Dilution of sera | Sera number |
---|
611 | 612 | 615 | 616 |
---|
| VNT | A | B | VNT | A | B | VNT | A | B | VNT | A | B |
---|
1:1 |
1:32
|
98
|
96
|
1:64
|
76
|
189
|
1:64
|
95
|
120
|
1:64
|
81
|
64
|
1:4 |
1:16
|
34
| 53 |
1:16
|
34
|
213
|
1:32
|
49
|
102
|
1:16
|
36
| 25 |
1:8 |
1:8
|
18
| 34 |
1:8
|
22
|
132
|
1:16
|
31
|
61
|
1:8
|
24
| 21 |
1:16 | 1:4 | 9 | 17 | 1:4 |
15
|
86
| 1:4 |
16
| 35 | <1:4 | 11 | 11 |
1:32 | <1:4 | 3 | 8 | <1:4 | 8 | 43 | <1:4 | 7 | 16 | 1:4 | 6 | −4 |
1:64 | <1:4 | 3 | 4 | <1:4 | 4 | 23 | <1:4 | 5 | 9 | <1:4 | 3 | 11 |
- Four out of the positive sera from France (see Table 1); serially diluted 1:4 to 1:64 in negative serum were analyzed in accordance with the protocol of each test. The sera and sera dilutions where further diluted 1:100 in ELISA A, 1:10 in ELISA B and serially diluted 1:4 to 1:256 in VNT. Bold-figures indicate positive results, under-lined figures doubtful results. Thresholds: VNT titer ≥1:8 = positive. ELISA A; S/P% ≥15 = positive, ELISA B; S/P ≥50-60 = doubtful, >60 = positive.