ЭТИОЛОГИЧЕСКАЯ СТРУКТУРА ЭНТЕРОВИРУСНЫХ ИНФЕКЦИЙ В РОССИЙСКОЙ ФЕДЕРАЦИИ В 2017–2018 ГГ.

Abstract

Type of enterovirus was detected in 2753 cases when examining 4122 patients with various clinical forms of enterovirus infection (EVI) during the 2017-2018 period. We identified viruses of 42 types belonging to Enterovirus A-B-С species. The ratio of EV-A: EV-B: EV-C species was 51.29 percent: 47.06 percent: 1.65 percent. In 413 environment samples 29 non-polio enteroviruses were identified, three of which, CA14, EVA76 and ECHO25, were not detected in the period in patients with EVI. The Coxsackie A6 virus, which caused a drastic increase in the morbidity of exanthema forms was the dominant agent in the etiological structure of EVI in 2017 in most areas; the leading etiological agents of enteroviral meningitis (ECM) were the ECHO30, ECHO9, ECHO18 viruses. There was a decrease in the morbidity of both all forms of EVI and computers due to a decrease in the activity of the circulation of epidemic variants of the Coxsackie A6 and ECHO30 viruses as a whole in Russia in 2018. The computer epidemic process in 2018 was supported by the become active or remained active viruses of ECHO6, Coxsacke B5, ECHO9, ECHO18 and other viruses of the Enterovirus B species. The remaining relatively high morbidity of exanthema forms of EVI in addition to the Koksaki A6 virus was supported by the activated viruses Koksaki A16, Koksaki A5 and other viruses of the Enterovirus A species. The results of phylogenetic analysis of genome sequences that dominated etiological agents of EVI indicate that in 2018 there was a multiple importation of enterovirus epidemic variants into the territory of the Russian Federation, which supported the EVI / computer epidemiological process in the Russian Federation as a whole and caused a complication of the epidemiological situation in a number of subjects. It is possible that these events contributed to the arrival of a large number of fans at the 2018 FIFA World Cup and visa-free entry into the territory of the Russian Federation for this category of tourists until the end of the year.