[The Siberian and Far-Eastern subtypes of tick-borne encephalitis virus registered in Russia's Asian regions: genetic and antigen characteristics of the strains].

Agar gel precipitation test with cross-adsorbed immune sera was used for the antigenic differentiation of strains of tick-borne encephalitis virus (TBEV). Fifty strains of the Far East TBEV serotype and 46 strains of the Siberian (Aina) TBEV serotype were isolated from Ixodes persulcatus, which is the main vector of the above TBEV subtypes in the Asian and European parts of Russia. The fragment of the envelope protein gene was sequenced for TBEV strains.

[The geographical spread of enterovirus uveitis in the USSR].

Enteroviral uveitis is accompanied by intensive and long-term production of specific neutralizing antibodies. The antibody titer to the causative virus ECHO 19/K (Siberia, Krasnoyarsk, 1980-1981) was 1:1000-1:65,000 in 80% of children 5 to 6 1/2 years after the illness. In retrospective examinations of blood sera from children with the history of uveitis using a neutralization test with ophthalmotropic strains of ECHO 19 and ECHO 11 viruses, the ECHO-virus etiology of this disease was first established in 80 patients living in the European part of the country (Moscow, Leningrad, Volgograd, Krasnodar, Donetsk, etc) and in the Caucasus (Yerevan, Tbilisi, Baku).