[Circulation of cytopathogenic enteric viruses in Lombardy 7 years after the introduction of vaccination against poliomyelitis with the Sabin vaccine].

The Author has studied the circulation of enteric cytopathogenic viruses in Lombardy in 1971, seven years after the mass vaccination campaign with Sabin vaccine. The incidence of such viruses has already been studied in the same area in 1964-1965-1967 and in 1971. The present survey demonstrated the constant rate of non polio viruses. On the contrary no heterologous poliovirus were isolated.