Abstract
Noroviruses are the leading etiologic cause of outbreaks and sporadic cases of acute gastroenteritis worldwide. The objective of research was to study the genotypes of noroviruses, that caused outbreaks and sporadic incidence of norovirus infection in the Khabarovsk region in 2015-2018. The analysis of outbreaks due to norovirus infection in the Khabarovsk Region in 2015-2018 was performed. The molecular genetic study of samples from 60 patients from three norovirus outbreaks in the Khabarovsk Region and from 164 children with sporadic acute gastroenteritis in Khabarovsk region was performed. Genotype of noroviruses was determined by sequencing method, phylogenetic analysis of the obtained nucleotide sequences was carried out. The norovirus genotypes GII.17, GII.4 Sydney_2012 and GII.6 had caused the outbreaks of norovirus infection in the Khabarovsk region in 2015-2018. Sporadic cases of acute gastroenteritis in children in Khabarovsk in 2016 were due to GII.4 Sydney_2012, GII.3 and GII.6 norovirus genotypes. Detection of the GII.4 Sydney_2012 strain in both outbreaks and sporadic norovirus infection cases in the Khabarovsk region in 2016 evidenced of active circulation of this variant type during this period. The genotype GII.6 had been identified in Khabarovsk from 2016 to 2018.
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