Click to Translate to English Click to Translate to French  Click to Translate to Spanish  Click to Translate to German  Click to Translate to Italian  Click to Translate to Japanese  Click to Translate to Chinese Simplified  Click to Translate to Korean  Click to Translate to Arabic  Click to Translate to Russian  Click to Translate to Portuguese


Forum Home Forum Home > General Discussion > Latest News
  New Posts New Posts RSS Feed - Another Bird Virus Jumps to Humans
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Online Discussion: Tracking new emerging diseases and the next pandemic; Now tracking the Aussie Flu.

Another Bird Virus Jumps to Humans

 Post Reply Post Reply
Author
Message
Technophobe View Drop Down
Senior Moderator
Senior Moderator
Avatar

Joined: January 16 2014
Location: Scotland
Status: Offline
Points: 31570
Post Options Post Options   Thanks (0) Thanks(0)   Quote Technophobe Quote  Post ReplyReply Direct Link To This Post Topic: Another Bird Virus Jumps to Humans
    Posted: October 13 2017 at 1:24pm
This is non fatal, though there would be a risk to immuno-compromised people:

Usutu virus is back – not only in blackbirds but also in humans

October 13, 2017
Usutu virus is back – not only in blackbirds but also in humans
Usutu-viruses not just infect birds, but also humans in a higher number than previously thought. Credit: Georg Mair/Vetmeduni Vienna

Usutu virus, a flavivirus of African origin, was first detected in Austria in 2001, when it caused a severe bird die-off, mainly of blackbirds. The virus was active in the eastern part of Austria until 2005, killing many blackbirds, but also other songbirds. During 10 subsequent years no Usutu virus associated bird mortality was observed in Austria – contrary to neighboring Hungary. Last year Usutu virus was identified again in two blackbirds – and in 2017 already in sixteen songbirds. A research team of the Vetmeduni Vienna investigated the virus strains involved. In another study Usutu virus was demonstrated in seven human blood donations from eastern Austria, suggesting that human infections seem to be more frequent than previously thought. Implications for blood services in Europe are discussed.

Between 2001 and 2005 the massive black bird mortality in eastern Austria received wide public attention. Usutu virus, the aetiological agent, belongs to the flavivirus family, together with tick-borne encephalitis-, West Nile- and Dengue viruses. Since then no Usutu virus associated bird mortality was observed in Austria, while in other European countries such as Hungary a small number of Usutu virus-positive wild birds was diagnosed in each year. The epidemiological situation changed significantly in 2016, when Usutu virus wild bird die-off was reported from various European countries including 12 cases from Hungary and two from Austria.

A team of researchers from the Vetmeduni Vienna investigated genetically the virus strains which circulated in Hungary since 2010 and in Austria in 2016. In 2014, the Austrian Red Cross, Blood Service for Vienna, Lower Austria and Burgenland, initiated regular screening of all blood donated between 1 June and 30 November each year for West Nile virus by a nucleic acid test. Interestingly, one positive sample in 2016 and six blood donations in 2017 turned out to be infected by Usutu virus and not by West Nile virus.

Old and new viruses circulate in Austria and Hungary

"We were surprised to see after 10 years of absence last year the reemergence of Usutu virus in Austria. Also other European countries reported last year widespread Usutu virus activity," says the principal investigator Norbert Nowotny from the Institute of Virology. "We therefore investigated the genetic set-up of the Austrian and Hungarian viruses in order to enhance our understanding which virus strains are currently active in the regions and from where they have been introduced." The viruses identified in Hungary between 2010 and 2015 were closely related to the "original" virus strain that was responsible for the blackbird die-off in Austria from 2001 to 2005. However, the viruses found in 2016 in both countries turned out to be related to virus strains which circulated in Italy during 2009 and 2010. These two virus variants belong to two different European genetic lineages. "This demonstrates that variousvirus strains are exchanged between neighboring countries," explains Nowotny.

Human Usutu virus infections are more prevalent than previously thought

Besides wild birds, humans can also be infected with Usutu virus through mosquito bites. Usually human Usutu virus infections are asymptomatic, occasionally they may result in fever and rash. Neurologic symptoms and severe courses of the disease are rare in humans, although critical illness was reported in immunosuppressed patients, e.g., in two cases in 2009 in Italy.

With increased Usutu virus activity in a region also the risk of human infections increases. Since West Nile virus, a well-known human pathogen, is endemic in the eastern part of Austria, all blood donations from that area have been tested for flavivirus nucleic acid since 2014. "Contrary to most other flavivirus infections Usutu is not considered a communicable disease. However, the employed diagnostic test detects essentially all flaviviruses, including Usutu virus," states Franz Allerberger from the Austrian Agency for Health and Food Safety (AGES). When retested with virus-specific assays, it turned out that seven blood donations were infected with Usutu virus and not with West Nile virus. None of the Usutu virus-positive blood donors reported clinical symptoms, and only one mentioned a stay abroad.

Testing donor blood prevents subsequent diseases

"Flavivirus-positive blood donations – both West Nile and Usutu virus positives – are discarded and consequently do not pose any risk to recipients of blood donations. However, there are a number of European countries, in which West Nile virus infections did not yet occur but in which Usutu virus circulates. In these countries blood donations may not be screened for flaviviruses. On the other hand, blood recipients are frequently immunocompromised persons, in which an Usutu virus infection may result in severe disease. To increase awareness of this possibility was one of the main goals of our second study," says Nowotny.

 Explore further: Forensic pathology: Tracing the origin of the Usutu Virus

More information: Tamás Bakonyi et al. Usutu virus infections among blood donors, Austria, July and August 2017 – Raising awareness for diagnostic challenges, Eurosurveillance (2017). DOI: 10.2807/1560-7917.ES.2017.22.41.17-00644 


Source:   https://medicalxpress.com/news/2017-10-usutu-virus-blackbirds-humans.html

Absence of proof is not proof of absence.
Back to Top
carbon20 View Drop Down
Admin Group
Admin Group


Joined: April 08 2006
Location: West Australia
Status: Offline
Points: 17696
Post Options Post Options   Thanks (0) Thanks(0)   Quote carbon20 Quote  Post ReplyReply Direct Link To This Post Posted: October 13 2017 at 2:42pm
lots of displaced People moving around,

dosnt look good for the future   Cry
12 monkeys!!!!!
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down