Abnormal rainfall flood in the Amur-River region, July-September, 2013, set the scene for aggravation of epidemiological situation on diarrheal diseases, as well as droplet spread infections, and natural-focal infections and diseases, common for both humans and animals. To stabilize the situation in flooded areas of three territorial entities in the Far East region involved were SAETs of the Irkutsk Research Anti-Plague Institute: SAET 1 (the Amur region) and SAET 2 (the Khabarovsk Territory and Jewish Autonomous Region). Within the frames of Rospotrebnadzor Decree implementation SAET 1 was transported to the Amur Region by means of airlift. Mobile unit performed its operations independently, in an autonomous mode. Laboratory facilities were set up on the base of pneumo-framed modules. The aim of the SAET consisted in carrying out a complex of measures related to sanitary-hygienic and epidemiological monitoring in the territory of the municipal entities devastated by floods. SAET 1 completed its mission successfully.

Taking into consideration emergency conditions of rainfall flooding in the Khabarovsk Territory and the Jewish Autonomous Region in August-September 2013, forming premises for aggravation of the epidemiological situation a decision was made to deploy a laboratory-epidemiological SAET reinforcement unit No. 2 (SAET-2) from Irkutsk Research Anti-Plague Institute into the exposed area. SAET-2 staff was step-by-step relocated to the site of emergency to participate in the inspectional operations. Withdrawal of specialists was also performed on a stage-by-stage basis as the work advanced. For the first time ever SAET was established right at the natural disaster site and recruited from experts who are on regular SAET-2 staff of the Irkutsk Research Anti-Plague Institute, and from personnel reserve of the Rospotrebnadzor institutions in the Khabarovsk Territory. Complex approach, applied for the management of its work, allowed for alliance of forces and facilities of various Rospotrebnadzor territorial establishments, Rosselkhoznadzor and veterinary medicine institutions into the uniform mobile specialized brigade avoiding overlap of responsibilities and interference into day-to-day operational activities of Rospotrebnadzor territorial institutions. SAET-2 was to implement a complex of measures for sanitary-hygienic and epidemiological surveillance over the municipal territories suffered from flood. Team operational activities were carried out on the basis of stationary laboratories at the territorial establishments of Rospotrebnadzor in the Khabarovsk Territory and the Jewish Autonomous Region that were converted for working under emergency conditions mode. The mobile brigade has performed the tasks successfully. It has provided sanitary-epidemiological welfare of the population under emergency conditions of rainfall flood.

Displayed are the major results of work of the specialized anti-epidemic teams from Irkutsk Research Anti-Plague Institute, aimed at the provision for sanitary-epidemiological welfare of the population in the Amur Region, Khabarovsk Territory and the Jewish Autonomous Region, devastated by the abnormally high water, in 2013. Represented are the data on sanitary-hygienic and epidemiological monitoring over the territory of the worst-hit areas. Revealed are the findings as regards examination of water samples obtained from the centralized and decentralized water supplies, surface water reservoirs and treatment facilities for presence of Vibrio cholerae , and of clinical material - for intestinal viruses, as well as serological screening of the decreed groups and foreign citizens temporarily working in the Russian Federation. Presented are the results of epizootiological-epidemiological inspection of the endemic areas for natural-focal infections, and also potentially hazardous areas as concerns anthrax, situated within the bonds of the flooded territories. Total of 3626 samples have been tested, 15502 analyses for 23 nosological entities have been performed.

Abnormal rainfall flooding in the Amur Region formed premises for aggravation of epidemiological situation on acute enteric infections. Despite the organized strict control over compliance with applicable sanitary-epidemiological regulations at the temporal accommodation sites, a cluste of enterovirus infection occurred in one of them. On-time performed anti-epidemic measures made it possible to avoid distribution of the infection among the evacuated population and its dissemination outside the territory of that temporal accommodation site. Displayed are the data on operational experience of the Rospotrebnadzor institutions in the Amur Region in managing prophylactic and anti-epidemic activities aimed at the prevention of occurrence and distribution of the infectious diseases among the population evacuated from areas exposed to flood and placed in temporal accommodation sites.

