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Table 1 Outdoor pigs from regions with wild boar presence sampled for serological and microbiological testing for Brucella suis

From: Risk factors for contacts between wild boar and outdoor pigs in Switzerland and investigations on potential Brucella suis spill-over

Farm Nr

N pigs

Run-out

Farm type

Pig breed

Contact category

Particularities

N tested

Alive vs slaughtered

P1

1000

Pasture

F1 + B1

L/LW2

3

Close contact with wild boar shedding Brucella suis

51/27 19

A3 / S3 A + S

P2

5

Concrete

F

L/LW

2

 

7

S

P3

9

Mixed

F

M2

1

 

4

S

P4

70

Pasture

F

L/LW

3

 

30

S

P5

454

Pasture

F + B

M

4

Reproduction problems

5/6 16

A / S5 A + SO3

P6

12

Pasture

F + B

L/LW + hybrids6

1

 

3

S

P7

30

Pasture

F

M

None

Reproduction problems

14

A

P8

24

Pasture

F + B

M

4

 

2

A

P9

29

Pasture

F + B

M + hybrids

4

 

5

A

P10

14

Pasture

B

M + hybrids7

2

 

5/6

A / S

P11

23

Pasture + mixed

F + B

M

None8

 

3

A

P12

4

Concrete

B

M + Duroc

1

Boar borrowed from and sow lent to P5

4

A + S

P13

11

Pasture

F + B

M

None

Fattening pigs bought from B. suis infected piggery (P5)

6 5

A A + S

  1. 1 F: Fattening, B: Breeding.
  2. 2 L/LW: Large white or Landrace, M: Mangalitza.
  3. 3A: Alive, S: Slaughtered, SO: Stamped-out.
  4. 4Including 17 newborn piglets.
  5. 5Pigs slaughtered before the discovery of the outbreak.
  6. 6Hybrids were bought from another outdoor piggery for breeding purposes. In this other piggery, however, hybridization had been accidental (wild boar intrusion).
  7. 7A breeding domestic sow, which had mated with a wild boar (accidental intrusion), was bought pregnant of hybrid piglets from another outdoor piggery
  8. 8Sampling on request of the pig owner.
  9. Sampled domestic pigs from Swiss outdoor piggeries (P) in 2008–2010 in a study on risk factors for contacts between wild boar and outdoor pigs. Categories of contacts: (1) presence of wild boar around the enclosure (> 2 m); (2) presence of wild boar just outside the fence (< 2 m); (3) wild boar intrusions without mating; and (4) mating (hybrid births).