It is a single-stranded positive RNA virus (10,794-nt genome) that is closely related to the Spondweni virus
and is transmitted by many Aedes spp.
It is most closely related to the Spondweni virus
and is one of the two viruses in the Spondweni virus
Louis encephalitis virus, YFV, Powassan virus, Semliki Forest virus, o'nyong-nyong virus, chikungunya virus, and Spondweni virus
Arbovirus antigens were produced by sucrose-acetone extraction (21) of brains from newborn mice inoculated intracerebrally with the following arboviruses: CHIKV (Bill 4 strain), o'nyong-nyong virus (ONNV) (MP 30), yellow fever virus (17D), dengue 1 virus (Mochizuki strain), dengue 2 virus (New Guinea C), dengue 3 virus (H87), dengue 4 virus (H-241), West Nile virus (NY 385/99), and Spondweni virus