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Journal articles on the topic 'Natural foci'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 July 2025

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1

Shpitz, Baruch, Kazuko Hay, Alan Medline, et al. "Natural history of aberrant crypt foci." Diseases of the Colon & Rectum 39, no. 7 (1996): 763–67. http://dx.doi.org/10.1007/bf02054441.

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2

Dubyansky, V. M., and A. Kh Khalidov. "Ecological-Epizootiological Differentiation of Natural Plague Foci." Problems of Particularly Dangerous Infections, no. 4 (January 26, 2022): 62–66. http://dx.doi.org/10.21055/0370-1069-2021-4-62-66.

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Plague foci differentiation is at the core of surveillance and forecasting of epizootic activity and hence achieving high effectiveness of prophylactic measures for prevention of human plague cases. Improvement of the plague foci differentiation taking into account recent data on their status and functioning is a relevant objective. The aim of the study was to differentiate natural plague foci according to the significance of ecology factors in the dynamics of epizootic activity. Materials and methods. Various models for forecasting epizootic activity of natural plague foci, based on the consi
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3

Churbanova, T. A. "HFRS Natural Foci in the Republic of Mordovia." Problems of Particularly Dangerous Infections, no. 3(97) (June 20, 2008): 68–69. http://dx.doi.org/10.21055/0370-1069-2008-3(97)-68-69.

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The landscape-ecologic zoning of HFRS natural foci was carried out. Three zones and 13 natural foci were ear-marked in the territory of the Republic of Mordovia. Places where people can be infected and the indices of HFRS immunity of the community in some natural foci were determined. As a result of epizootiologic investigation it was stated that 4.1 % of rodents were infected by Hantavirus. Continuous monitoring of HFRS natural foci is necessary to carry out modern preliminary prophylactics of this disease.
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4

Filimonova, E. S., E. I. Bondarenko, E. I. Krasnova, et al. "Detection of agents of natural foci infections." Infectious diseases: News, Opinions, Training 10, no. 4 (2021): 90–97. http://dx.doi.org/10.33029/2305-3496-2021-10-4-90-97.

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5

Bejarano, P. "The natural history of aberrant crypt foci." Yearbook of Pathology and Laboratory Medicine 2009 (January 2009): 41–42. http://dx.doi.org/10.1016/s1077-9108(08)79019-4.

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6

Schoen, Robert E., Matthew Mutch, Christopher Rall, et al. "The natural history of aberrant crypt foci." Gastrointestinal Endoscopy 67, no. 7 (2008): 1097–102. http://dx.doi.org/10.1016/j.gie.2007.08.048.

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7

Gu, Xiao-Lan, Rui Wang, Chuan-Min Zhou, et al. "Natural Mediterranean Spotted Fever Foci, Qingdao, China." Emerging Infectious Diseases 28, no. 12 (2022): 2524–27. http://dx.doi.org/10.3201/eid2812.221097.

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8

Mikhaylova, T. V., T. N. Demidova, M. I. Kormilitsyna, D. A. Kvasov, A. V. Kozorezov, and D. B. Trankvilevsky. "Epizootic Activity and Epidemic Manifestation of Natural Fod of Tularemia in Voronezh Region." Epidemiology and Vaccine Prevention 16, no. 1 (2017): 16–21. http://dx.doi.org/10.31631/2073-3046-2017-16-1-16-21.

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Tularemia natural foci were investigated in the 15 districts of the Voronezh region. 1533 small mammals of 11 species were captured in 2011, 2014 and 2015 to identify antigen and/or DNA of tularemia pathogen. In all the studied areas there are continuous epizootic of tularemia among small mammals. In the region there are permanent natural meadow-field, floodplain- swamp and forest foci. We can assume the existence of another focus, it is a steppe type. The most active foci observed in Kashirsky, Novokhopyorsky, Petropavlosky and Ramonsky districts. The stability and activity of natural foci is
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9

Nafeyev, A. A. "PROBLEMS IN THE ORGANIZATION OF EPIDEMIC SURVEILLANCE OF LEPTOSPIROSIS IN A SUBJECT OF THE RUSSIAN FEDERATION." Epidemiology and Infectious Diseases 17, no. 1 (2012): 46–48. http://dx.doi.org/10.17816/eid40661.