Since the first day of the emergency, organized was the surveillance over the water supply provision for the population of the Khabarovsk Territory with a view to decrement of the high water aftermaths. Laboratory control of the water quality was performed in the amplified enhanced mode. Based on the results of the control, necessary measures were operatively undertaken. In accordance with the current legislation procedures, proposals for the improvement of water supply quality, hyper chlorination, and application of alternative ways of water supply were submitted to the local government authorities. The population was warned about consumption of guaranteed quality drinking water only. The problem of fresh water provision in the period of rainfall floods was addressed by means of bottled water supplies delivery to the remote waterlogged areas of the region. Control over the centralized and non-centralized water supply sources, implementation of sanitary-and-antiepidemic activities made it possible to prevent the emergence of acute enteric infection, virus hepatitis A, and other infectious disease outbreaks.

Quality degradation of the utility-and-drinking water supplies in the Far Eastern Federal District in July-September 2013, as well as emergence of factors contributing to the development of extreme epidemiological situation required urgent implementation of measures to enhance surveillance and laboratory monitoring over drinking water supply in the populated areas of the Amur Region exposed to the flooding. Results of monitoring of drinking water from the water supply sources, distributing network, water transportation and storage tanks revealed the increase in numbers of samples, nonstandard in reference to sanitary-chemical, microbiological and virological indicator requirements and formed the premises for the analysis of the water supply conditions. Development and implementation of a complex of measures for the dynamic response to the changing conditions, including prohibition on the water source usage, introduction of the additional processes for water treatment and hyper chlorination allowed for minimization of risks of the epidemiological situation aggravation in the region.

A large-scale rainfall flooding in the territory of the Amur Region formed the foundation for dramatic aggravation of epidemiological situation, in that which concerns outbreaks of diarrheal disease, activation of epidemic processes associated with enteroviral infection and a number of natural-focal infectious diseases, as well as emergence of anthrax cases both among animals and humans. Basic anti-epidemic and preventive activities under emergency situation included: epidemiological monitoring over infectious and non-infectious morbidity among the population; microbiological and virusological laboratory surveillance of the ambient environment objects and water supply sources; sanitary-hygienic monitoring of the habitant living environment; immunization of the population depending on epidemiological indications; planning and implementation of disinfection, deratization, and disinsection procedures in the flood-stricken areas. Successful cooperation between the Rospotrebnadzor local agencies, Irkutsk Research Anti-Plague Institute SAET, regional health institutions and other organizations involved, in a challenging situation at the flooding site, made it possible to avoid serious epidemic complications among the population of the Amur Region.

Described are the chronology and main peculiarities of floods in the Amur Region within the historical period since 1872 till present time. Given are the data on the damage to the Amur-river territory economy as a result of catastrophic high waters in 1928, 1950s, 1984, 2007. Comprehensively discussed are the peculiarities of the flooding, August-September 2013 as one of the most intense and prolonged in the history of the hydro-meteorological observations in the Far East. It is found out that Zeisk and Bureisk hydroelectric power stations turned out to be the only buffer storage restraining two thirds of the water volume of Zeya and Bureya rivers inflow in their flowages over a period of flood. Outlined are the general guidelines for emergency response activities under high water conditions for the Rospotrebnadzor Administration Quarters in the Amur Region. Implementation of the complex of actions through the offices of the territorial Rospotrebnadzor institutions in cooperation with the executive authorities has allowed for the prevention of epidemiological implications, providing for favorable sanitary-epidemiologic situation at the time of high water.

