Generalised Coxsackie A9 infection in a neonate presenting with pericarditis.

Coxsackie A9 virus was isolated from a neonate presenting with a massive pericardial effusion. Delivery had occurred after maternal infection. The virus was cultured from the cerebrospinal fluid, urine, and faeces of the infant and from the faeces of the mother and a sibling. Despite signs of generalised infection with pericarditis, meningitis, pneumonitis, and hepatitis, recovery was complete.