murid betaherpesvirus 1 murid betaherpesvirus 1 murid betaherpesvirus 1 (muhv-1) is a species of virus in the genus muromegalovirus, subfamily betaherpesvirinae, family herpesviridae, and order herpesvirales. murid betaherpesvirus 1 virus classification (unranked): virus realm: duplodnaviria kingdom: heunggongvirae phylum: peploviricota class: herviviricetes order: herpesvirales family: herpesviridae genus: muromegalovirus species: murid betaherpesvirus 1