The Molluscum contagiosum virus, MCV, is a virus, in the poxvirus family, that causes the disease Molluscum contagiosum in humans. The virions have a complex structure that is consistent with the structure of the poxvirus family.
Since the virus cannot routinely be cultured diagnosis is made on the clinical appearance. It can be confirmed by excisional biopsy. There are four types of MCV and MCV-2 is usually seen in adults and is often sexually transmitted.