Lymphocytic choriomeningitis virus (LCMV), a member of the Arenaviridiae family of viruses, is a single-strand RNA virus carried by mice. Postnatal infection usually causes benign aseptic meningitis, although encephalitis, hydrocephalus, transverse myelitis, and even death, have been described. Sporadic cases of congenital LCMV infection have been recorded for over 50 years. Now 20 cases have been reported from …