Table 2 Relationship between pre-existing VN titer against EHV-1 and its increase after vaccination
Period | Type of vaccine | Response | Response rate (no.) in horses with pre-vaccination VN titer of: | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
< 10 | 10 | 20 | 40 | 80 | 160 | 320 | 640 | Total no. | |||
2013–2014 | Inactivated | Significant increasea | 1 | 7 | 7 | 5 | 1 | 0 | 0 | 0 | 21 |
No increase | 0 | 1 | 4 | 5 | 9 | 7 | 3 | 0 | 29 | ||
Total no. | 1 | 8 | 11 | 10 | 10 | 7 | 3 | 0 | 50 | ||
2014–2015 | Live | Significant increase | 2 | 12 | 13 | 10 | 5 | 2 | 1 | 0 | 45 |
No increase | 0 | 0 | 0 | 0 | 1 | 3 | 1 | 0 | 5 | ||
Total no. | 2 | 12 | 13 | 10 | 6 | 5 | 2 | 0 | 50 | ||
2015–2016 | Live | Significant increase | 7 | 6 | 11 | 6 | 6 | 1 | 1 | 0 | 38 |
No increase | 0 | 0 | 0 | 0 | 3 | 3 | 4 | 2 | 12 | ||
Total no. | 7 | 6 | 11 | 6 | 9 | 4 | 5 | 2 | 50 | ||