Serologic evidence for Schmallenberg virus circulation at high altitude, Central Portugal, 2015-2016

Transboundary and Emerging Diseases
Fernando EstevesJ R Mesquita

Abstract

A few years after the initial 2011 large scale Schmallenberg virus (SBV) epidemic that affected Europe, a subsequent decrease in new SBV infections was observed presumably associated with natural substitution of previously exposed animals. In the present work, a 2-year prospective serosurvey was performed to evaluate SBV circulation in a population of sheep living at high altitude in the central region of Portugal and with restricted movement. Blood from a representative sample of 168 autochthonous sheep was collected in 2015 and again in 2016, and tested for the presence of anti-SBV IgG by ELISA. Of the 2015 sample collection, seven animals tested positive for anti-SBV IgG, corresponding to a seroprevalence of 4.2% while of the 2016 sample collection, 10 presented SBV antibodies, showing a seroprevalence of 6.0% (p = 0.619). Results show that SBV is endemic in sheep of central Portugal, even in herds at high altitude locations. When comparing anti-SBV seroprevalences of 2015/2016 found in this study, to one detected in 2014 in the same region, a steep decrease could be observed (p < 0.001). This is in accordance with what has been documented in Western European countries, where a decrease in the number of SBV-infected sheep ha...Continue Reading

References

Mar 2, 2012·Emerging Infectious Diseases·Bernd HoffmannMartin Beer
Jun 20, 2012·Emerging Infectious Diseases·Lasse Dam RasmussenAnette Bøtner
May 27, 2014·Emerging Infectious Diseases·Xavier Fernández-AguilarOscar Cabezón
Aug 8, 2014·Transboundary and Emerging Diseases·V Rodríguez-PrietoJ Manuel Sánchez-Vizcaíno
Jan 16, 2016·Vector Borne and Zoonotic Diseases·Fernando EstevesMaria S J Nascimento
Jul 3, 2017·The Veterinary Journal·Anastasios StavrouRachael Tarlinton
Aug 17, 2017·PloS One·Ignacio García-BocanegraJoan Pujols

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Citations

Oct 10, 2020·Transboundary and Emerging Diseases·Débora Jiménez-MartínIgnacio García-Bocanegra
Oct 5, 2020·Transboundary and Emerging Diseases·Julia Kęsik-MaliszewskaMagdalena Larska

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