[The nature of virus strains isolated from patients with poliomyelitis in the Byelorussian SSR 1967-1985].

Oligonucleotide mapping of the RNA genome was applied for analysis of poliovirus clinical isolates in Byelorussia in 1967-1985. All the maps have been clearly shown to resemble the reference maps of the corresponding vaccine strains. Examination of the oligonucleotide maps of poliovirus isolates provides a measure of distribution of some of the mutations over the viral genome.