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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

From: Vaccination delays maedi-visna lentivirus infection in a naturally-infected sheep flock

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

  1. * 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.