In order to enhance the surveillance over sanitary-epidemiological situation in the period of flood, 2013 Rospotrebnadzor institutions in the Khabarovsk Territory took anti-epidemic team augmentation, affiliated to Irkutsk Research Anti-Plague Institute. Moreover, forged have been 30 mobile units for investigation of sanitary conditions in the residential areas of the region, water supply and water-consuming facilities, quality of nutrition among the population, living and sanitary conditions in the temporal accommodation sites; 11 mobile groups for sample collecting from ambient environment objects. Carried out has been operational deployment of two laboratory sub-units with the following membership: 5 microbiological, 5 sanitary-chemical, 2 radiological and 1 virusological facilities. By efforts of Rospotrebnadzor institutions performed has been a complex of key sanitary-hygienic, anti-epidemic and prophylactic measures aimed at prevention and control over distribution of mass infectious diseases, at the provision of sanitary-epidemiological welfare of the population in the Khabarovsk Territory, and the relief of social tension during the period of rainfall floods in August-September, 2013.

Displayed are the results of work of the Rospotrebnadzor Administration in the Amur Region in view of the population notification concerning sanitary-epidemiological situation and current anti-epidemic operations under the emergency event preconditioned by the large-scale high water, 2013. In order to avoid aggravation of epidemiological situation in the region, Rospotrebnadzor Administration has performed provision of the exposed population in the devastated territories (including temporal accommodation sites) with the information on the significance of adherence to personal safety practices for infectious diseases prevention, of usage high quality drinking water only (boiled or bottled and distilled), of immunization against viral hepatitis A, typhoid fever and Sonne dysentery, of sanitation activities in the lodgings, back yards, wells, as well as of holding to the discipline of rodent-born infection prevention. On-time notification of the population under emergency conditions benefited to the reduction of risks associated with aggravation of sanitary-epidemiological situation in the exposed territories.

Developed by the Rospotrebnadzor Administration in the Khabarovsk Territory was the algorithm for establishing cooperation between bank institutions, insurance companies, and other organizations on the basis of debt restructuring and payment adjourning. Compiled was the handbook for loan borrowers as regards their rights fixed in the current normative regulations. Displayed was the information on the preventive procedures for consumer financial and insurance protection that were being carried out by the Rospotrebnadzor Administration in cooperation with other agencies and services, allowing for relief of social tensions on the part of the population affected by flood.

Medical assistance to individuals residing in the flooded areas of the region was delivered on a priority basis throughout the health care institutions on the territorial-division principle, at the temporal accommodation sites, further on - long-term stay centers, 24-hours a day. Determined was the amount of means for specific prophylaxis, immunized was the contingent under risk, stocked up were pharmaceutical preparations, medical products and consumables. Therewith, carried out therapeutic, medical-preventive operations turned out to be on-time and sufficient for providing essential complex of medical assistance to the exposed population in the devastated areas.

Extended is the experience in management of immunization among the population based on epidemic indications under emergency situation associated with the large-scale flooding. Performance of non-specific prophylaxis in the period of flood relief, in particular mass immunization of the population against viral hepatitis A, typhoid fever, Sonne dysentery and flue, as well as carrying out preventive phage delivery to the most vulnerable strata of the citizenry along with other anti-epidemic and prophylactic activities have made it possible to hold the control over morbidity rate on the long-term average annual levels and avoid aggravation of epidemiological situation in the region.

Put forward was operational protocol as regards Rospotrebnadzor institutions policies in the territory of the Jewish Autonomous Region for the prevention of epidemiological implications during the post-flooding period in reference to infectious diseases. Carried out were control measures over infection morbidity rate, drinking water quality, disinfection of water supply sources, as well as sewage systems. Actions undertaken made it possible to prevent cluster cases of infectious diseases both in the flooded areas and at the temporal accommodation sites; to provide control over acute intestinal and natural-focal disease incidence, keeping it to the level of long-term average annual indexes; and to supply the population with drinking water of high quality.

Worked out by the Rospotrebnadzor Administration in cooperation with the Amur Region Government and the head office of the Central Bank of Russia was a plan of operation aimed at the provision of financial loan consumers’ rights protection through the implementation of simplified repayment procedure. Rospotrebnadzor Administration charged itself with the responsibility to inform and provide counseling to affected borrowers and to gather the data on their numbers and the volume of the credits allowed. The measures undertaken made it possible to delay the deadlines and decision making on the financial problems emerged, which concerned the repayment of debts, all in order to use the available sums for elimination of consequences and aftermaths of the disaster.

