Seroprevalence of Schmallenberg Virus Antibodies among Dairy Cattle, the Netherlands, Winter 2011-2012

Elbers, A.R.; Loeffen, W.L.A.; Quak, J.; Boer-Luijtze, E.A. de; Spek, A.N. van der; Bouwstra, R.J.; Maas, H.A.; Spierenburg, M.A.H.; Kluijver, E.P. de; Schaik, G. van; Poel, W.H.M. van der


Infections with Schmallenberg virus (SBV) are associated with congenital malformations in ruminants. Because reporting of suspected cases only could underestimate the true rate of infection, we conducted a seroprevalence study in the Netherlands to detect past exposure to SBV among dairy cattle. A total of 1,123 serum samples collected from cattle during November 2011–January 2012 were tested for antibodies against SBV by using a virus neutralization test; seroprevalence was 72.5%. Seroprevalence was significantly higher in the central-eastern part of the Netherlands than in the northern and southern regions (p