Virus-like particles induced by bromodeoxyuridine in melanoma and neuroblastoma of xiphophorus

Abstract
5-Bromodeoxyuridine (BrdUrd) injected into the muscular tissue of fish bearing melanoma or neuroblastoma induces the production of virus-like particles in these tumors. The particles in the melanoma are morphologically similar to papovaviruses of polyoma-type, those in the neuroblastoma resemble oncornavirouses of B- and C-type.