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Int. J. Environ. Res. Public Health 2013, 10(10), 4869-4895; doi:10.3390/ijerph10104869

European Surveillance for West Nile Virus in Mosquito Populations

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Received: 15 August 2013 / Revised: 20 September 2013 / Accepted: 24 September 2013 / Published: 11 October 2013
(This article belongs to the Special Issue Epidemiology of West Nile Virus)
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Abstract: A wide range of arthropod-borne viruses threaten both human and animal health either through their presence in Europe or through risk of introduction. Prominent among these is West Nile virus (WNV), primarily an avian virus, which has caused multiple outbreaks associated with human and equine mortality. Endemic outbreaks of West Nile fever have been reported in Italy, Greece, France, Romania, Hungary, Russia and Spain, with further spread expected. Most outbreaks in Western Europe have been due to infection with WNV Lineage 1. In Eastern Europe WNV Lineage 2 has been responsible for human and bird mortality, particularly in Greece, which has experienced extensive outbreaks over three consecutive years. Italy has experienced co-circulation with both virus lineages. The ability to manage this threat in a cost-effective way is dependent on early detection. Targeted surveillance for pathogens within mosquito populations offers the ability to detect viruses prior to their emergence in livestock, equine species or human populations. In addition, it can establish a baseline of mosquito-borne virus activity and allow monitoring of change to this over time. Early detection offers the opportunity to raise disease awareness, initiate vector control and preventative vaccination, now available for horses, and encourage personal protection against mosquito bites. This would have major benefits through financial savings and reduction in equid morbidity/mortality. However, effective surveillance that predicts virus outbreaks is challenged by a range of factors including limited resources, variation in mosquito capture rates (too few or too many), difficulties in mosquito identification, often reliant on specialist entomologists, and the sensitive, rapid detection of viruses in mosquito pools. Surveillance for WNV and other arboviruses within mosquito populations varies between European countries in the extent and focus of the surveillance. This study reviews the current status of WNV in mosquito populations across Europe and how this is informing our understanding of virus epidemiology. Key findings such as detection of virus, presence of vector species and invasive mosquito species are summarized, and some of the difficulties encountered when applying a cost-effective surveillance programme are highlighted.
Keywords: West Nile virus; mosquito; surveillance; vector; invasive species West Nile virus; mosquito; surveillance; vector; invasive species
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Engler, O.; Savini, G.; Papa, A.; Figuerola, J.; Groschup, M.H.; Kampen, H.; Medlock, J.; Vaux, A.; Wilson, A.J.; Werner, D.; Jöst, H.; Goffredo, M.; Capelli, G.; Federici, V.; Tonolla, M.; Patocchi, N.; Flacio, E.; Portmann, J.; Rossi-Pedruzzi, A.; Mourelatos, S.; Ruiz, S.; Vázquez, A.; Calzolari, M.; Bonilauri, P.; Dottori, M.; Schaffner, F.; Mathis, A.; Johnson, N. European Surveillance for West Nile Virus in Mosquito Populations. Int. J. Environ. Res. Public Health 2013, 10, 4869-4895.

AMA Style

Engler O, Savini G, Papa A, Figuerola J, Groschup MH, Kampen H, Medlock J, Vaux A, Wilson AJ, Werner D, Jöst H, Goffredo M, Capelli G, Federici V, Tonolla M, Patocchi N, Flacio E, Portmann J, Rossi-Pedruzzi A, Mourelatos S, Ruiz S, Vázquez A, Calzolari M, Bonilauri P, Dottori M, Schaffner F, Mathis A, Johnson N. European Surveillance for West Nile Virus in Mosquito Populations. International Journal of Environmental Research and Public Health. 2013; 10(10):4869-4895.

Chicago/Turabian Style

Engler, Olivier; Savini, Giovanni; Papa, Anna; Figuerola, Jordi; Groschup, Martin H.; Kampen, Helge; Medlock, Jolyon; Vaux, Alexander; Wilson, Anthony J.; Werner, Doreen; Jöst, Hanna; Goffredo, Maria; Capelli, Gioia; Federici, Valentina; Tonolla, Mauro; Patocchi, Nicola; Flacio, Eleonora; Portmann, Jasmine; Rossi-Pedruzzi, Anya; Mourelatos, Spiros; Ruiz, Santiago; Vázquez, Ana; Calzolari, Mattia; Bonilauri, Paolo; Dottori, Michele; Schaffner, Francis; Mathis, Alexander; Johnson, Nicholas. 2013. "European Surveillance for West Nile Virus in Mosquito Populations." Int. J. Environ. Res. Public Health 10, no. 10: 4869-4895.

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