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This paper characterizes the epidemic process of leptospirosis. The current new herd infections are typified by: 1) the formation of new natural foci under anthropogenic and climatic factors; 2) the change in the biocenotic structure of natural foci; 3) the formation of natural foci of mixed infectious diseases of bacterial and virus etiology; 4) the change in the epidemic potential of natural foci; 5) synathropization of infectious diseases. Few or no registered leptospirosis cases in some silent areas are frequently attributable to poor differential, including laboratory, diagnosis. The epid
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10

Popov, N. V., V. E. Bezsmertny, V. P. Toporkov, et al. "Prognosis of Epizootic Activity of Natural Plague Foci in the Russian Federation for the Year of 2010." Problems of Particularly Dangerous Infections, no. 1(103) (February 20, 2010): 24–29. http://dx.doi.org/10.21055/0370-1069-2010-1(103)-24-29.

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Short-term prognosis of epizootic activity of 11 natural plague foci in Russia for 2010 is substantiated. The analysis of the main plague carries and vectors abundance in natural foci of different types was carried out. Determined were the modern tendencies of the dynamics of epizootic activity of natural plague foci with different biocenotic structure.
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11

Balakhonov, S. V., V. M. Korzun, S. A. Kosilko, et al. "Actual Aspects of Epidemiological Well-Being Support Anti-PLAgue for Population in Altai Republic." Epidemiology and Vaccine Prevention 15, no. 4 (2016): 42–48. http://dx.doi.org/10.31631/2073-3046-2016-15-4-42-48.

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Relevance. Despite significant advances in modern medicine in the treatment of infectious diseases, the plague has not lost its relevance and is one of the socially significant epidemic threats as a particularly dangerous infection. Every year, there are nearly 2.5 thousand cases of plague in the world, and the mortality rate 7 - 13%. Goal. Analysis of the current epizootic and epidemiological situation of the plague, and to determine the optimal set of preventive measures to ensure epidemiological welfare of population of the Republic of Altai on this particularly dangerous infectious disease
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12

Mikhailova, T. V., Ya S. Podobedova, M. I. Kormilitsyna, et al. "Epizootic Activity of Natural Foci of Tularemia in Three Territories of the Arctic Zone." Epidemiology and Vaccinal Prevention 24, no. 1 (2025): 50–58. https://doi.org/10.31631/2073-3046-2025-24-1-50-58.

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Relevance. Tundra natural foci of tularemia are epizootically active. They are supported mainly by populations of endemics – ungulate and Siberian lemmings. However, studies of natural foci of tularemia in the Arctic zone were and are irregular. Recently, in connection with the intensification of economic development of the Far North, the study of the spread and circulation of natural focal infections, including tularemia, has become particularly important.Goal Target. Assessment of epizootic activity of natural foci of tundra-type tularemia in three territories of the Arctic zone: island Shok
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13

Lukshina, E. Y., V. V. Batashev, E. V. Kovalev, et al. "Results of epizootic monitoring of natural foci of particularly dangerous infections common to humans and animals in Rostov Oblast." Medical Herald of the South of Russia 12, no. 4 (2021): 83–90. http://dx.doi.org/10.21886/2219-8075-2021-12-4-83-90.

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Objective: To analyze the results of epizootic monitoring of natural foci of particularly dangerous infections common to humans and animals in Rostov Oblast to establish their activity.Materials and Methods: The data of epizootic monitoring conducted by zoologists; the results of laboratory research of field material obtained in natural foci of infectious diseases. Descriptive, zoological, genetic, serological methods, and retrospective epidemiological analysis were used.Results: The results of the conducted epizootic monitoring showed the presence in Rostov Oblast of natural foci of particula
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14

Popov, N. V., V. E. Bezsmertny, V. P. Toporkov, et al. "Prognostication of Epizootiologic Activity of Plague Natural Foci in the Russian Federation for 2009." Problems of Particularly Dangerous Infections, no. 1(99) (February 20, 2009): 11–16. http://dx.doi.org/10.21055/0370-1069-2009-1(99)-11-16.

