Analysis Of Epidemiological Situation Research Articles

Analysis of Epidemiological Situation on Crimean Hemorrhagic Fever in the Russian Federation in 2020 and Prognosis for 2021

The review presents an analysis of the epidemiological and epizootiological situation on Crimean hemorrhagic fever in the Russian Federation in 2020. During the stated period, 32 CHF cases were registered, which is the minimum indicator since the activation of the natural focus of CHF in 1999. The mortality rate was 3.1 %. The incidence was recorded in the Rostov, Astrakhan Regions, Stavropol Territory, the Republics of Dagestan and Kalmykia. A significant decrease in the incidence of CHF was noted in all entities of the Southern Federal District and the North-Caucasian Federal District. An imported from the Republic of Crimea case of CHF was detected in Moscow. The seasonality of morbidity, occupational, and age composition of CHF patients, modes of transmission, features of the clinical course of the disease in 2020 corresponded to the data of long-term observations. Epizootiological monitoring of the territory of the CHF natural focus showed that the abundance of Hyalomma marginatum adults and the percentage of Ixodidae tick pools positive for the presence of CCHF virus markers corresponded to the average long-term indicators at stationary observation points in 2020 , which indicates the persisting epizootiological disadvantage of the territory of the natural CHF focus in the Russian Federation. The persisting high numbers and infection rate of H. marginatum ticks can contribute to the development of an unfavorable epidemiological situation in the south of the country with a possible increase in the incidence of CHF in the Russian Federation in 2021.

Analysis of natural focal infections incidence in the south of the European part of the Russian Federation in 2017

Aim. The analysis of epidemiological situation on natural focal infections in the south of the European part of the Russian Federation in 2017. Materials and methods. Data of statistical documentation of Departments of Rospotrebnadzor, Centers of Hygiene and Epidemiology in subjects of the Russian Federation, Plague Control Research Institutions and Anti-Plague stations from 8 subjects of the Southern and 7 subjects of the North-Caucasian Federal Districts were used. The findings have been treated using by Microsoft Excel 2010 program. Results. On the territory of the south of the European part of the Russian Federation 962 cases of natural focal infectious diseases (of which 89 per cent were bacterial etiology and 11 per cent were viral etiology) were identified in 2017. Compared with 2016 the rate of bacterial natural focal infections increased by 2,3 per cent, the rate of viral natural focal infections decreased by 50,7 per cent. The number of natural focal infections patients decreased by 8 per cent compared to the previous year. The most of epidemiological complications were observed on the «tick-borne» infections, the rate of which in the general structure of the reported natural focal infections cases amounted to 78,6 per cent (756 patients). Also 6 dengue fever cases were registered, but all of the patients might have acquired the disease after travelling to other areas. Conclusion. The analysis of natural focal infections morbidity in the south of the European part of the Russian Federation in 2017 demonstrates the retention of activity of the natural foci of bacterial and viral infections, therefore questions of prevention of natural focal infectious diseases and constant monitoring of their natural foci in subjects of the Southern and North-Caucasian Federal Districts had the particular relevance.

Epidemic Activity of Natural Tularemia Foci in the Territory of the Russian Federation in 2018 and Forecast of the Situation for 2019

Objective of the study – assessment of epizootic and epidemic situation on tularemia in 2018 and forecasting the risk of infection in the territory of the Russian Federation in 2019. Analysis of epidemiological situation was carried out on the basis of the data from monitoring activities performed by the Rospotrebnadzor institutions and the data contained in the reports of the Irkutsk Research Anti-Plague Institute of Siberia and Far East, Plague Control Center, Federal Center of Hygiene and Epidemiology, as well as federal statistical survey forms No 5 “Information on preventive vaccination” and No 2 “Information on infectious and parasitic diseases” over the period of January-December 2018 in eight Federal Districts including 85 constituent entities. Given are the retrospective data on tularemia epidemic situation in the territory of the Russian Federation over the past decade. 1944 human tularemia cases were registered in Russia between 2009 and 2018, 1005 out of which occurred during epidemic outbreak in 2013 in Khanty-Manssiysk Autonomous Region. High sporadic and small cluster incidence was mainly observed in the territories of the North-estern and Siberian Federal Districts over the recent years. In 2018, 71 cases of human infection with tularemia agent were reported. Epizootic manifestations of varying degree of intensity were detected in 52 entities of Russia. Against that background, sporadic cases of human infection were registered in 19 regions of the country. For three years epidemic complications expressed to the maximum were observed in the Omsk Region – 18 cases of tularemia infection, and Karelia – 14 cases, respectively. 15 Francisella tularensis cultures were isolated from ambient environment objects in Pskov, Leningrad Regions, Altai Territory, Republics of Altai and Tuva. Conclusions have been drawn in relation to the regions where epidemic complications associated with tularemia are most likely to emerge in 2019.

