Information from the European Communities1
1. POSITION AS AT 17 OCTOBER 2000
1.1 C ONFIRMED OUTBREAKS OF CLASSICAL SWINE FEVER
1.1.1 Classical Swine Fever (CSF) has been confirmed on 15 premises to 17 October 2000.  Details
are contained in Table 1.
Table 1:  Number of confirmed outbreaks of CSF and their location
Outbreak
numberLocation Date
confirmedPrimary/
secondaryLink No pigs Type
SF 00/01 Suffolk 08.08.00 Secondary SF 00/02 3,600 B, R F
SF 00/02 Norfolk 09.08.00 Primary 1,757 B
SF 00/03 Essex 09.08.00 Secondary SF 00/02 923 R
SF 00/04 Suffolk 12.08.00 Secondary SF 00/02 2,574 R
SF 00/05 Norfolk 12.08.00 Secondary SF 00/02 833 R
SF 00/06 Norfolk 04.09.00 Secondary SF 00/01,
 03, 05 or
071037 R
SF 00/07 Suffolk 05.09.00 Secondary SF 00/01 3411 B, R. F
SF 00/08 Suffolk 06.09.00 Secondary SF 00/07 4500 R, F
SF 00/09 Suffolk 10.09.00 Secondary SF 00/01 4366 B, R, F
SF 00/10 Norfolk 10.09.00 Secondary SF 00/07 2340 F
SF 00/11 Norfolk 12.09.00 Secondary SF 00/07 1748 B
SF 00/12 Suffolk 13.09.00 Secondary SF 00/04 470 F
SF 00/13 Norfolk 17.09.00 Secondary SF 00/05 4412 B, R, F
SF 00/14 Norfolk 26.09.00 Secondary SF 00/06 1100 B, R, F
SF 00/15 Norfolk 04.10.00 Secondary SF 00/11 650 F
B=Breeder  R=Rearer  F=Fattener
1.1.2 Summary statistics relating to MAFF action since CSF was confirmed in Great Britain on
8 August up to 17 October are summarised in Table 2.  From this it can be seen that:
                                                     
1 Relevant maps available on request.G/SPS/GEN/215
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(i) the total number of holdings placed under official movement restrictions (Form A) because of
suspected CSF has been 195.  CSF has been confirmed on 15 holdings, restrictions have been
lifted from 122 premises and movement restrictions remain in place on 58 holdings;
(ii) of the 58 holdings currently under official movement controls five are outside the counties of
Suffolk and Norfolk (one in Derbyshire, one in Durham, one in Lincolnshire, one in
Oxfordshire and one in Buckinghamshire).  53 are in the counties of Suffolk and Norfolk and
32 of these are in the four existing surveillance/protection zones.  Of these, seven are in the
Zone around outbreaks SF 00/01/07/08/09; eight are in the Zone around outbreaks SF 00/02;
11 are in the Zone around outbreaks SF 00/04/05/06/12/13/14 and six are in the Zone around
outbreaks SF 00/10/11/15.
Table 2:  Summary statistics
Number of premises placed  under  official movement control (Form A) since
8 August 2000195
Number of holdings where official movement  controls  (Form A) have been lifted
since 8 August122
Number of holdings where CSF has been confirmed since 8 August 15
Number of holdings remaining under official movement controls (Form A) at
1 October58
Of the holdings currently under official mo vement controls (Form A) at 1 October
(a) Number in the surveillance zone around SF 00/01/07/08/09
(b) Number in the surveillance zone around SF 00/02
(c) Number in the surveillance zone around SF 00/04/05/06/12/13/14
(d) Number in the surveillance zone around SF 00/10/11/157
8
11
6
Of the holdings currently under official mo vement controls (Form A) at 1 October
(a) Number linked by movement of pigs to a confirmed outbreak
(b) Number linked by movement of vehicles/people etc to a confirmed outbreak
(c) Number with no known link to a confirmed outbreak9
2425
Of the holdings currently under official mo vement controls (Form A) at 1 October
(a) Number in Norfolk and Suffolk
(b) Number outside Norfolk and Suffolk53
5
Number of Movement Restriction Areas currently in force 0
Number of holdings on which CSF has been confirmedTotal Number of pigs slaughtered on holdings where CSF has been confirmed15*
36,649
Number of holdings preventively depopulat ed because of a high risk of CSF
Number of pigs destroyed on these holdings26
23,069
* Disease on one holding was confirmed after preventive depopulation of the holding.G/SPS/GEN/215
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(iii) of the 58 holdings currently under official movement restrictions, nine are linked by the
movement of live pigs to a confirmed outbreak of CSF, 24 are linked to a confirmed outbreak
through the movement of vehicles, people et c and 25 have no known link to a confirmed
outbreak;
(iv) 36,649 pigs have been killed and destroyed on the 15 holdings where CSF has been
confirmed;
(v) a further 23,069 pigs have been preventively killed and destroyed on a further 26 holdings
because they were considered to be at high risk of CSF through direct contact with an infected
holding.
