Arenaviruses, Old World

**Definition:** One of two groups of viruses in the ARENAVIRUS genus and considered part of the Old World complex. It includes LASSA VIRUS and LYMPHOCYTIC CHORIOMENINGITIS VIRUS, although the latter has worldwide distribution now.

**Tree numbers:** - B04.820.480.500.070.100

**Synonyms:** - Lymphocytic Choriomeningitis-Lassa Complex Viruses - LCM-Lassa Complex Viruses - Old World Arenaviruses