Problems of Particularly Dangerous Infections最新文献

{"title":"Geno-Species Composition of Borrelia Circulating on the Black Sea Coast of the Krasnodar Territory","authors":"O. A. Zaitseva, A. Volynkina, O. V. Vasil’eva, E. V. Chekhvalova, A. V. Kolosov, D. A. Prislegina, E. Manin, A. Kulichenko","doi":"10.21055/0370-1069-2024-1-141-147","DOIUrl":"https://doi.org/10.21055/0370-1069-2024-1-141-147","url":null,"abstract":"The aim of the study was to assess the current epidemiological situation on Ixodidae tick-borne borreliosis (ITBB) (2017–2022) on the Black Sea coast of the Krasnodar Territory, to study the species composition of Borrelia.Materials and methods. Ixodidae ticks, Ixodes ricinus, Haemaphysalis concinna, H. inermis, Rhipicephalus sanguineus, were examined for infection with tick-borne borreliosis pathogens, followed by DNA sequencing of isolates. Species identification of Borrelia was carried out based on analysis of the nucleotide sequence of the 16S rRNA gene fragment using BLAST algorithm. Additionally, the OspC genotype was determined for isolates of pathogenic genovariants through comparing the obtained sequences with reference ones in the MEGA 5 program. The data were processed applying the cartographic method using the QGIS 2.18 software.Results and discussion. Between 2017 and 2022, 101 cases were registered on the Black Sea coast of the Krasnodar Territory, which accounted for 1.6 % of all ITBB cases in the Krasnodar Territory. The number of complaints with tick bites in Sochi was up to 191.4 per 100 thousand population. During the study, the predominant Borrelia geno-species on the territory of the Black Sea coast of the Krasnodar Territory was determined using sequencing – Borrelia lusitaniae (78.1 %). The circulation of geno-species B. garinii (6.8 %), B. valasiana (5.7 %), B. afzelii (3.6 %), B. miyamotoi (2.6 %), B. tanukii, B. bissettii (1.6 % each) was also observed. For Borrelia pathogenic species, appurtenance to OspC geno-groups was ascertained: four isolates were assigned to invasive OspC geno-groups, of which three B. afzelii isolates were genogroup A8, one B. garinii isolate was G7. High rate of infection of ticks with Borrelia was recorded in the surveyed area (up to 94.5 %). Borrelia of pathogenic species account for only 10.4 % of the total number of isolates studied. Mostly, genovariants that rarely cause diseases in humans (B. lusitaniae, B. valasiana, B. bissettii) and non-pathogenic Borrelia (B. tanukii) were found, which indicates a low risk of infection with ITBB pathogens.","PeriodicalId":516710,"journal":{"name":"Problems of Particularly Dangerous Infections","volume":"11 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140741966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection of Rickettsia species in rodents collected in the Northern provinces of Vietnam, 2020–2022","authors":"Van Trinh Toan, Viet Vo Cuong, Van Nguyen Dat, Anh Thi Phan Lan, Ngoc Nguyen Tan, Viet Pham Hung, Anh Thi Phan Lan","doi":"10.21055/0370-1069-2024-1-162-167","DOIUrl":"https://doi.org/10.21055/0370-1069-2024-1-162-167","url":null,"abstract":"Rickettsiae, which are obligate intracellular bacterial parasites, have a life cycle commonly associated with arthropod vectors and animal hosts. Rodents are recognized as their natural reservoir hosts and play a role in transmitting the bacteria to humans through arthropod vectors. The true extent of rickettsial infections in Vietnam remains underestimated due to a limited understanding of the disease’s epidemiology, resulting in a significant public health burden.The aim of this investigation was to assess the prevalence of Rickettsia in wild-living rodents in Dien Bien, Son La, and Phu Tho provinces of Northern Vietnam between 2020 and 2022.Materials and methods. A total of 396 wild-living rodents were collected from the Northern provinces of Vietnam during 2020–2022. Real-time polymerase chain reaction (PCR) was employed to detect the percentage of Rickettsia-positive specimens. Subsequently, the ompB and 17kDa genes were extracted, amplified, and sequenced from the Rickettsia-positive rodents.Results and discussion. Among the 396 rodents examined, the majority were Rattus norvegicus (56.1%), followed by R. tanezumi (37.4%), R. nitidus (2.5%), and R. germaini (1.8%). R. korodentsensis and R. argentiverter constituted the remaining rodents, accounting for 2.2% of the total. The real-time PCR analysis revealed that 27 blood samples out of the 396 rodent samples collected, tested positive for Rickettsia (6.81%). R. germaini was shown to have the highest positive rate 1/8 (12.5%), followed by R. nitidus 1/10 (10.0%), R. tanezumi 14/149 (9.5%), and R. norvegicus 11/222 (4.9%). No other tick-borne pathogens were detected in any of the provinces. Sequencing of the positive samples as regards the ompB and 17kDa genes revealed the closest relation to R. felis. These findings highlight the potentially high risk of R. felis infection in humans and animals within the studied areas.","PeriodicalId":516710,"journal":{"name":"Problems of Particularly Dangerous Infections","volume":"60 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140743157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Experience