| low usutu virus seroprevalence in four zoological gardens in central europe. | usutu virus (usuv), a mosquito-borne flavivirus of the japanese encephalitis virus antigenic group, caused bird die-offs in austria, hungary and switzerland between 2001 and 2009. while the zoological gardens of vienna and zurich recorded usuv-associated mortality in different species of birds during this period, incidences in budapest were limited to areas outside the zoo, and in the greater basel area avian mortality due to usuv infection was not observed at all. the objectives of this investi ... | 2013 | 23919825 |