Peculiarities of Epidemiological Situation on Crimean Hemorrhagic Fever in the Russian Federation at the Current stage

Objective. The analysis of epidemiological situation on Crimean hemorrhagic fever (CHF) in the Russian Federation at the current stage, identification of ways to improve the epidemiological surveillance and prophylaxis of the disease. Materials and methods. Data from statistical documentation and results of annual epizootiological monitoring of the CHF natural focus provided by the Administrations of the Rospotrebnadzor, Centers of Hygiene and Epidemiology in entities of the Southern and the North-Caucasian Federal Districts, Reference Centre for CHF monitoring, Research Anti-Plague Institutions and Plague Control stations were used for work. Results and conclusions. The CHF epidemio­logical situation remains unstable, the cases of the disease (including fatal) are registered every year. High activity of the CHF natural focus persists. The northward expansion of CHF natural focus boundaries is observed. The main causes of the unfavorable CHF epidemiological situation are associated with increase in the numbers and period of activity of ticks Hyalomma marginatum due to favorable climatic conditions. The list of priority measures to stabilize the CHF epidemiological situation developed by the Rospotrebnadzor has resulted in decrease in CHF cases by 51.9 % in 2017 compared to 2016 across all the territory of the south of the Russian Federation. The CHF morbidity in 2018 was 1.5 times lower than the average multi-year values (72 CHF patients). The number of CHF cases in comparison to 2017 has decreased by 1.3 times in the Stavropol Territory and by 1.4 times in the Rostov Region. The CHF morbidity has increased in the Astrakhan Region (by 3 times) and Volgograd Region (by 2.3 times). Nosocomial CCHF virus infections cases associated with non-compliance to anti-epidemic regime in hospitals while providing treatment of CHF patients were registered in 2011 (in the Rostov Region) and in 2016 (in the Stavropol Territory). This highlights the need to improve the training of health-care staff for admission of patients with this particularly dangerous infection.

EPIDEMIOLOGICAL SITUATION ON CHOLERA ACROSS THE GLOBE AND IN THE RUSSIAN FEDERATION IN 2007–2016. FORECAST FOR 2017

Analysis of epidemiological situation on cholera around the world has demonstrated downward trend in morbidity rates in 2016; annual average decline being 3.907 % (by reference to 2007). Comparative assessment of monthly incidence in 2015 and 2016 shows perennial registration of cholera cases in a number of African countries and in the Caribbean with up-rises in different seasons. Establishment of epidemic foci is on-going. Between 2007 and 2016, 1733 imported cases of cholera took place across the globe. Interstate import dominated in Asia. For forecast development, for the first time ever, risk assessment of epidemic process activation has been performed, taking into consideration emergency situations of varying origin, social and natural environments, using expert evaluation scores. Epidemic manifestations of cholera in the Russian Federation were characterized by import of the infection in 2008, 2010, 2012, and 2014; isolation of V. cholerae O1 biovar El Tor ctxA – tcpA – , ctxA + and V. cholerae O139 ctxA – and tcpA – from surface water bodies, as well as individual V. cholerae O1 biovar El Tor сtхA + tсра + . Worked out has been the algorithm for epidemiological investigation of causes and conditions of surface water body contamination with cholera vibrios. Cholera forecast worldwide and in Russia for the year 2017 remains unfavorable.

EPIDEMIOLOGICAL SITUATION ON CRIMEAN HEMORRHAGIC FEVER IN THE RUSSIAN FEDERATION IN 2016, AND PROGNOSIS FOR 2017

Abstract. This paper presents analysis of epidemiological situation on Crimean hemorrhagic fever (CHF) in Russia in 2016. Summarized are the results of epizootiological survey of the territory of the natural CHF focus in the south of the European part of Russia, discussed are the results of genetic typing of CCHFV RNA isolates. In 2016, the Russian Federation reported 162 cases of CHF. Increase in the incidence of CHF occurred in the Astrakhan, Volgograd Regions, Republic of Kalmykia, and Stavropol Territory. For the first time CHF case was identified in Kabardino-Balkar Republic. In 2016 in stationary points for the long-term observation of the natural CHF focus, high abundance rates of larvae and nymphs of H. marginatum remain. In case of successful Ixodidae ticks wintering and late onset of the hot and dry season in the summer, 2017, there is probability that high numbers of H. marginatum will be retained and the period of the imago activity is prolonged, which may in its turn contribute to the increase in CHF morbidity rates.

