Table 1.
Results from BVDV and BHV-1 antibody analysis by indirect ELISA on 220 bulk milk samples collected at 9 public milk centres in northeastern (1–7) and northern (8–9) Thailand, 2000–2001.
| Milk centre | |||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| Number of herds | 11 | 40 | 24 | 20 | 20 | 19 | 17 | 25 | 44 |
| No. of BVDV positive* | 11 | 36 | 22 | 19 | 14 | 17 | 15 | 20 | 6 |
| Prevalence (%) | 100 | 90 | 92 | 95 | 70 | 90 | 88 | 80 | 14 |
| No. of BHV1 positive* | 8 | 35 | 22 | 17 | 13 | 10 | 17 | 24 | 1 |
| Prevalence (%) | 73 | 88 | 92 | 85 | 65 | 53 | 100 | 96 | 2 |
* Herds with CODs ≥ 0.05 were considered antibody positive according to the Swedish BVDV and BHV-1 control programmes.