Table 2.
Statistical relation between the results of BoHV-2 serology in relation to the respective results in BoHV-1 ELISAs for animals (a) and farms (b)
| a Individual animal level | ||||
| BoHV-2 seropositive animals (n = 375) | BoHV-2 seronegative animals (n = 6426) | ORa(CI 95%) | p-value | |
| BoHV-1 ELISA negative animals | 312 | 6343 | 1.00 | – |
| Trachitest-positive animals | 30 | 60 | 10.71 (6.46–15.99) | < 0.001 |
| Non-negative animals | 33 | 23 | 29.17 (16.92–50.27) | < 0.001 |
| b Farm level | ||||
| BoHV-2 seropositive farmsb(n = 78) | BoHV-2 seronegative farmsc(n = 328) | ORa(CI 95%) | p-value | |
| BoHV-1 ELISA negative farmsd | 36 | 278 | 1.00 | – |
| Trachitest-positive farmse | 15 | 37 | 3.13 (1.57–6.26) | < 0.001 |
| Non-negative farmsf | 27 | 13 | 16.04 (7.60–33.86) | < 0.001 |
aOdds Ratios
bfarms are classified as BoHV-2 seropositive when at least one BoHV-2 seropositive animal is kept
cfarms are classified as BoHV-2 seronegative when none of the tested animals had antibodies against BoHV-2
dfarms are classified as BoHV-1 ELISA negative when none of the tested sera showed reactivity in the Trachitest
efarms are classified as Trachitest-positive when at least one animal with reactivity in the Trachitest but none with reactivity in the gB-ELISA is kept
ffarms are classified as non-negative when at least one animal with reactivity in the Trachitest and the gB-ELISA (gE-ELISA negative) is kept