Hydrological natural disasters and post-flooding epidemiological situation are often attended by epidemic emergencies creating a threat to life-comforts sustaining and sanitary-epidemiologic welfare of a significant number of citizens. To evaluate the efficiency of preventive and anti-epidemic measures the analysis of acute enteric infection incidence rate in the Amur Region for the past decade, during the high water and in the post-flooding period in 2013 has been carried out. Displayed are the data concerning the prophylaxis of acute enteric infections and viral hepatitis A under the conditions of the emergency situation caused by natural calamities notably by flood in the Amur Region. Adequate planning and operative implementation of organizational, preventive and anti-epidemic measures have made it possible to control acute enteric and viral hepatitis A infection at the sporadic level.

Considerable aggravation of sanitary-hygienic situation forming the basis for occurrence of mass infectious disease outbreaks is observed when immense territories are water logged, and water supply systems are destructed. Therewith in order to provide control over the spread of acute enteric water-borne infections in the Jewish Autonomous Region investigated was the morbidity both in the last decade and after the flood period in 2013. The system of organizational and preventive actions included inspection of water intake constructions, zones of sanitary protection of water fences; laboratory control over the drinking water quality; organization of the homesteads patrolling for early detection of infectious diseases; monitoring of the infectious and parasitic diseases incidence rate; management of the vaccine prophylaxis; inspection of solid household waste storage sites and other epidemically significant objects in the flooded area; determination of necessary disinfectant quantity; provision of the population with information concerning implementation of the post-flood prophylactic measures. The actions undertaken permitted to get the epidemic situation on acute enteric infections including the water-dependent ones under control.

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.

It is supposed that after exposure to impacts of the large-scale high water on the background of chronic persistent stress, immune activity of the organism is decreased, which may lead to sanitary-epidemiological implications and contribute to morbidity rate increment as regards a number of relevant nosological entities among the population of the devastated territory. Statistically community-acquired pneumonias are still one of the key factors for infectious morbidity, hospitalization and mortality rate in the region. They are indicators for organization of medical assistance to the population. Therewith, evaluated has been morbidity rate in reference to acute respiratory viral infections and community-acquired pneumonias in the Amur Region for the past three years, assessed has been epidemiological situation throughout 2013. Morbidity rate as regards community-acquired pneumonias in the Amur Region over the surveyed period (2010-2013) has turned out to be two times higher than the national one, and 60-70 % - than that throughout the Far Eastern Federal district. In order to avoid distribution of the acute respiratory viral infections, flue, and community-acquired pneumonias and epidemic foci formation in the territory of the Amur Region in the post-flooding period, established is a complex of sanitary-anti-epidemic (prophylactic) and remedial measures. Besides of that, identified are the main areas of activities aimed at stabilization of the situation as a long term strategy.

Analysis of the incidence rate over the past decade as regards acute intestinal infections in the Khabarovsk Territory has revealed unfavorable epidemiological situation on bacterial dysentery, enteric infections of rotavirus and undetermined etiology. The most unfavorable situation in the pre-freshet period was registered in the Nanai District. The large-scale preventive actions for immune-prophylaxis of viral hepatitis A, Sonne dysentery and typhoid fever, as well as a complex of anti-epidemic and sanitary-hygienic measures were performed during the summer flood of 2013. These measures provided for prevention of acute intestinal infections outbreaks as an aftermath and control over epidemiological situation in the Khabarovsk Territory during the flood.

of epidemiologically significant territories, 63 centralized water supply systems, 111 wells, 3 animal burial sites, and 117 infrastructure facilities. It minimized flood aftermaths and provided for avoidance of epidemiological situation complications.

