Table 1.
Herd | No. of sows | Production type | No. of colostral whey or serum samples | Time of eradication (month/year) | The follow-up serum samples after eradication | Notes | ||
positiveb | total | positiveb | total | |||||
Kar | 24 | B | 5 | 18 | - | - | - | finished all production turned to finishing herd resigned membership |
Lin | 15 | A | 18 | 28a | - | - | - | |
Mäk | 14 | A | 3 | 15a | - | - | - | |
Tuo | 28 | B | 11 | 24 | 9/98 | 0 | 20 | |
Pie | 48 | A | 4 | 30 | 12/98 | 0 | 20 | |
Hei | 50 | A | 9 | 28a | 4/99 | 0 | 25 | |
Rah | 46 | A | 25 | 30 | 4/99 | 0 | 30 | |
Mie | 30 | A | 5 | 15 | 5/99 | 0 | 15 | |
Mar | 25 | A | 8 | 10 | 5/99 | 0 | 20 | |
Kär | 19 | A | 4 | 15 | 5/99 | 0 | 20 | |
OjH | 30 | A | 11 | 20 | 6/99 | 0 | 10 | |
OjR | 30 | A | 8 | 16 | 6/99 | n.a. | n.a. | n.a. = not analysed |
Eur | 170 | A | 7 | 12a | 7/99 | 0 | 20 | |
Ant | 35 | A | 13 | 18 | 8/99 | 0 | 11 | |
Kej | 20 | A | 18 | 20 | 9/99 | 0 | 20 | |
Par | 25 | A | 9 | 11a | 9/99 | 0 | 11 | |
Vou | 38 | A | 8 | 21 | 9/99 | 0 | 15 | |
Meh | 26 | A | 13 | 19 | 12/99 | 0 | 10 | |
Oll | 10 | A | 6 | 15 | 12/99 | n.a. | n.a. | |
Pak | 12 | A | 6 | 10a | 12/99 | 0 | 16 | |
Ras | 60 | A | 5 | 23a | 12/99 | 0 | 11 | |
Ten | 25 | A | 14 | 29a | 12/99 | 0 | 10 | |
Tas | 20 | Ac | 8 | 15a | 9/00 | n.a. | n.a. | |
Aht | - | Cc | 8 | 10a | 6/00 | - | - | |
Tur | - | Cc | 7 | 7a | 7/00 | - | - | |
Vit | - | Cc | 1 | 7a | 7/00 | - | - | |
Kol | - | Cc | 9 | 15a | 11/00 | - | - |
All sow herds were screened for M. hyopneumoniae antibodies during 1998 and 1999. In addition, a survey of all pig herds was done in March 2000 based on randomly collected blood samples (n = 509) from slaughtered finishing pigs. Simultaneously, all type C herds were screened.
A = farrowing-to-finishing herd; B = farrowing herd; C = finishing herd practising continuous flow system a Serum samples b Corresponding to antibodies to M. hyopneumoniae by ELISA. c Indication of infection was found only during the survey or the screening of type C herds.