RESUMO
AIM: Studies of cultural, virologic, antigenic properties of 89 samples of pandemic influenza A(H1N1) 2009 virus isolated in Russian Federation from May 2009 to March 2010. MATERIALS AND METHODS: Properties of isolated samples were compared with those of the reference strain A/ California/04/2009 (H1N1). RESULTS: Studies of biological properties and analysis of genome nucleotide sequences of the isolated samples showed that those strains are closely related to the reference strain. CONCLUSION: Monitoring of genetic, virologic and antigenic properties of pandemic influenza A(H1N1) 2009 virus isolates carried out from May 2009 to March 2010 did not reveal significant changes in the abovementioned properties of the virus or emergence of mutations that can lead to such changes.
