Nodule-Inducing Virus

**Semantic type:** Virus

**Definition:** An exogenous, infectious mouse mammary tumor virus isolated from BALB/cNIV/Crgl mice, thought to be derived from the endogenous low oncogenic mouse mammary tumor virus found in C3Hf mice. (from Cancer Res. 1984 Oct;44(10):4333-6)

**Synonyms:** - NIV