in Using the MaxEnt Model to Rank the Territory of the Caspian Sandy Natural Plague Focus (43) according to the Risk of Epizooty Registration","authors":"U. Ashibokov, V. Dubyansky, O. Semenko, A. Gazieva, O. A. Belova, A. A. Kes’yan, A. K. Khalidov, A. A. Vetoshkin, N. V. Viktorova, A. A. Kulik","doi":"10.21055/0370-1069-2024-1-135-140","DOIUrl":"https://doi.org/10.21055/0370-1069-2024-1-135-140","url":null,"abstract":"The aim of this work was to rank the territory of the Caspian sandy natural plague focus (43) by the risk of epizooty emergence using the MaxEnt model.Materials and methods. The archival data on epizootic manifestations of plague over the past 35 years, aggregated by the Stavropol Anti-Plague Institute of the Rospotrebnadzor, the Dagestan, Elista, Astrakhan PCSs of the Rospotrebnadzor, were used for model design. 615 archive plague detection points were converted into the coordinate system (1980–2015). 87 publicly available bioclimatic variables BioClim were deployed to construct the MaxEnt model. Applied weather and climatic factors of the BioClim database are averaged over a multiyear period.Results and discussion. The MaxEnt model has a very high degree of reliability (AUC=0.975), with a sufficiently high predictive ability (AUC=0.973). According to the generated model, the Caspian sandy natural plague focus has a heterogeneous structure in terms of the probability of epizooty registration and can be divided into five zones. The most significant factors for the model are the following indicators: the average temperature of the wettest quarter, solar radiation in November, the average temperature of the driest quarter, the amount of precipitation in the coldest quarter, wind speed in May, the amount of precipitation in the wettest quarter, and the average air temperature in September. The data obtained allow for targeted search for plague epizootics and can be used to adjust boundaries of a surveyed natural focus in the future.","PeriodicalId":516710,"journal":{"name":"Problems of Particularly Dangerous Infections","volume":"12 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140742393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hantavirus Infections: Review of the Epidemiological Situation around the World. Analysis of the Epidemiological Situation on Hemorrhagic Fever with Renal Syndrome in the Russian Federation in 2023 and Forecast of Its Development for 2024","authors":"T. A. Savitskaya, A. V. Ivanova, A. A. Zubova, I. Reshetnikova, G. Isaeva, V. A. Trifonov, S. V. Magerramov, K. S. Martsokha, D. V. Trankvilevsky","doi":"10.21055/0370-1069-2024-1-113-124","DOIUrl":"https://doi.org/10.21055/0370-1069-2024-1-113-124","url":null,"abstract":"The paper describes the epidemiological situation in the countries of the world in terms of the incidence of Hantavirus diseases. The results of an epidemiological analysis of the incidence of hemorrhagic fever with renal syndrome (HFRS) in the Russian Federation in 2023 by federal districts are presented and a forecast for 2024 is made. In 2023, 5 093 cases of HFRS were registered in the Russian Federation (3.47 per 100 thousand population). The incidence was reported in 7 out of 8 federal districts of the country. The age structure was dominated by people in the 30–59 age category (65.7 %); 247 cases of the disease were noted among children under 17 years of age. The proportion of the male population was 70.3 %. 63.2 % of the total number of cases was registered among the urban residents. The mortality rate was at the level of 0.49 % – 25 lethal outcomes. Analysis of the data has revealed a decrease in the incidence of HFRS in Russia by 27.2 % as compared to the previous year. However, the data from epizootiological monitoring and the results of laboratory research of field material indicate a continuing tense situation in the country as a whole. In a number of regions, a high risk of complications of the epidemiological situation is predicted (mainly, in the constituent entities of the Volga and Central Federal Districts). Moderate risks of developing local complications of the epidemiological situation at the level of long-term average morbidity are expected to be realized in the entities of the Northwestern, Ural and Far Eastern Federal Districts. Sporadic cases of the disease in the territory of the Southern Federal District are not excluded. The aggravation of the situation on HFRS in the territory of the North-Caucasian and Siberian Federal Districts is not anticipated in 2024.","PeriodicalId":516710,"journal":{"name":"Problems of Particularly Dangerous Infections","volume":"22 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140741311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bacterial Vaccines with Regulated Delayed Attenuation","authors":"M. E. Platonov, N. A. Lipatnikova, S. V. Dentovskaya, A. P. Anisimov","doi":"10.21055/0370-1069-2024-1-59-66","DOIUrl":"https://doi.org/10.21055/0370-1069-2024-1-59-66","url":null,"abstract":"Over the past 200 years since the moment of E. Jenner’s discovery, vaccination continues to be the leading strategy for protection against infectious diseases, but commercially