Long-term manifestations of epidemiological process of enterovirus infection in the Jewish Autonomous Region were similar to those in the Khabarovsk Territory, though with a lower intensity. After establishment of emergency situation regime, in view of the rainfall flooding in 2013, enterovirus morbidity rate had been increasing within three weeks duration, then started to fall rapidly. Clustered cases of enterovirus infection were not registered. Viral serous meningitis ratio was insignificant as minor forms of the disease prevailed; coxsackie virus A-9 and echovirus-6 dominated. During the flood period isolated from samples of patients with minor forms of enteroviral disease were three enterovirus strains, type 71, sub-genotype C4a, possessing a high degree of genetic similarity to the Chinese ones, 2010-2011. All in all impact of the natural disaster on the epidemiological situation on enteroviral infection in the Jewish Autonomous Region turned to be insignificant.

Carried out has been retrospective analysis of epidemiological process manifestations as regards enteroviral infection in the Khabarovsk Region over the period of 7 years, prior to rainfall floods in 2013. Revealed is the possibility of aggravation of epidemiological situation during hydrological emergency situation. The premises are as follows: persistent due to specific climate conditions prevalent in the Khabarovsk Territory (high air and surface water temperatures, and high humidity rates) unfavorable epidemiological situation on enteroviral infections, virus-carriage in “healthy” people and extensive dissemination of enteroviruses in the water bodies of ambient environment. Moreover, widespread circulation of different enterovirus genotypes, including the isolates with high genetic similarity to the strains identified earlier in the adjoining People’s Republic of China, takes place.

There has been observed a tendency to increment of enterovirus morbidity rate over the past seven years. Foci of this infection have been formed in the area from time to time, with minor forms of the disease being predominant in clinical findings. Genetically enteroviruses circulating in the Amur Region have been characterized as homogenous; however there is a genetic relation among them with and, consequently, epidemiologic connection to enteroviruses originated from China. However, since May, 2013 there has been detected a boost activation of epidemic process as regards enteroviral infection, followed by the formation of two major foci with clustered infection, due to importation from Thailand as well. Emergency situation under conditions of flood (August-September, 2013) has contributed to aggravation of epidemiological situation on enteroviral infection. It has led to the increase in numbers of the exposed up to the maximum level for the past few years. In the territory of the temporal accommodation sites, where affected by high water and exposed to the infection population was placed, registered have been the cases of clustered enterovirus infection.

The paper contains the data on the role of high waters (2013) in changing epidemiological situation on enterovirus infections in the Khabarovsk Territory. The incidence rate in the region was characterized by the significant increase even before the flood, 2013. Thus, two peaks of enterovirus morbidity curve were identified for the period of a week: one - more intensive, another - coincident with flood outbreak. Enterovirus epidemiological process was notified by the changes in clinical picture among the infected population and cohort age-related structure. The percentage of the patients with enterovirus infections in the foci clusters and the index of people infected due to possible exposure to shattering impact of the flood, turned out to be low. However, revealed was high rate of heterogeneity of the circulating enterovirus strains, non-specific for the Khabarovsk territory and mostly originating from countries of Asia-Pacific region - coxsackie A viruses, which might stand for a possible cause of unfavorable epidemiological situation in 2013.

The Amur Region of the Far Eastern Federal District is classified as a territory with low density of population. Availability of medical assistance to the population in the areas separated from industrial centers is cut. In this regard, analyzed were demographic indicators, morbidity and mortality rates in 2011-2012 as is recognized in official statistical documents. According to the Rosstat data the birth rate in the Amur Region in 2012 tended to be increased and exceeded an average index in the Russian Federation. In 2012 natural decline of the population in the Amur Region dropped down; it was 0, 4 per 1000, as compared to 2011 - 1, 2. According to the data of the Ministry of Health of the Russian Federation total morbidity rate, taking into consideration all categories of illnesses, in the Amur Region in 2012 raised up to 3,6 %; as regards illnesses of respiratory organs in particular - to 5,9 %, initial incidence rate - to 6,4 % in comparison with 2011. Proportion of respiratory organs infection in the total morbidity index in the Amur Region in 2012 reached 23,7 %, while in the initial incidence rate - 41 %. Pneumonia morbidity index in the Amur Region in 2012 was considerably higher than that throughout the Russian Federation. According to the Rosstat indicators, population mortality by reason of respiratory organs infection in the Amur Region in 2010-2012 exceeded the one in the Russian Federation and Far Eastern Federal district. In 2011, standardized indicator of human mortality rate from pneumonias in the Amur Region exceeded the indicator in Far Eastern Federal district and it was more than 2-fold higher than in Russia.

