“…21 from the Cooperative Antiviral Testing Group of the National Institute of Allergy and Infectious Disease, Bethesda, Md. rological sequelae after symptomatic congenital infection, several workers have attempted to treat these infections with either cytosine arabinoside (ara-C) (3,13,15,21) or 5-iodo-2'-deoxyuridine (IUdR) (1), both of which have been shown to inhibit the replication of HCMV in vitro (22,23). Although treatment has resulted in decreased urinary excretion of virus (13,15), clinical improvement has been difficult to evaluate, and there has been no definitive evidence that the development of neurological residua was altered. Furthermore, information regarding success or failure of therapy has been obtained from individually treated cases.…”