Forum für Wissenschaft, Industrie und Wirtschaft

Hauptsponsoren:     3M 
Datenbankrecherche:

 

Did wild birds cause the 2010 deadly West Nile virus outbreak in Greece?

12.11.2012
In 2010, 35 people in Greece died from a West Nile virus (WNV) outbreak, with a further 262 laboratory-confirmed human cases. A new article published in BioMedCentral's open access journal Virology Journal examines whether wild or migratory birds could have been responsible for importing and amplifying the deadly virus.

WNV is a flavivirus of major public health concern, spread through the bite of infected mosquitoes. Discovered in Uganda in 1937, it was only sporadically reported up until the 1990s, after which disease outbreaks were reported world-over, leading to WNV being given epidemic status.

Studies have shown that humans infected with WNV do not have viremia levels high enough to infect new mosquitoes and hence pass on the virus. Birds, however, do develop viremia levels sufficient to infect mosquitoes, hence serving as amplifying hosts for WNV.

In order to investigate whether wild birds were exposed to WNV prior to the 2010 outbreak in Greece, Charalambos Billinis and his co-authors tested serum and tissue samples from 295 resident and migratory wild birds harvested by hunters prior to and during the outbreak. These samples were collected for the purposes of the authors' participation in an FP7 EU wildlife diseases research project ("WildTech").

All sampling sites were in flying distance for avian species. Using immunofluorescence assays and virus neutralization tests to analyze samples for the presence of WNV-specific antibodies, the authors found 53 avian samples with WNV neutralizing antibodies. Importantly, 14 positive serum samples were obtained from birds up to 8 months prior to the human outbreak, and genetic determinants of increased virulence were present in these samples.

These results provide evidence to implicate that wild birds could have allowed WNV maintenance and amplification before and during the 2010 virus outbreak. Lead author Billinis commented, "The finding that migratory birds were previously exposed to WNV prior to their arrival in Greece during autumn migration suggests that avian species with similar migration traits could have introduced the virus into Greece."

The newly appointed editor in chief of the journal, Professor Linfa Wang, said, "This study shows the importance of wild bird surveillance for zoonotic diseases such as West Nile virus. It also demonstrates that pre-emergence surveillance in wildlife can be a powerful tool as part of an effective pre-warning system to prevent and/or reduce the impact of emerging zoonotic diseases. It is a great example of the need for a One Health approach to combat emerging infectious diseases."

Wildlife surveillance systems put in place could possibly provide timely information regarding virus introduction and circulation, further dispersion or introduction of new strains.

Notes

1. Serological and Molecular Investigation into the Role of Wild Birds in the Epidemiology of West Nile Virus in Greece
George Valiakos, Antonia Touloudi, Labrini V Athanasiou, Alexios Giannakopoulos, Christos Iacovakis, Periklis Birtsas, Vassiliki Spyrou, Zisis Dalabiras, Liljana Petrovska and Charalambos Billinis

Virology Journal (in press)

Please name the journal in any story you write. If you are writing for the web, please link to the article. All articles are available free of charge, according to BioMed Central's open access policy.

Article citation and URL available on request on the day of publication.

1. Virology Journal is an open access, peer reviewed journal that considers articles on all aspects of virology, including research on the viruses of animals, plants and microbes. The journal welcomes basic research as well as pre-clinical and clinical studies of novel diagnostic tools, vaccines and anti-viral therapies.

2. BioMed Central is an STM (Science, Technology and Medicine) publisher which has pioneered the open access publishing model. All peer-reviewed research articles published by BioMed Central are made immediately and freely accessible online, and are licensed to allow redistribution and reuse. BioMed Central is part of Springer Science+Business Media, a leading global publisher in the STM sector. @BioMedCentral

Hilary Glover | EurekAlert!
Further information:
http://www.biomedcentral.com

More articles from Life Sciences:

nachricht Discovery of a fundamental limit to the evolution of the genetic code
03.05.2016 | Institute for Research in Biomedicine (IRB Barcelona)

nachricht Perfect imperfection
03.05.2016 | Christian-Albrechts-Universität zu Kiel

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Erste Filmaufnahmen von Kernporen

Mithilfe eines extrem schnellen und präzisen Rasterkraftmikroskops haben Forscher der Universität Basel erstmals «lebendige» Kernporenkomplexe bei der Arbeit gefilmt. Kernporen sind molekulare Maschinen, die den Verkehr in und aus dem Zellkern kontrollieren. In ihrem kürzlich in «Nature Nanotechnology» publizierten Artikel erklären die Forscher, wie bewegliche «Tentakeln» in der Pore die Passage von unerwünschten Molekülen verhindern.