Widespread epizootiological investigations were performed to estimate the influence of the Amur River flood on the epizootic activity of tularemia in small rodent populations within natural and anthropourgic foci. Determined were the numbers of the rodent-carriers and epizootic activity of tularemia infection in the forest type, lowland, flood-swamped as well as anthropourgic foci. The capture and enumeration of the rodents was conducted using Gero rat traps. Tested were water and silt samples, rodent nests, pellets and excrements of carnivorous mammals. Blood sera of healthy persons living within the focal territory were examined to reveal the immune-competent cohort. Collected materials were analyzed using bacteriological, genetic diagnostic and serological methods. Extremely high numbers of the carriers were registered in the lowland meadow-field and anthropourgic foci adjacent to the flooded areas. The signs of tularemia epizootic process were observed in the meadow-field and flood-swamped foci. Failed to reveal during the period of high water were the epizooties in the forest foci.

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.

Anthrax animal burial sites and potentially hazardous as regards anthrax territories (PHT) of the three municipal entities in the Far Eastern Federal District (FEFD) were exposed to the Amur River flood (the Amur River basin, river inflows, and near-by territories), the emergency situation in August-September 2013. In order to estimate epizootiological-epidemiological situation on the infection carried out was retrospective analysis of morbidity rates among the population and the livestock animals of the region. Studied were the peculiarities of anthrax spatial distribution and sanitary conditions of PHT and animal burial sites (including anthrax ones). Laboratory investigations of soil and bone samples for the presence of Bacillus anthracis were conducted. Thus based on the results obtained the short-term forecast for epidemiological situation development in the post-flood period was worked out, and a complex of anti-anthrax actions was recommended.

Carried out were epizootiological studies of the flooded areas of the Amur Region, the Khabarovsk territory, and the Jewish autonomous region in order to investigate the situation on tularemia in view of the river floods in August-September, 2013. Involved were specialized anti-epidemic teams from Irkutsk Research Anti-Plague Institute for works at the site of emergency. Therewith, analysis of the data of the epizootiological examination of the territories obtained in cooperation with specialists from the Rospotrebnadzor local Centers of Hygiene and Epidemiology, and results of laboratory investigations with application of bacteriological, immu­no­bio­logical and molecular-genetic methods indicated insignificant epizootic and epidemic activity of the natural tularemia foci. Given is the conclusion on epizootiological-epidemiological condition for tularemia in the flooded areas of the Amur River region and a short-term epizootiological forecast for 2013-2014, as well as recommendations concerning stabilization and improvement of epidemiological conditions in the region.

Objective of the work was to estimate the number and state of the small mammal populations after the summer flood, 2013 in the territory of the Amur Region and make short-term forecasting of the epidemiological situation development. Carried out was small animals capturing using Gero traps with bread as a bait. Epizootiological surveillance in August-September 2013 indicated that the numbers of small mammals did not differ from the average annual rates, but the process of active reproduction in the populations was being underway. In October-November a sharp increase in the animal abundance rate was registered, reproduction process terminated. Large-scale flooding resulted in the formation of local settlements with a high animal density. Stress, aggressiveness and food ration change along with seasonal migration of rodents into human buildings predetermined epizootiological and epidemiological premises for onset of natural-focal infections. Therewith the conclusion was made up that it was necessary to perform epizootiological monitoring of the small mammal populations and realization of measures aimed at the rodent extermination in human settlements in 2014.

