Friend murine leukemia virus

**Definition:** A strain of Murine leukemia virus (LEUKEMIA VIRUS, MURINE) producing leukemia of the reticulum-cell type with massive infiltration of liver, spleen, and bone marrow. It infects DBA/2 and Swiss mice.

**Tree numbers:** - B04.613.807.375.525.225 - B04.820.650.375.525.225

**Synonyms:** - Friend Virus - Rowson-Parr Virus