Das Rasterkraftmikroskop (AFM) ist kein Mikroskop zum Durchschauen. Es tastet wie ein Blinder mit seinen Fingern die Oberflächen mit einer extrem feinen Spitze...

Im Focus: Nuclear Pores Captured on Film

Using an ultra fast-scanning atomic force microscope, a team of researchers from the University of Basel has filmed “living” nuclear pore complexes at work for the first time. Nuclear pores are molecular machines that control the traffic entering or exiting the cell nucleus. In their article published in Nature Nanotechnology, the researchers explain how the passage of unwanted molecules is prevented by rapidly moving molecular “tentacles” inside the pore.

Using high-speed AFM, Roderick Lim, Argovia Professor at the Biozentrum and the Swiss Nanoscience Institute of the University of Basel, has not only directly...

Im Focus: 2+1 ist nicht immer 3 - In der Mikro-Welt macht Einigkeit nicht immer stark

Wenn jemand ein liegengebliebenes Auto alleine schiebt, gibt es einen bestimmten Effekt. Wenn eine zweite Person hilft, ist das Ergebnis die Summe der Kräfte der beiden. Wenn zwei kleine Teilchen allerdings ein weiteres kleines Teilchen anschieben, ist der daraus resultierende Effekt nicht notwendigerweise die Summe ihrer Kräfte. Eine kürzlich in Nature Communications veröffentlichte Studie hat diesen merkwürdigen Effekt beschrieben, den Wissenschaftler als „Vielteilchen-Effekt“ bezeichnen.

 

Im Focus: 2+1 is Not Always 3 - In the microworld unity is not always strength

If a person pushes a broken-down car alone, there is a certain effect. If another person helps, the result is the sum of their efforts. If two micro-particles are pushing another microparticle, however, the resulting effect may not necessarily be the sum their efforts. A recent study published in Nature Communications, measured this odd effect that scientists call “many body.”

In the microscopic world, where the modern miniaturized machines at the new frontiers of technology operate, as long as we are in the presence of two...

Im Focus: Winzige Mikroroboter, die Wasser reinigen können

Forscher des Max-Planck-Institutes Stuttgart haben winzige „Mikroroboter“ mit Eigenantrieb entwickelt, die Blei aus kontaminiertem Wasser entfernen oder organische Verschmutzungen abbauen können.

In Zusammenarbeit mit Kollegen in Barcelona und Singapur verwendete die Gruppe von Samuel Sánchez Graphenoxid zur Herstellung ihrer Motoren im Mikromaßstab. D

Alle Focus-News des Innovations-reports >>>

Anzeige

Anzeige

IHR
JOB & KARRIERE
SERVICE
im innovations-report
in Kooperation mit academics
Veranstaltungen

UFW-Fachtagung im Vorzeichen von Big Data und Industrie 4.0

03.05.2016 | Veranstaltungen

analytica conference 2016 in München - Foodomics, mehr als nur ein Modebegriff?

03.05.2016 | Veranstaltungen

Diabetes Kongress 2016: Diabetes schädigt das Herzkreislauf-System

02.05.2016 | Veranstaltungen

 
B2B-VideoLinks
Weitere VideoLinks >>>
Aktuelle Beiträge

Hepatitis C-Virus missbraucht den Fettstoffwechsel der Leber

03.05.2016 | Biowissenschaften Chemie

UFW-Fachtagung im Vorzeichen von Big Data und Industrie 4.0

03.05.2016 | Veranstaltungsnachrichten

Ein starkes Team: B2RUN und moove bringen Firmen in Bewegung

03.05.2016 | Unternehmensmeldung