The Maedi Visna virus (MVV) can cause chronic mastitis, several studies have reported an association between presence of MVV in a flock and mastitis. There is a blood test to check whether MVV is present in a flock, if it is then the impact on ewe health is considerable.
Test for Maedi visna virus in your flock
To reduce the risk of MVV:
- Avoid buying in replacements
- Test replacements before purchase or buy from a flock where the seller certifies that the flock is free from maedi visna.