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A short-term prognosis of plague epizootic activity in 11 natural foci in the Russian Federation for 2009 is substantiated by the authors. The present situation with the numbers of the main carriers and vectors of plague infection in diverse types of natural foci was analyzed. Some modern tendencies were noted in the dynamics of epizootic activity of the natural plague foci varying in their biocenotic structures.
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15

Pishchugin, D. Yu, S. G. Shubenkin, and O. G. Tsintsadze. "CHARACTERISTICS OF NATURAL FOCI OF TULAREMIA IN THE CRIMEA, THEIR POTENTIAL DANGER IN THE DEVELOPMENT OF THE EPIDEMIC PROCESS AND THE MAIN DIRECTIONS OF ITS PREVENTION." Marine Medicine 4, no. 3 (2018): 51–56. http://dx.doi.org/10.22328/2413-5747-2018-4-3-51-56.

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Geographical and climatic conditions of the Crimean peninsula, mammals of a particular ecosystem together with pathogens of the infection and a complex of their ectoparasites, contribute to the preservation of natural foci of tularemia and other natural focal infectious diseases on its territory. Epizootic activity of natural foci of tularemia has a welldefined periodicity and seasonality. Currently, natural foci of tularemia of the steppe type in the flat Crimea and forest type on the territory of the mountain-forest Crimea function. Three types of enzootic tularemia were identified. The epid
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16

Vynograd, Nataliya. "Natural Foci Diseases as a Stable Biological Threat." Archivum Immunologiae et Therapiae Experimentalis 62, no. 6 (2014): 445–47. http://dx.doi.org/10.1007/s00005-014-0316-8.

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17

Andreyevna, Qalandarova Madina, Nigmatullayev Bakhtiyor Alimovovich, and Mardonov Fozilbek Mardonovich. "CLASSIFICATION OF FOCUSES AND MECHANICAL TRANSMISSION OF PLANT VIRUSES." American Journal of Applied Science and Technology 4, no. 6 (2024): 19–30. http://dx.doi.org/10.37547/ajast/volume04issue06-05.

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Currently, as a result of the development of many lands, the primary virus foci have decreased. As a result, new relationships between cultivated and wild plants, pathogens and vectors have emerged. To some extent, these relations are characterized by the conceptof natural foci. Because some viruses specialize in a narrow range of plants, they do not spread at all in natural foci. Therefore, studying both theoretical and practical aspects of work in this direction with the help of new, modern methods and technologies is one of the urgent tasks before us in the near future. To date, there is in
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18

Udovikov, A. I., N. V. Popov, L. V. Samoilova, and S. I. Tolokonnikova. "Climate and Transformation of Ecosystems by the Example of Natural Plague Foci of South-East of Russia." Problems of Particularly Dangerous Infections, no. 2(112) (April 20, 2012): 21–24. http://dx.doi.org/10.21055/0370-1069-2012-2(112)-21-24.

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Shown was the influence of modern day warming and some other factors on natural plague foci of the European South-East of Russia. Analyzed were the basic mechanisms of transformation of biocenotic structure of natural foci complexes. It was shown that the tendency of gradual change of dominant carriers species would be preserved due to further warming of climate. As a result, the expansion of polyhostal natural foci of plague of semidesert type would be continued.
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19

Zhiltsova, A. Yu, Yu M. Tokhov, L. I. Shaposhnikovа, and A. F. Manucharyan. "GAMASE MITES (GAMASINA) OF THE NESTS COMMON VOLE OF THE PRISEVAN PLAGUE MESO-FOCI, THE TRANSCAUCASIAN HIGH-MOUNTAIN NATURAL PLAGUE FOCI." Medical parasitology and parasitic diseases, no. 1 (2024): 3–7. http://dx.doi.org/10.33092/0025-8326mp2024.1.3-7.

