Zoetis has announced the launch of Zulvac SBV, a new Schmallenberg vaccine licensed for use in cattle and sheep in two doses at a three week interval, the second at least two weeks before mating.
Zulvac SBV is licensed for use in cattle and sheep in two doses at a three week interval, the second at least two weeks before mating.
Duration of immunity is six months in cattle and seven in sheep. At the recommended vaccination timing, this covers the window of susceptibility during pregnancy; in sheep from day 28 to 56, and days 70 to 150 in cattle. Animals infected during these periods are at risk of malformed offspring and subsequent stillbirth.
The company says vaccination combined with insecticidal measures to control the midge vector remains the most effective way of protecting the population1 and ensuring a more unified level of immunity.
Zoetis vet Carolyn Hogan said: "Although SBV is now considered to be an enzootic pathogen in England and Wales, there is plenty of evidence that seroprevalence at farm level – particularly on sheep farms - varies. As immunity wanes, the proportion of herds and flocks naïve to SBV and at risk via introduction of naïve replacements increases. So the risk of reinfection in assumed enzootic areas is potentially underestimated2.
"Culicoides midges, the SBV vector, are widespread in Europe and move easily between farms and regions, allowing rapid spread of infection."
Carolyn says that whilst there have been no confirmed diagnoses of congenital abnormalities in calves or lambs from APHA in 2014 or 2015, unconfirmed anecdotal cases have been reported.
"We do not know whether our ruminant population is immune or susceptible and neither do we know if another SBV challenge will appear. Vaccination remains the most effective way of ensuring valuable livestock are protected."
Supplies are available immediately.
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