Table 1.
Comparison of CF titers against 3 Maedi-Visna strains, vaccine strain K796 and 2 local strains 10B and 7W from 2 sheep of the flock in Cyprus
| Titer of serum from one sheep infected intrapulmonarily with 300.000 TCID 50 of virus K796 |
Virus strains |
||
|---|---|---|---|
| K796 | 10B | 7W | |
|
Serum 13 months after infection with K796 |
128 |
16 |
8 |
|
Serum 3 years after infection with K796 |
256 |
32 |
16 |
| Titer of serum from one naturally infected sheep in Cyprus | 16 | 128 | 128 |
* In these CF tests serial 2 fold dilutions of sera ranging from dilutions 1/4 - 1/512 were tested against the 3 strains. Four-fold or larger difference in titer is significant.