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The paper highlights new data on the species composition of gamasid ticks living in the nests of the common vole of the Prisevan meso-foci of the Transcaucasian high-mountain natural plague foci of the Republic of Armenia. As a result of the research conducted in the studied territory, the fauna of gamasid ticks is represented by nine species, including two species that were not previously found in the nests of the common vole. Key words: gamasid ticks, common vole, parasitic arthropods, Prisevan meso-foci, Transcaucasian high-mountain natural plague foci.
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20

Popov, N. V., G. A. Eroshenko, I. G. Karnaukhov, et al. "Epidemiological and Epizootic Situation on Plague in the Russian Federation and Forecast for Its Development for 2020–2025." Problems of Particularly Dangerous Infections, no. 1 (April 23, 2020): 43–50. http://dx.doi.org/10.21055/0370-1069-2020-1-43-50.

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Objective of the investigation was to assess epidemiological and epizootiological conditions in natural plague foci of the Russian Federation, neighboring states and foreign countries in 2019. Negative effect of the current climate warming on the state of parasitic systems of natural foci with circulation of plague microbe of the main subspecies, medieval biovar, phylogenetic branch 2.MED1 is emphasized. In 2019, local plague epizooties were registered in the territory of two (Gorno-Altai high-mountain and Tuva mountain) out of 11 natural plague foci of the Russian Federation. The total area o
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21

Rodionov, Alexander P., Elena A. Artemeva, Lilia A. Melnikova, Maxim A. Kosarev, and Svetlana V. Ivanova. "Features of anthrax natural foci and Bacillus anthracis ecology." Veterinary Science Today, no. 2 (2021): 151–58. http://dx.doi.org/10.29326/7304-196x-7021-2-37-151-158.

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22

Rodionov, A. P., E. A. Artemeva, L. A. Melnikova, M. A. Kosarev, and S. V. Ivanova. "Features of anthrax natural foci and Bacillus anthracis ecology." Veterinary Science Today, no. 2 (July 1, 2021): 151–58. http://dx.doi.org/10.29326/2304-196x-2021-2-37-151-158.

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Anthrax remains a global problem, both for veterinary and human medicine, due to the wide spread of its soil foci throughout the world. The ability to sporulate is the main feature of Bacillus anthracis, which allows the pathogen to persist in the environment for a long time. Understanding the ecology of B. anthracis is essential for successful control of this infection. This review analyzes the data from the global literature, reflecting the modern understanding of the vital functions of the anthrax agent in various ecological niches. As a result of the work, it was revealed that many links i
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23

Shpitz, B., K. Hay, A. Medline, et al. "Natural history of aberrant crypt foci. A surgical approach." European Journal of Gastroenterology & Hepatology 8, no. 11 (1996): 1138. http://dx.doi.org/10.1097/00042737-199611000-00027.

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24

Rudakova, S. A., L. D. Schuchinova, L. V. Schuchinov, N. V. Rudakov, A. F. Lubenko, and M. G. Mal’Kova. "Modern Condition of Natural foci Tick-Borne Infections in Altay Republic." Epidemiology and Vaccine Prevention 14, no. 1 (2015): 17–19. http://dx.doi.org/10.31631/2073-3046-2015-14-1-17-19.

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The presence of common vectors of various pathogens determines the high prevalence of combined natural foci of tick-borne infections in Altay Republic. The current state of natural foci is presented in terms of the spectrum of key pathogens transmitted by ticks. Morbidity of major diseases transmitted by the bite of ticks was analyzed.
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Rusev, I. T. "Вплив антропогенної трансформації території Дунай-Дністровського межиріччя на природну вогнищевість туляремії". Visnyk of Dnipropetrovsk University. Biology, medicine 2, № 1 (2011): 107–13. http://dx.doi.org/10.15421/021117.

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The paper is devoted to the problem of occurrence of bacteria Francisella tularensis in steppe coastal zone of the Black Sea west part in the second half of XX century. The key factor decreasing the activity of tularaemia natural foci is anthropogenic influence. Resumed activity of natural foci appeared after implementation of big irrigation and drainage construction in former USSR – building of the Danube-Dniester-Dnepr irrigation system resulted in forming new environmental conditions as well as corridors for tularaemia distribution. The practical recommendation is to implement the eco-epizo
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Ibrahimova. "Role of Domestic Carnivores in the Formation of Parasitic Foci in the Territory of Azerbaijan." Bulletin of Science and Practice 7, no. 4 (2021): 52–57. http://dx.doi.org/10.33619/2414-2948/65/07.

