Poliomyelitis cases in northern Greece during 1976-1990.

During the period 1976-1990 fourteen cases of paralytic poliomyelitis were recorded in Northern Greece, which has a total population of 2.5 million. Twelve wild strains of poliovirus type-1 were isolated from an equal number of children with paralytic disease from 1976 to 1982. Also, three Sabin-like poliovirus vaccine strains were isolated from two infants with paralytic disease. Since 1985 no paralytic cases have been reported in Northern Greece.