While the number of confirmed cases of Schmallenberg virus (SBV) remains quite low, this contrasts with anecdotal evidence from farms, which suggests that the virus has been prevalent in early lambing flocks this year, particularly in the west and south of the country.

On cattle farms, given that cows are at risk in the third to fifth month of pregnancy, it might be later this month before cases emerge in calves.

A vaccine is available, manufactured by Zoetis. However, it is understood that the use-by date on current stocks is this summer. Given the low uptake of the vaccine in recent years, unless farmers show an increased appetite to use the product now, Zoetis might not make new stocks.

In sheep, 1ml of the vaccine should be administered in one shot, at least 14 days prior to breeding. It offers protection for up to six months. The cost is around £2.40 per dose. In cattle, two shots (2ml each time) are required, three weeks apart, and will protect for 12 months.

Schmallenberg strikes the west

Schmallenberg vaccine could be lost

Unless demand for the vaccine increases it could be taken off the market.