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Domestic carnivores play an important role in the transfer of pathogenic helminths from natural foci to synanthropic ones and in the formation of strong parasitic foci for humans and domestic animals. The extensiveness and powerful natural and synanthropic and mixed foci of some main helminth infectors of domestic carnivores have been specified. Upon studying the role of carnivores in the creation and improvement of foci firstly in Azerbaijan. For the first time, it was found out that domestic carnivores are the new host for 14 types of helminths infected with wild animals have also influence
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Ibrahimova, R. "The Role of Domestic Carnivores in the Formation of Parasitic Foci in the Territory of Azerbaijan." Bulletin of Science and Practice 6, no. 4 (2021): 52–57. https://doi.org/10.33619/2414-2948/65/07.

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Domestic carnivores play an important role in the transfer of pathogenic helminths from natural foci to synanthropic ones and in the formation of strong parasitic foci for humans and domestic animals. The extensiveness and powerful natural and synanthropic and mixed foci of some main helminth infectors of domestic carnivores have been specified. Upon studying the role of carnivores in the creation and improvement of foci firstly in Azerbaijan. For the first time, it was found out that domestic carnivores are the new host for 14 types of helminths infected with wild animals have also influence
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28

Abdel, Z. Zh, Т. V. Меkа-Меchеnkо, А. А. Аbdirasilova, et al. "Biological properties and molecular and genetic characteristics of plague microbe strains circulating in sandy natural plague foci of the Republic of Kazakhstan." Bacteriology 5, no. 3 (2020): 25–33. http://dx.doi.org/10.20953/2500-1027-2020-3-25-33.

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Since 2010, an active course of epizootics with the release of the plague pathogen, isolated from hosts and vectors has been established in 8 autonomous foci of the plague from 14 autonomous foci of the Central Asian plague focus in Kazakhstan. It was necessary to take into account the parameters of variability of the main component of the parasitic system – the plague microbe in the process of certification of landscape and epizootological zoning of natural foci of plague in Kazakhstan. The aim of the work was to study the phenotypic and genetic properties of strains of the plague microbe iso
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29

Breneva, N. V., S. V. Balakhonov, A. Ya Nikitin, et al. "Detecting and predicting risks relayed to spread of natural foci infections on flood-affected territories in Irkutsk region." Health Risk Analysis, no. 2 (June 2021): 94–104. http://dx.doi.org/10.21668/health.risk/2021.2.09.

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In summer 2019 in western Irkutsk region abundant and long rainfall caused a catastrophic flood that became a federal emergency. It resulted in a threat that natural infection foci would be activated in that emergency zone; given that, the Irkutsk Anti-plague Institute, together with Rospotrebnadzor territorial offices and regional veterinary authorities, conducted an epizootologic-epidemiologic study on affected territories in order to detect and predict possible epidemiologic risks. Totally, the study covered 30 socially significant objects and natural biotopes in three mu-nicipal districts
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Breneva, N. V., S. V. Balakhonov, A. Ya Nikitin, et al. "Detecting and predicting risks relayed to spread of natural foci infections on flood-affected territories in Irkutsk region." Health Risk Analysis, no. 2 (June 2021): 94–104. http://dx.doi.org/10.21668/health.risk/2021.2.09.eng.

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In summer 2019 in western Irkutsk region abundant and long rainfall caused a catastrophic flood that became a federal emergency. It resulted in a threat that natural infection foci would be activated in that emergency zone; given that, the Irkutsk Anti-plague Institute, together with Rospotrebnadzor territorial offices and regional veterinary authorities, conducted an epizootologic-epidemiologic study on affected territories in order to detect and predict possible epidemiologic risks. Totally, the study covered 30 socially significant objects and natural biotopes in three mu-nicipal districts
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31

Popov, N. V., I. G. Karnaukhov, A. A. Kuznetsov, et al. "Improvement of Epidemiological Surveillance of Natural Plague Foci of the Russian Federation and the Forecast of Their Epizootic Activity for 2023." Problems of Particularly Dangerous Infections, no. 1 (April 29, 2023): 67–74. http://dx.doi.org/10.21055/0370-1069-2023-1-67-74.

