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Volume 18, Number 11—November 2012


Lack of Evidence for Zoonotic Transmission of Schmallenberg Virus

Chantal Reusken1Comments to Author , Cees van den Wijngaard1, Paul van Beek, Martin Beer, Ruth Bouwstra, Gert-Jan Godeke, Leslie Isken, Hans van den Kerkhof, Wilfrid van Pelt, Wim van der Poel, Johan Reimerink, Peter Schielen, Jonas Schmidt-Chanasit, Piet Vellema, Ankje de Vries, Inge Wouters, and Marion Koopmans
Author affiliations: National Institute for Public Health and the Environment, Bilthoven, the Netherlands (C. Reusken, C. van den Wijngaard, P. van Beek, G.-J. Godeke, L. Isken, H. van den Kerkhof, W. van Pelt, J. Reimerink, P. Schielen, A. de Vries, M. Koopmans); Friedrich-Loeffler-Institut, Insel Riems, Germany (M. Beer); Central Veterinary Institute of Wageningen University and Research Centre, Lelystad, the Netherlands (R. Bouwstra, W. van der Poel); Bernhard Nocht Institute for Tropical Medicine, Hamburg (J. Schmidt-Chanasit); Animal Health Service, Deventer, the Netherlands (P. Vellema); and Institute for Risk Assessment Sciences, Utrecht, the Netherlands (I. Wouters)

Main Article

Table 4

Characteristics of participating farms and number of human participants in study to determine whether SBV can be zoonotically transmitted, the Netherlands*

Animal species† No. farms (no. animals/farm) [median]) Laboratory-confirmed SBV infection in animals, no. (%)
No. human participants
PCR VNT PCR and/or VNT Total (no. per farm) No. (%) from farms with laboratory-confirmed SBV infection
Sheep 69 (5–1,676 [83]) 48 (70) 44 (64) 61 (88) 130 (1–6) 112 (86)
Goat 4 (4–1144 [759]) 1 (25) 2 (50) 2 (50) 8 (1–4) 2 (25)
Cattle 50 (23–468 [136]) 4 (8) 37 (74) 39 (78) 96 (1–5) 78 (81)
Total 123 53 (43)‡ 83 (68)§ 102 (83) 234 192 (82)

*A total of 240 farms were invited to participate in the study (113 sheep, 7 goat, and 120 cattle farms; all were highly suspected to be SBV infected on the basis of pathologic findings consistent with typical malformations in calves or lambs). 123 (51%) farms responded. SBV, Schmallenburg virus; VNT, virus neutralization test.
†Mixed farms were classified according to the main animal species.
‡For 9 farms, PCR results not available.
§For 38 farms, VNT results not available.

Main Article

1These authors contributed equally to this article.