Emergency situation (ES) due to flood, 2013 required enhancement of sanitary-epidemiological surveillance over the natural-focal infections in the devastated territories. Hands-on assistance for the provision of sanitary-epidemiological welfare in the Khabarovsk Region was accomplished by special anti-epidemic team of the Rospotrebnadzor Irkutsk Research Anti-Plague Institute of Siberia and Far East. Inter-agency cooperation and interaction was managed by the Emergency Response Committee, as well as Sanitary-Epidemiological Commission appurtenant to the local administration, and by the Rospotrebnadzor Headquarters in the region. Developed and carried out was a “Plan of action regarding prophylaxis of natural-focal diseases”. Integrated assessment of sanitary-epidemiological and epizootiological situation in the endemic in reference to natural-focal infections municipal entities of the Khabarovsk region made it possible to organize and implement all necessary preventive and anti-epidemic measures aimed at stabilization of epidemiological situation on natural-focal infections.

Represented is a quantitative characteristic of the objects and facilities in the Jewish Autonomous Region exposed to the flooding-2013. Justified is the necessity for implementation of preventive measures against increase in the activity of HFRS natural foci; showed are the data on disinfestation organization for the prevention of natural-focal infection during the high water and post-flooding period in 2013. Displayed are the results of deratization efficacy control in various administrative units of the entity, calculated using Abbot formula, as well as results of investigation of small rodent population density at the natural stations and substantiation of the barrier disinfestation carrying out. Specified are the areas of the continuous and barrier disinfestation, indicators of Hanta Virus contamination of the rodents caught while performing control over efficacy of deratization works.

Displayed are the results of examination of immuno-competent local population of the Khabarovsk Territory, the Jewish Autonomous Region, the Amur Region, as well as foreign residents living and temporarily working in the areas, on a wide range of natural-focal bacterial and viral infectious diseases including the causative agents of some “exotic” infections too. Investigations have been carried out with the participation of experts from the specialized anti-epidemic team No. 1 (Irkutsk Research Anti-Plague Institute), who worked in the Amur Region, and a group of laboratory-epidemiological specialists from the team No. 2 - deployed in the Khabarovsk Territory and the Jewish Autonomous Region during the flooding in August-September 2013. The total of 1335 blood sera samples has been tested using serological methods. The findings have revealed the presence of immuno-competent population in the three regions of the Far Eastern Federal district in reference to the agents of natural-focal infectious diseases: tularemia, leptospirosis, yersinioses, hemorrhagic fever with renal syndrome, human granulocytic anaplasmosis, tick-borne borrelioses, tick-borne viral encephalitis, Californian encephalitis serogroup, Sindbis, West Nile and Dengue fevers. Circulation of Batai and Crimean-Congo hemorrhagic fever viruses has not been revealed based on serological assays.

Emergency situation in summer 2013 due to flooding of extensive areas of the Russian Amur-River territories (including residential areas with different level of development of public services and amenities, agricultural land, sites of cattle grazing and stock-keeping) resulted in the increased microbiological, virologic and physical-chemical load upon water reservoir ecosystems. The results of monitoring over water supply sources, quality of drinking water and surface reservoir waters in the devastated territories were analyzed by the specialists from Rospotrebnadzor and specialized anti-epidemic teams No. 1 and 2. Complex approach presuming increase in extent and frequency of the examinations, performance of operative epidemiological analysis along with daily adequation of preventive and anti-epidemic measures allowed for taking control over the situation and to avoid epidemic complications as regards acute water-borne intestinal infections.

genotype and a unique MLVA profile. The results of the monitoring indicated that there were optimal for
V. cholerae accumulation in surface water reservoirs conditions and it was necessary to enhance measures for cholera prophylaxis in the post-flood period.

Represented is the short characteristic of natural waterways and temporal distribution of atmospheric precipitations in the Jewish autonomous region. Given are the data on the organization and carrying out of monitoring as regards centralized and non-centralized water supply sources and other socially significant water objects in the Jewish Autonomous Region under the conditions of flooding and during the post-flooding period in 2013. Enforced has been control over sanitation of the unorganized water supply sources located in countryside, provision with disinfectant agents along with information distribution regarding essential anti-epidemic measures that are to be taken. Outlined is the total number of the drinking water samples, investigated at the time of a high water period, wherein reasonably high rates of inconsistent indexes has been detected. Thus, the scope of conducted preventive and anti-epidemic actions have made it possible to keep the epidemiological situation in the Jewish Autonomous Region stable.