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The aim of the work was to assess the epidemic situation on plague in the world and epizootic activity of natural plague foci of the Russian Federation in 2022. Following the implementation of comprehensive preventive interventions plans, there was a decrease in the epizootic activity of the Gorno-Altai high-mountain and Tuva mountain natural foci, the cessation of plague epizootics in the Central Caucasian high-mountain focus. The total area of epizootics in the Russian Federation in 2022 reached 248.3 km2, which is 7 times less than in 2021. Infected animals were not found in the Tersko-Sunz
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Alemasova, S. V., V. A. Boiko, N. I. Boroznov та ін. "Сhange of 1xodidae population in i connection with anthropogenic transformation of landscapes on the boundary of forest and forest-steppe zones of the middle volga region". Kazan medical journal 82, № 1 (2021): 57–60. http://dx.doi.org/10.17816/kazmj72000.

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Within the last 60 years in the region studied the joint inhabitance zone of I. ricinus and I. persulcatus displaced in the North-East direction and the D. reticulatus natural habitat significantly expanded to the North- West. These regional changes depend on the temperature rise of climate, the decrease of precipitation and change of species and age of afforestation. Decay of epidemiologic stress of natural foci of the tick borne encephalitis, Lyme disease, and strengthening the epizootologic valency of foci of pyroplasmosis, nuttaliosis as well as epidemiologic f importance of natural foci o
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Meka-Mechenko, T. V., U. A. Izbanova, Z. Zh Abdel, et al. "Genotypic properties of collection plague microbes strains from the natural plague foci of Kazakhstan." Acta Biomedica Scientifica 7, no. 6 (2022): 111–18. http://dx.doi.org/10.29413/abs.2022-7.6.11.

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Background. Epidemiological and epizootological monitoring of natural plague foci requires an integrated approach to solving problems, taking into account the phenotypic and genetic variability of Y. pestis and zoning of natural plague foci. The introduction of a new molecular genetic methodology aimed at studying the genomic polymorphism of the plague pathogen provides reliable results for the differentiation of not only groups, but also individual strains.The aim. To determine the genotypes of the plague microbe from different autonomous foci of the Republic of Kazakhstan.Materials and metho
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Medvedev, S. G., D. B. Verzhutsky, and B. K. Kotti. "Species of the genus xenopsylla (siphonaptera; pulicidae) as vectors of plague infection in its natural foci." Паразитология 57, no. 4 (2023): 267–309. http://dx.doi.org/10.31857/s0031184723040014.

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In the review, the peculiarities of distribution, host-parasite relations, and significance as vectors of plague of the fleas of the genus Xenopsylla (Pulicidae) are analyzed. Spatial distribution of plague foci all over the world and the role of this genus fleas in circulation of the plague pathogen in various regions of the planet are considered. It is shown that out of at least 255 existing natural foci of plague around the world in which the circulation of the pathogen occurs independently of the other foci, in 114 foci the only main vectors or members of the main vector pool are the fleas
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35

Kulikalova, E. S., A. V. Mazepa, A. K. Syngeeva, et al. "Present-Day Epidemiological-Epizootological Peculiarities of Natural Tularemia Foci in Altai." Epidemiology and Vaccinal Prevention 18, no. 4 (2019): 25–33. http://dx.doi.org/10.31631/2073-3046-2019-18-4-25-33.

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RelevanceNatural tularemia foci are widespread in Altai Krai and Republic Altai and characterized by high functional stability.Aim.To study modern epidemiological and epizootological features of natural foci of tularemia in the Altai region Russia.Materials and MethodsThe current state of small mammal number in the region is examined. Results of complex studying of 14 Francisella tularensis strains isolated in Republic Altai from 1950 to 2015 (from the collection of Museum of live cultures in Irkutsk Antiplague Research Institute of Rospotrebnadzor) and 21 strains isolated in 2016–2018 in the
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36

Mikhailova, T. V., L. G. Emelyanova, Y. S. Podobedova, et al. "Combined Foci of Tularemia, Leptospirosis and Hemorrhagic Fever with Renal Syndrome in the South of the Arkhangelsk region." Epidemiology and Vaccinal Prevention 21, no. 4 (2022): 60–69. http://dx.doi.org/10.31631/2073-3046-2022-21-4-60-69.

