The trend towards an increase in the West Nile fever incidence among the population in the Russian Federation, recorded in the season of 2018, continued and led to a significant increase in the incidence in 2019 (the indicator was 2 times higher than the long-term average). The features of manifestations of the epidemiological process of WNF in 2019 were identified: early registration of cases of the disease, activation of natural and natural-anthropourgic foci in the Southern Federal District (90 % of the total incidence in the Russian Federation), an increase in the share of neuro-invasive forms, dominance of patients aged 50 and older in the structure of the incidence, late epidemic season ending. It was established that in the season of 2019, the lineage 2 of WNV circulated in the European part of Russia. In the Volgograd Region, simultaneous presence of the West Nile virus and Sindbis virus in mosquitoes Culex pipiens and Culex modestus was identified. It was shown that the most significant factors for predicting the epidemiological situation on West Nile fever in the Volgograd Region are the average seasonal summer air temperature and monthly average indicators of relative humidity in the spring and summer periods, and the average monthly air temperatures in the spring and summer in the Rostov Region. In the Astrakhan Region, a significant correlation dependence of the influence of the considered factors on the incidence of the population has not been established. The forecast of the development of epidemic situation in 2020 does not exclude a possible increase in the incidence in the territories of the European part of Russia, endemic for West Nile fever, and the occurrence of local outbreaks in individual constituent entities, if the complex of climatic conditions and social factors favorable for West Nile virus coincide.

Mass gatherings (MGs) always incur some kind of potential hazard associated with incipiency of emergency situations with sanitary-epidemiological bias (ES). Upcoming Universiade (World Student Games) in Kazan (July, 2013) raises an issue of implementation of a unified system of approaches to the effective provision of sanitary-epidemiological welfare of the population, taking due account of peculiarities and specific conditions under which the MG will be conducted. Therewith key objective of this study has been formulated as elaboration of the system based on epidemiological assessment of real and potential threats at the MG. Analyzed have been the data on 37 MGs carried out over the period of 25 years since 1987 up to 2012; investigated is epidemiological situation in 170 participating states. Worked out is a scheme of qualitative determination of potential epidemiological threat on the basis of comprehensive assessment of epidemiological risks in the endemic territories of the troubled regions. Distinguished is a complex of measures for the provision of sanitary-epidemiological welfare when managing the Universiade in Kazan heedful of high potential epidemiological hazard of this event.

No abstract

International public events (IPE) present some actual epidemiological problems requiring proper methodological elaboration. In this respect for the first time developed has been the scheme of assessment of their potential epidemic hazard (PEH), based on integrated evaluation of epidemiological risk as regards infectious diseases listed in the IHR (2005). On the cholera model demonstrated is the fact that high priority hazard of public events emerges when those are combined with such elements of epidemiological risk as territory and time of a threat, as well as risk factors and risk contingents. Thus the integral effect of all elements realization is manifested through high probability of infectious disease importation, which is associated with emergency situation, into the public event location and the disturbance of mass gathering progress. Reliability and functionality of the developed scheme is verified on other infections too. PEH assessment procedure allows for timely identification of priority goals, for rating means and capacities, organizational resources, methodological and technological arrays for the provision of sanitary-epidemiological welfare and biological safety when managing public event.

Проведена оценка проявлений эпидемического процесса COVID-19 в Волгоградской области по интенсивности, территориальному распространению, среди различных групп населения (пол, возраст, социальный статус), особенностям клинической форм заболевания. Показано, что отмечается стабильное снижение заболеваемости новой коронавирусной инфекций, проявляющееся сокращением общей и групповой заболеваемости, количества семейных очагов инфекции, числа госпитализированных пациентов. В структуре заболевших наблюдается преобладание лиц женского пола (54,2 %), что сопоставимо с данными по Российской Федерации. Наибольший процент заболевших приходится на возрастные группы 40–49 лет (18,1 %) и 50–59 лет (19,8 %). В клинической картине заболевания преобладают легкие и бессимптомные формы, отмечаемые в примерно равном соотношении (35,4 и 34,5 % соответственно). В Волгоградской области установлена более низкая частота регистрации тяжелых форм и летальных исходов по сравнению с Российский Федерацией в целом. В социальной структуре заболевших наибольшую долю составляют пенсионеры (25,2 %) и рабочие (11,7 %).