Mengovirus is serotypically related cardioviruses of the picornavirus family. Have positive-sense single-stranded RNA. The Mengovirus is a non-enveloped virus which has a nucleocapsid made up of 12 subunits. The virion displays icosahedral symmetry. Mengovirus is infectious to vertebrate animals, and has been isolated from mice and other rodents. It can also cause acute fever in humans. There is no specific treatment for a Mengovirus infection.