Fatal echovirus type 7 in a premature infant.

Echovirus 7 infections have not been previously recognized as fatal in neonates. A premature male member of a twin gestation developed an echovirus 7 infection at 5 days of age and succumbed to it. The clinical manifestations were similar to an echovirus 11 infection described in neonates. The second twin was free of illness as well as of virus shedding.