Table 2.
Results from BVDV and BHV-1 antibody analysis by indirect ELISA on sera from all animals older than 6 months in 11 dairy herds in the Khon Kaen province, Thailand, 2000–2001.
| Herd | Total | |||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | ||
| Number of animals | 34 | 19 | 37 | 31 | 23 | 26 | 29 | 40 | 41 | 38 | 33 | 351 |
| No. of BVDV positive* | 4 | 2 | 5 | 4 | 3 | 8 | 2 | 22 | 11 | 20 | 2 | 83 |
| Prevalence (%) | 12 | 11 | 14 | 13 | 13 | 31 | 7 | 55 | 27 | 53 | 6 | 24** |
| No. of BHV-1 positive* | 2 | 2 | 5 | 3 | 3 | 1 | 0 | 2 | 0 | 0 | 0 | 18 |
| Prevalence (%) | 6 | 11 | 14 | 10 | 13 | 4 | 0 | 5 | 0 | 0 | 0 | 5** |
* Sera with CODs ≥ 0.20 were interpreted as seropositive ** i.e. mean prevalence within the eleven herds