Transmission of the virus (SBV) Stéphan Zientara UMR 1161 ANSES/INRA/ENVA

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1 Transmission of the virus (SBV) Stéphan Zientara UMR 1161 ANSES/INRA/ENVA April 2, 2012

2 Transmission routes Direct transmission Vertical transmission Insect transmission

3 Detection of Schmallenberg virus genome in the blood of experimentally infected calves. The highest genome copy number was detected on postinoculation day 4. BERND HOFFMANN1, MATTHIAS SCHEUCH1, DIRK HÖPER, RALF JUNGBLUT, MARK HOLSTEG, HORST SCHIRRMEIER, MICHAEL ESCHBAUMER, KATJA V. GOLLER, KERSTIN WERNIKE, MELINA FISCHER, ANGELE BREITHAUPT, THOMAS C. METTENLEITER, AND MARTIN BEER Novel Orthobunyavirus in Cattle, Europe, Emerg infectious Dis. 18 (3),

4 Martin Beer, FLI

5 Transmission routes Direct transmission Vertical transmission Insect transmission

6 Clinical signs: First french outbreak of SBV in Moselle general appearance: Stiff neck Arthrogryposis Shortening of tendon hocks

7 Clinical signs: sero-haemorrhagic liquid, abundant during decerebration Haemorrhagic sinus Head and jaw deformations Sabine Pelzer Malzeville, France

8 Guillaume Belbis, ENVA

9 JM Sanchez-Vizcaino Culicoides spp. resource Viremia 2-5 days ±150 days ±150 days ±280 days ±280 days Simbu days Simbu days NERVES MUSCLES CONGENITAL ABNORMALITIES

10 Martin Beer, FLI

11 Transmission routes Direct transmission Vertical transmission Insect transmission

12 Vectors of the Bunyaviridae Orthobunyavirus Californie / Bunyamwera Simbu Nairovirus Tique Culicoïdes Aedes Phlebovirus Sandfly Tick Schmallenberg Hantavirus Phlébotome Culex Tique HFSR HPS Aedes Tospovirus Sigmondontinae Campagnol Murinae Thrips Thrips Puceron

13 Simbu serogroup viruses Entomology (culicoides) Shamonda Japan: C.spp (unspecified) Nigeria: C. imicola Aino Japan C. oxystoma, C. punctatus Akabane Oman, Israel, S.Africa: C. imicola Zimbabwe : C. milnei Australië C. brevitarsis, C. wadei Japan: C. oxystoma, C. arakawae, C. punctatus, C.sumatrae, C. Lunchiensis

14 Culicoides obsoletus Culicoides pulicaris Culicoides dewulfi

15 oin Belgium, Culicoides spp. have been monitored since 2007 through a surveillance program financed by the Belgian Federal Agency for the Safety of the Food Chain (FAVV-AFSCA). 28/03/2012 B Cay, CODA-CERVA15

16 o Midges captured by scientists of the Institute of Tropical Medicine (ITM, Antwerp) : in September and October 2011 with an UV light trap In Betekom (Province of Vlaams Brabant, Belgium) Identified morphologically at species level each identified morphologically at species level Reginald De Deken, Isra Deblauwe, Pieter 28/03/2012 Vantieghem, Maxime Madder, Dirk Geysen 16

17 Trapping - Identification 17

18 Captures screening and identification Photos JC Delécolle (ULP) 18

19 o Pools of 10 heads of culicoides analysed by scientists of CODA-CERVA : by RT-qPCRs detecting S and L segments of SBV according to protocols provided by FLI, Germany Positive result of one pool consisting of _C. obsoletus s.s._ caught on 7 Sep 2011 Another positive pool consisted of _C. Dewulfi_ caught on 4 Oct positive pools of the 23 pools analysed B Cay, CODA-CERVA 28/03/

20 Identification based on wing patterns Reginald De Deken, Isra Deblauwe, Pieter Vantieghem, Maxime Madder, Dirk Geysen 28/03/

21 Reginald De Deken, Isra Deblauwe, Pieter Vantieghem, Maxime Madder, Dirk Geysen 28/03/

22 Detection of Schmallenberg virus in Belgium C. obsoletus s.s C. Dewulfi Denmark midges, March 2012 Undefined midges captured in Oct 2011 W Van der Poel, CVI

23 Acknowledgements Martin Beer, FLI, Germany Bernd Hoffmann, FLI, Germany Franz Conraths, FLI, Germany Jose-Manuel Sanchez-Vixcaino, UCM, Spain Wim Van der Poel, CVI, The Netherlands Brigitte Cay, Nick De Regge, Thierry van den Berg Veterinary and Agrochemical Research Centre Belgium Reginald De Deken, Isra Deblauwe, Pieter Vantieghem, Maxime Madder, Dirk Geysen Institute of Tropical Medicine Antwerp Belgium

24 Thank you for your attention

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