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Relevance. Combined foci of zoonotic infections are found in all regions of the Russian Federation. A feature of combined foci is the common biocenosis for populations of pathogens of various etiologies (bacteria, viruses, parasitic infections) and the formation of natural foci by them. Aim. Epizootological study of the territory in the south of the Arkhangelsk region for the presence of combined foci of zoonotic infections (tularemia, leptospirosis and hemorrhagic fever with renal syndrome – HFRS). Materials and methods. 135 small mammals were captured and examined in the Ustyansky district o
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Matrosov, A. N., A. A. Kuznetsov, T. V. Knyazeva, et al. "Modern Conception of the Control over the Abundance of Carriers and Vectors of Plague in the Territory of the Russian Federation." Problems of Particularly Dangerous Infections, no. 2(112) (April 20, 2012): 16–20. http://dx.doi.org/10.21055/0370-1069-2012-2(112)-16-20.

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Disinfestation and deratization remain the main ways of non-specific disease prophylaxis in natural plague foci. Modern strategies, tactics, methods and means of control over carriers and vectors of plague and associated infectious diseases are selected with due consideration to epidemiological potential of territories, epizootic activity of a foci, peculiarities of population ecology of animals that are of a medical significance, preservation of biodiversity in natural ecosystems, and the requirements for human and natural environments protection from pollutants.
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38

Popov, N. V., E. V. Kouklev, V. P. Toporkov, et al. "Combined Natural Foci of Bacterial, Rickettsial and Viral Infectious Diseases in the North-West Precaspian Region." Problems of Particularly Dangerous Infections, no. 1(103) (February 20, 2010): 44–47. http://dx.doi.org/10.21055/0370-1069-2010-1(103)-44-47.

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Presence of combined natural foci of plague, tularemia, Crimean-Congo hemorrhagic fever, West-Nile encephalitis, Astrakhan spotted fever in the North-West Precaspian region was substantiated. Influence of anthropogenic and climatic conditions in formation of combined natural foci of infectious diseases of bacterial, rickettsial and viral etiology was pointed out. Up-to-date potential epidemic danger of the territories under consideration was evaluated.
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39

Popov, N. V., I. G. Karnaukhov, A. A. Kuznetsov, et al. "Enhancement of Epidemiological Surveillance in Natural Plague Foci of the Russian Federation and Forecast of Epizootic Activity for 2022." Problems of Particularly Dangerous Infections, no. 1 (April 19, 2022): 35–42. http://dx.doi.org/10.21055/0370-1069-2022-1-35-42.

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The aim of the research was to assess epizootic activity of natural plague foci in the Russian Federation in 2021 and provide a prognosis for 2022. Activation of epizootic process has been detected in Central-Caucasian high-mountain natural plague focus after a recess since 2007. Local epizootics persist to develop in Tuva Mountain and Gorno-Altai highmountain plague foci. Total area of epizooties in Russia in 2021 amounted to 1649.5 km2. 28 plague microbe strains were isolated. Animals infected with plague were not found in Tersko-Sunzhensky low-mountain, Dagestan plain-piedmont, Precaspian n
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40

Sludsky, A. A., A. V. Boiko, M. N. Lyapin, and M. A. Tarasov. "Population Approach to Determination of the Borders and Number of Natural Plague Foci." Povolzhskiy Journal of Ecology, no. 4 (February 14, 2020): 493–502. http://dx.doi.org/10.35885/1684-7318-2019-4-493-502.

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Population approach to determination of the borders and number of natural plague foci implies the specialists’ acceptance of the concept that the existence of a natural plague focus is always provided by a single population of the main carrier. Motivation for our discussion of such an approach was the data of a long-term study of the Hissar natural plague focus (Tadzhikistan). The area of the focus was only 300 km2 and its functioning was maintained by a single, relatively small population of Microtus carruthersi (Thomas, 1909) – the main carrier of plague. The Hissar mountain range territorie
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41

Pikula, J., M. Beklova, Z. Holesovska, B. Skocovska, and F. Treml. "Ecology of brucellosis of the European hare in theCzechRepublic ." Veterinární Medicína 50, No. 3 (2012): 105–10. http://dx.doi.org/10.17221/5602-vetmed.