Crimean Hemorrhagic Fever in the Territory of the Russian Federation in 2014, Prognosis of Epidemiological Situation for 2015

Crimean hemorrhagic fever (CHF) is one of the priority infections in the south of the European part of the Russian Federation. Persistently high morbidity rates are retained within the past five year term, with case fatality amounting to 4.3 % on the average. In 2014 registered were 91 CHF cases. Therewith, displayed is the analysis of epidemiological situation on CHF in the territory of Russia in 2014, consolidated are the results of epizootiological surveillance of the CHF natural focus area, represented are the findings of genetic typing of CCHF virus which circulated in Russia in 2014. Using the data on epizootiological monitoring, made has been the forecast of CHF epidemiological situation development for 2015.

Epidemiological Situation on Vector-Borne Natural-Focal Infections in the Territory of Caucasian Mineral Waters

Represented is the analysis of epidemiological situation on vector-borne natural-focal infections in the specially protected eco-resort territory of Russia - Caucasian Mineral Waters of the Stavropol Region. Climactic peculiarities of Caucasian Mineral Waters with their landscape diversity, high abundance rates of ticks and mosquitoes, and anthropogenic impact on ecosystems create favorable conditions for natural foci formation. Crucial epidemiological significance in the regional infectious pathology is attributed to tick-borne borreliosis. Registration of Crimean hemorrhagic fever cases, as well as West Nile (retrospectively) fever and tularemia cases, and identification of specific antibodies to etiological agents of these infections in blood sera of donors testify to volatile epidemiological situation on vector-borne natural-focal infections in the region, which means that there is a need for further ecological, epidemiological and epizootiological monitoring as a constituent element of epidemiological surveillance aimed at provision of sanitary-epidemiological welfare of the population.

Analysis of Epidemiological Situation on Crimean Hemorrhagic Fever in the Russian Federation in 2013 and Prognosis for 2014

Analysis of Epidemiological Situation on Crimean Hemorrhagic Fever in the Russian Federation in 2013 and Prognosis for 2014

Analysis of Epidemiological Situation on Hemorrhagic Fever with Renal Syndrome in the Khabarovsk Territory and the Jewish Autonomous Region, and Prognosis of Its Development for the Past-Flood Period in 2013-2014

Complex analysis of the data concerning epidemiological situation on HFRS in the Khabarovsk Territory and the Jewish Autonomous Region for the past decade (2003-2012) previous to high water in 2013 and results of operative epidemiological inspection of the flooding area and the adjoining territory where a high index of laboratory evidences of the virus presence in the main carriers was revealed, outlines high probability of the epidemiological condition complications in view of the infection in the post-flooding period in 2013-2014 in the both entities. Therewith on the basis of the unfavorable prognosis for the epidemiological situation development a Plan of organizational, preventive and anti-epidemic measures directed to minimization of risks related to aggravation of epidemiological situation on hemorrhagic fever with renal syndrome has been developed and is being implemented.

Analysis of Epidemiological Situation on Leptospiroses in the Amur-River Region. Operational Experience in the Flood Area in 2013, and Forecasting for 2014

For the first time ever mobile SAET units have performed complex investigation of epidemiological situation on leptospiroses in order to provide sanitary-epidemiological welfare of the population in the Amur-River region devastated by high water in 2013. Analyzed have been contemporary published and archival data on morbidity rate and epizootic activity of the natural leptospirosis foci in the Amur-River territory up to 2013. Summarized is the information concerning monitoring over natural focal infections (in particular leptospiroses) in the flooding area, obtained by specialized antiepidemic teams from Irkutsk Research Anti-Plague Institute of Siberia and Far East deployed in Belogorsk town of the Amur Region and Khabarovsk city in 2013. Epizootiological situation during the high water period in the Jewish Autonomous Region has been defined as an extremely adverse, unlike the Khabarovsk Territory and the Amur Region where epizootic process is less expressed. Therewith aggravation of epidemiological situation on leptospiroses in the Amur-River Region in 2014 is not ruled out.

Analysis of the Anthrax Morbidity Rate in the Russian Federation in 2011, and Prognosis for 2012

Carried out is the analysis of epidemiological situation on anthrax in 2011, both in the Russian Federation and around the world. The results of the analysis bear evidence of the fact that in the constituent units of the federal districts of Southern Russia and Siberia anthrax morbidity in humans will be retained at the annual average level (characteristic of the recent decade) - ranging from 1 to 20 cases of the disease.

Epidemiological Situation on Anthrax in the Russian Federation: Analysis of Morbidity in 2010, Prognosis for 2011

Analysis of epidemiological situation on anthrax in the Russian Federation and all over the world in 2010 is carried out. Prognosis of morbidity for 2011 is presented.