WNV >  Information for Healthcare Professionals > Basic points
Basic points
What is the West Nile virus?
WNV is classified as a member of the genus Flavivirus in the Flaviviridae family, which contains more than 70 viruses, with approximately 40 of them being human pathogens (e.g. Dengue fever viruses, tick-borne encephalitis virus, Japanese encephalitis virus, Yellow fever virus, etc.)

Where did it appear for the first time?
The virus was isolated -for the first time- from a febrile woman in 1937 in West Nile province in Uganda,.

How is it transmitted?
Transmission occurs mainly through infected mosquito bite. Less common ways of transmission are: solid organ transmplantation from an infected donor, blood transfusion, from a mother to her fetus, through breast feeding, through infected animals handling. It is not transmitted from human to human. It is not transmitted through social contant, cough droplets or sexual contact.

Which is the role of birds, equines and humans in the transmission cycle?
Birds are the reservoirs of the virus.
Humans and equines are dead-end hosts of the virus.

Which are the clinical manifestations of the disease in humans?
The disease runs usually subclinically without any symptom, but in a few cases it may cause Central Nervous System  symptoms/signs (encephalitis/meningitis).

Is there an effective primary preventive method?
No. There is not a vaccine for the protection of humans against the virus.

 Home  | Contact   | Sitemap   | Links 
This site has been produced for the needs of the "Integrated surveillance and control programme for West Nile virus and malaria in Greece” and represents the views of its authors. These views have not been adopted or in any way approved by the Special Service of Health & Social Solidarity and the European Commission and should not be construed as positions of the Special Service or the Commission. The Special Service does not guarantee the accuracy of the information contained on this website and does not have any responsibility for any use of this information.
Copyright 2012 - 2016 by malwest.gr