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A geographic information system was used for the analysis of ecological conditions of distribution of natural foci of brucellosis in the European hare (Lepus europaeus) and their long-term persistence in the Czech Republic. The European hare is a reservoir host of Brucella suis biotype 2. A close correlation was found between the geographic distribution and numbers of natural foci of brucellosis in the Czech Republic in 1971 to 1985 and 1986 to 2000 (r = 0.65, n = 814, P = 0.01). Natural foci of brucellosis were persistent, but not stationary, over the period of 30 years. Natural foci of bruce
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42

Bakhtin, L. V., A. M. Romanov, and D. N. Tokaev. "PRESENCE OF TECHNOGENIC STRUCTURES IN NATURAL ELECTRICAL FIELD." NNC RK Bulletin, no. 2 (June 30, 2019): 69–74. http://dx.doi.org/10.52676/1729-7885-2019-2-69-74.

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A methodology of self-potential that allows to confidently detect sites of underground water movements, including the ones near the foci of underground nuclear explosions (UNE), based on the contrast and intensity of self-potential features, has been developed. The main features of distribution are the decrease of self-potential values at the sites of the source and narrowing of the underground water flows and increase of self-potential values at the sites of slowness and widening of these flows. At the UNE sites the nature of self-potential is complicated – linearly stretched in different dir
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43

Bondarenko, G. A., I. A. Solovyеva, T. I. Trukhina, and D. A. Ivanov. "Features of natural foci of trichinosis in the Amur region." "Veterinary Medicine" Journal 24, no. 5 (2021): 35–39. http://dx.doi.org/10.30896/0042-4846.2021.24.5.35-39.

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44

Burdakov, A. V., and A. O. Ukharov. "INFORMATION TECHNOLOGY APPLICATION FOR NATURAL FOCI INFECTIONS MONITORING AND PREDICTION." Russian Journal of Infection and Immunity 8, no. 4 (2019): 544. http://dx.doi.org/10.15789/2220-7619-2018-4-4.6.

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45

Nechaev, V. V., A. A. Yakovlev, A. N. Uskov, et al. "Urgent natural foci infections transmitted by ticks in Saint-Petersburg." Journal Infectology 10, no. 4 (2018): 104–15. http://dx.doi.org/10.22625/2072-6732-2018-10-4-104-115.

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46

Li, Zhenjun, Jiafu Jiang, Xiangdong Ruan, et al. "The zoonotic and natural foci characteristics of SARS-CoV-2." Journal of Biosafety and Biosecurity 3, no. 1 (2021): 51–55. http://dx.doi.org/10.1016/j.jobb.2021.06.002.

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47

Kotti, B. K., and M. V. Zhilzova. "The Significance of Fleas (Siphonaptera) in the Natural Plague Foci." Entomological Review 100, no. 2 (2020): 191–99. http://dx.doi.org/10.1134/s0013873820020074.

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48

Brinkley, Catherine, Peter Nolskog, Irina Golovljova, Åke Lundkvist, and Tomas Bergström. "Tick-borne encephalitis virus natural foci emerge in western Sweden." International Journal of Medical Microbiology 298 (September 2008): 73–80. http://dx.doi.org/10.1016/j.ijmm.2007.12.005.

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49

Bek, N., Z. Kushnir, O. Toporovich, and I. Genyk. "Epidemiologic monitoring in natural foci of Q fever in Ukraine." International Journal of Infectious Diseases 79 (February 2019): 66–67. http://dx.doi.org/10.1016/j.ijid.2018.11.171.

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Hatsiy, L., O. Velychko, L. Vasiunets, and O. Semenyshyn. "Study of natural foci of Tularemia in Lviv Oblast, Ukraine." International Journal of Infectious Diseases 79 (February 2019): 142–43. http://dx.doi.org/10.1016/j.ijid.2018.11.348.

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