So far, eight infections with West Nile virus in humans and six infections in animals (three wild birds, three horses) have been confirmed in eastern Austria. Further suspected cases are still being investigated. As part of our monitoring programme, we have already tested several thousand mosquitoes for West Nile virus this year. So far, the virus has not been detected in any mosquito.
The West Nile virus is transmitted to humans and animals by mosquitoes. The disease caused by the virus is called West Nile fever. 80 % of infections are asymptomatic. 20 % of infected patients show a flu-like illness with sudden, high fever, muscle aches and headaches and possibly swelling of the lymph nodes and skin patches. In individual cases, West Nile encephalitis occurs: Clouding of consciousness, coordination disorders, difficulty swallowing, extreme tiredness and dizziness combined with behavioural and personality changes are typical signs. Immunocompromised patients and people over the age of 50 have a higher risk of developing the severe form of the disease.
There is no vaccine for humans. Avoiding gel bites is the easiest way to prevent infection.
Several authorised vaccines are available for horses. Regular booster vaccinations are necessary. In clinically ill horses, the infection is fatal in up to 40% of animals. Common symptoms of West Nile virus infection are fever, lethargy, head propping, weakness of the hindquarters, general muscle weakness, loss of appetite, visual disturbances and paralysis.
More information on West Nile Virus
AGES animal disease radar