Table 2.
EI clinical cases with known EI vaccination history: time since last vaccination and EIV-specific antibody responses (SRH and EIV NP ELISA) at the onset of clinical signs of disease: na = not applicable; nd = not done; neg = negative; pos = positive; V = last EI vaccine administered prior to EI outbreak; VT = vaccine type: C = EIV HA recombinant canarypoxvirus-based EI vaccine ProteqFlu (±Te), W1 = whole inactivated EI vaccine Equip FT, W2 = whole inactivated EI vaccine Equilis Prequenza; w = week.
| Horse ID | Time Since Last Vaccination (V) | V-1/VT (Months between V and V-1) |
V-2/VT (Months between V-1 and V-2) |
SRH (mm2) 1 | EIV NP ELISA DIVA |
Outbreak | |||
|---|---|---|---|---|---|---|---|---|---|
| Months | VT | Months | VT | Months | VT | ||||
| #1 | 1 | C | 9.5 | C | 7 | W1 | 115.9 1 | pos | #1 |
| #2 | 1 | W1 | 12 | C | 8.5 | C | nd | nd | #10 |
| #3 | 2 | C | 6 | C | 6 | C | 70.6 1 | neg | #1 |
| #4 | 2 | C | 6.5 | C | 1 | C | 74.05 1 | neg | #1 |
| #5 | 3 | C | 2 | C | 12 | C | 105.9 1 | neg | #1 |
| #6 | 3 | C | 11 | C | 6 | C | 177.2 2 | neg | #19 |
| #7 | 3.5 | C | 1 | C | na | na | 0 1 | borderline | #1 |
| #8 | 4 | C | 15 | C | 12 | C | 79.2 2 | neg | #19 |
| #9 | 6 | C | 12 | C | 11.5 | W2 | 66.9 1 | nd | #1 |
| #10 | 9 | C | 12 | C | 1.5 | C | 129.5 1 | neg | #1 |
| #11 | 9 | C | 11.5 | C | 6 | C | 93.9 2 | neg | #19 |
| #12 | 9.5 | C | 12 | C | 12 | C | nd | nd | #6 |
| #13 | 11 | C | 12 | C | 7 | C | 45.6 1 | neg | #1 |
| #14 | 19.5 | C | 12 | C | 12 | C | nd | nd | #6 |
1 serum samples taken <3 days after EI confirmation by qRT-PCR. 2 serum samples taken on the day of EI confirmation by qRT-PCR.