Japanese encephalitis is a disease caused by the mosquito-borne Japanese encephalitis virus. Domestic pigs and wild birds (herons) are reservoirs of the virus; transmission to humans may cause severe symptoms. Amongst the most important vectors of this disease are the mosquitoes of the Culex group. This disease is most prevalent in Southeast Asia and East Asia.
West Nile virus (WNV) is a mosquito-borne zoonotic arbovirus belonging to the genus Flavivirus in the family Flaviviridae. This flavivirus is found in temperate and tropical regions of the world.
Detail of a painting by Werner Horvath.