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Table 1 Demographic information of the farms included in the study

From: Effect of PRRSV stability on productive parameters in breeding herds of a swine large integrated group in Spain

Farm identification Location (Spanish region) Sows Genetic code Production systema
1 Catalunya 3000 A S1
2 Aragon 1200 A FTF
3 Catalunya 550 A FTF
4 Catalunya 3000 A S1
5 Catalunya 1000 A S1 + S2
6 Aragon 750 A S1 + S2
7 Catalunya 3500 A S1
8 Catalunya 1100 A S1
9 Aragon 550 A S1
10 Aragon 1080 A S1
11 Aragon 800 A S1
12 Aragon 550 A S1
13 Aragon 2800 B S1
14 Aragon 2580 A S1
15 Aragon 3000 B S1
16 Aragon 3000 B S1
17 Aragon 3500 B S1
18 Aragon 2300 C S1 + S2
19 Aragon 2400 C S1 + S2
20 Aragon 2800 B S1
21 Aragon 1200 A S1
22 Catalunya 3500 A S1
23 Aragon 2400 C S1
24 Aragon 3300 B S1
25 Aragon 2600 B S1
26 Navarra 2900 C S1 + S2
27 Navarra 2900 C S1 + S2
28 Aragon 3300 C S1
29 Aragon 620 C S1
30 Aragon 2800 D S1 + S2
31 Aragon 950 C S1 + S2
32 Aragon 3900 B S1
33 Aragon 3500 B S1
34 Navarra 2000 B S1
35 Aragon 1500 B S1
  1. aProduction system: S1: Breeding farm; S1 + S2: Breeding + Nursery farm; FTF: Farrow-to-Finish farm