1.1.3 The number of serological tests for CSF carried out from 8 August to 15 October is
summarised in Table 3.  From Table 3 it will be seen that 42,419 serological tests on pigs from 182
herds have been carried out of which 566 have been positive for CSF.  These tests include tests
carried out as part of investigations on holdings with suspect CSF as well as tests carried out on CSF
infected herds at the time of depopulation as well as tests carried out preparatory to lifting protectionand surveillance zones around infected holdings.
1.1.4 The dates on which preliminary cleansing and disinfection was completed on the 15 infected
holdings and the dates on which the measures foreseen in Directive 80/217 can be applied in respect
of the surveillance zones are shown in Table 4.
2. SUMMARY
As of  17 October 2000:
(i) Classical Swine Fever (CSF) has been confirmed on 15 premises in Great Britain:  one in
Essex, six in Suffolk and eight in Norfolk.
(ii) 3-km and 10-km protection and surveillance zones have been established around each of the
15 confirmed outbreaks.  The protection and surveillance zones around outbreak SF 00/03 in Essex
were lifted on 22 September.
(iii) Epidemiological investigations suggest that infection was introduced in early June to the
primary outbreak (SF 00/02), a breeding unit in Norfol k. Thereafter, infection appears to have spread
to 4 rearing premises (SF 00/01, SF 00/03, SF 00 /04 and SF 00/05) in the same breeding pyramid
through the movement of infected weaned pigs. Lateral spread appears to have taken place from one
of these holdings (SF 00/01) to two neighbouring  holdings (SF 00/07 and SF 00/09) and from SF
00/07 to three other holdings (SF 00/08, SF 00/10 a nd SF 00/11) through the movement of infected
pigs.  While pigs moved from SF 00/11 may have spr ead infection to SF 00/15, it is also possible that
infection was introduced from SAF 00/02 and/or SF 00/02 by the movement of lories.  This leaves
four (4) holdings (SF 00/06, SF 00 /12, SF 00/13 and SF 00/14) for which an origin has yet to be
determined.  However, their proximity to other infect ed holdings and the fact that all have occurred in
infected areas established on or before 12 August, suggests that infection may have been introduced
by the movement of people, vehicles etc., the move ment of pigs onto and off holdings in these areas
having been prohibited after that date.
(iv) The nucleic acid sequences of the viral isolates examined are identical suggesting  that all the
outbreaks have been caused by the same virus.  Epidemiological investigations have failed to identify
the origins of the virus and the exact route of its introduction with certainty but it is possible the
source could have been contaminated pig meat contained in edible products discarded by people who
used public footpaths that ran adjacent to out door paddocks in which there were breeding sows.G/SPS/GEN/215
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Table 3:  Results of serological examinations carried out between 8 August and 15 October and
required to be reported under Commission Decision 2000/528/EC
CountyN° of
pigs in
countyTotal n° of
confirmed
outbreaksDate of last
outbreakN° of
holdings
with
suspect
CSF
reportedSero-
positiveSero-
negative
Norfolk 612,627 6 4 Oct 2000 79 385 18857
Suffolk 778,841 6 13 Sept 2000 61 179 19820
Essex 96,748 1 9 Aug 2000 5 2 1112
Bedfordshire 37,402 1 118
Berkshire 67,464 2
Buckinghamshire 41,125 1
Cambridgeshire 76,033 2 238
Carmarthenshire 3,965 1 12
Cheshire 81,057 2 268
Cornwall 58,668 1 133
Cumbria 47,494 1 71
Derbyshire 57,125 3 189
Devon 187,551 123
Dorset 137,862 2 24
Durham 32,409 1
Gloucestershire 17,436 85
Hampshire 106,080 1 21
Hertfordshire 17,436 1 10
Isle of Wight 5,600 1
Kent 30,628 1 3
Lancashire 121,571 1 9
Leicestershire 66,795 70
Lincolnshire 336,887 5 258
Nottinghamshire 116,932 119
Oxfordshire 168,766 3 52
Powys 14,864 120
Shropshire 127,816 1 58
Somerset 157,443 5 144
Staffordshire 98,641 14
Surrey 24,613 1 20
Wiltshire 149,887 184
Yorkshire 1,068,320 2 241G/SPS/GEN/215
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Table 4: Dates on which preliminary cleansing and disinfection was completed on CSF infected
holdings and on which preparatory work for lift ing controls on the protection and surveillance
zones may commence
Zone CSF infected
holdingDate
preliminary
cleansing and
disinfection
completed on
the infected
holdingDate work may
start
preparatory to
lifting the
surveillance
zoneDate work may
start
preparatory to
lifting the
protection zone
Zone 1 SF 00/02 19 August 3 September 18 September
Zone 2 SF 00/10 15 September 30 September 15 October
Zone 3 SF 00/04 14 August 29 August 13 September
SF 00/12 19 September 4 October 19 October
Zone 4 SF 00/11 21 September 6 October 21 October
Zone 5 SF 00/15 23 September 8 October 23 October
Zone 6 SF 00/01 12 August 27 August 11 September
SF 00/07 16 September 1 October 16 October
SF 00/08 15 September 30 September 15 October
SF 00/09 2 October 17 October 1 November
Zone 7 SF 00/05 14 August 29 August 13 September
SF 00/06 9 September 24 September 9 October
SF 00/13 30 September 15 October 30 October
SF 00/14 3 October 18 October 2 November
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