Molecular epidemiological features of the Coxsackievirus A10 circulation in the Far Eastern Federal District of Russia

Background. Increase in incidence rates of enterovirus infections in the Far Eastern Federal District of Russia is observed annually. There is a wide genetic diversity of circulating non-polio enteroviruses. Some of them have been constantly identified for a number of years in the population of the district, including the Coxsackie A10 virus.Purpose. To study the features of the Coxsackievirus A10 circulation in the Far Eastern Federal District of Russia in 2014–2018.Methods. For this work, 117 Coxsackievirus A10 complete sequences of the VP1 gene were used, which were isolated in the Far Eastern Federal District of Russia in 2014–2018.Results. Phylogenetic analysis revealed two Coxsackievirus A10 lineages in the Far Eastern Federal District of Russia in 2014-2018, while their simultaneous circulation was noted in the Sakhalin region in 2017. Active population migration contributes to the widespread distribution of Coxsackievirus A10 in border areas with the formation of epidemic variants.Conclusion. Coxsackievirus A10 is one of the most relevant types of non-polio enteroviruses for the Far Eastern Federal District of Russia. Phylogenetic analysis revealed its genetic diversity and suggested both European and Asian origin of the obtained strains.