[The electrophoretic typing of rotaviruses in the clinico-epidemiological study of infection].
The electrophoretic study of the RNA of human rotavirus strains (1146 strains) circulating in 9 cities at the territory of the European part of the RSFSR was carried out. The electrophoretic (EP) types of rotavirus were established in each individual area. The study revealed that the most widespread rotaviruses responsible for the majority of gastroenteritis cases are those with the long EP type of RNA, characterized by the joint migration of segments 2, 3 and 7 (the 3rd EP type of RNA). Rotaviruses with the 3rd EP type of RNA much more often induce a severe course of rotavirus gastroenteritis in children aged 8 months to 3 years.