MODERN EPIDEMIOLOGICAL CHARACTERISTICS OF NOROVIRUS INFECTION IN MOSCOW

Abstract

Aim. Norovirus infection (NVI) epidemiological characteristics evaluation in Moscow at municipal and district levels. Materials and methods. A retrospective analysis of NVI incidence rate was conducted according to the 2009 - 2016 state statistical reporting forms data. Results. In 2009 - 2016 NVI incidence rate has a trend to increase in Moscow, either at municipal and district levels. NVI cases were registered among children mostly (78% in the SEAD of Moscow, 80% in Moscow and 81% in Russia), at the same time adults proportion of NVI incidence rate increased significantly (up to 42,7% in Moscow and 13,9% in the Russian Federation) by 2016. The morbidity dynamics in different child population age groups was effected by the outbreaks cases. Totally in 2011 - 2016 33 outbreaks were registered in Moscow (24,3% from all acute diarrheal infection outbreaks in Moscow for the same period), where 64,3% with nonpercutaneous channel of infection and 35,7% alimentary. Outbreaks were more often recorded in children’s organized collectivity (69,7%). Conclusion. Nowadays in Moscow there is an NVI incidence increase trend is evidenced, with an increase of the adult population proportion in morbidity structure. At this stage, main contribution to group morbidity was made by children 7 - 14 and 15 - 17 years old. One of the reasons for the NVI incidence rate growth in Moscow (2016) could possibly be the lack of effective prevention measures. Actually, specific NVI diagnostics provided only in outbreaks, due to the lack of routine diagnostic tools. The main reason for the NVI group morbidity effective disease area formation is still sanitary and anti-epidemic regime violation at sites and facilities.