Mousepox

Ectromelia virus
Virus classification
Group:	Group I (dsDNA)
Order:	Unassigned
Family:	Poxviridae
Subfamily:	Chordopoxvirinae
Genus:	Orthopoxvirus
Type species
Vaccinia virus
Species
Ectromelia virus

Ectromelia virus

Ectromelia virus (ECTV) is a virus of the family Poxviridae and the genus Orthopoxvirus that causes mousepox, a disease of mice. It has only been seen in mouse colonies kept for research purposes. Mousepox causes skin lesions and generalized disease, which can be fatal. It is the only poxvirus to cause disease naturally in mice.

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Wikipedia