available live attenuated and inactivated vaccines have a number of serious drawbacks. Bacterial strains should be completely attenuated in live vaccines, while maintaining a high degree of immunogenicity. However, the majority of attenuation methods currently used makes potential vaccine strains more susceptible to the action of various host defenses, reducing the ability to persist in the body of the vaccinated individual in quantities and for periods sufficient for formation of long-term and intense immunity. Inactivation of microorganisms underlying the production of killed vaccines, applying various reagents and /or physical factors, can disrupt the native conformation of antigenic epitopes located on bacterial cell surface, which leads to a decrease in immunogenicity. This review examines a promising biotechnological platform for the development of vaccines based on the methodology of regulated delayed gene expression and repression of genes, which was developed to resolve the above-mentioned contradictions.","PeriodicalId":516710,"journal":{"name":"Problems of Particularly Dangerous Infections","volume":"24 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140753345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Epidemiological Situation on Plague around the World. Forecast of Epizootic Activity of Natural Plague Foci in the Russian Federation for 2024","authors":"N. V. Popov, I. G. Karnaukhov, A. A. Kuznetsov, A. Matrosov, A. V. Ivanova, K. S. Martsokha, E. Kuklev, V. M. Korzun, D. Verzhutsky, E. V. Chipanin, A. V. Kholin, A. A. Lopatin, V. Dubyansky, U. Ashibokov, A. Gazieva, I. Kutyrev, S. V. Balakhonov, A. Kulichenko, V. V. Kutyrev","doi":"10.21055/0370-1069-2024-1-67-75","DOIUrl":"https://doi.org/10.21055/0370-1069-2024-1-67-75","url":null,"abstract":"The aim of the review was to assess the epidemiological situation in natural plague foci in the Russian Federation, near and far abroad countries in 2023 and to forecast their epizootic activity for 2024. In 2023, cases of plague were registered in five countries worldwide: the Democratic Republic of the Congo (60 cases), the Republic of Madagascar (14), the United States of America (2), the People’s Republic of China (3), and Mongolia (5). A total of 84 cases of plague were recorded, of which 22 (26.2 %) were fatal. In the Russian Federation, in 2023, epidemic risks in epizootically active natural foci were significantly reduced due to the implementation of a set of preventive measures carried out by Rospotrebnadzor institutions, which was the guarantor of ensuring epidemiological well-being as regards plague. Plague epizootics were detected on the territory of two (Gorno-Altai high-mountain and Tuva mountain) out of 11 natural plague foci in the Russian Federation in 2023. Epizootics were reported on the territory of the Kosh-Agach district of the Altai Republic and the Mongun-Taiginsky kozhuun of the Tuva Republic. The total area of epizootics was 731.2 km2 (in 2022 – 248.3 km2). In total, 55 cultures of the antique biovar of the main subspecies Yersinia pestis pestis were isolated in 2023 (19 in 2022). The forecast for continuation of the tense epidemiological situation in the territory of the Altai and Tuva Republics in 2024 is substantiated. The trend of sustained growth in the epizootic potential of the East Caucasus high-mountain and Dagestan plain-piedmont plague foci is outlined. The prospects for introducing an automated electronic system for assessing the epidemic potential of natural plague foci into practice are explained.","PeriodicalId":516710,"journal":{"name":"Problems of Particularly Dangerous Infections","volume":"35 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140752653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Epidemiological Situation on Tick-Borne Encephalitis in the Russian Federation in 2014–2023 and Short-Term Forecast of the Incidence for 2024","authors":"A. Y. Nikitin, E. I. Andaev, M. I. Tolmacheva, I. D. Zarva, A. N. Bondaryuk, E. V. Yatsmenko, V. A. Matveeva, E. A. Sidorova, R. V. Adel’shin, V. Y. Kolesnikova, S. V. Balakhonov","doi":"10.21055/0370-1069-2024-1-48-58","DOIUrl":"https://doi.org/10.21055/0370-1069-2024-1-48-58","url":null,"abstract":"The aim of the review was to conduct a comparative analysis of the epidemiological situation on tick-borne encephalitis (TBE) over 2014–2023 in the constituent entities of the Russian Federation located in the European and Asian parts of the country and to give a forecast of incidence for 2024. The incidence of TBE in 2023 only marginally decreased as compared to the peak values in 2022, which leveled down the ten-year trend towards reduction. Grouping of the entities of the Russian Federation according to the average incidence of TBE over a decade made it possible to classify 17 of them as regions of low, 15 – of medium, and 17 – of high epidemiological risk. In general, the epidemiological situation regarding TBE is more unfavorable in the Asian part of the country. A list of species of Ixodidae ticks, the main vectors of the tick-borne encephalitis virus, is provided, as well as subtypes and genetic variants of the latter, identified in the European and Asian parts of the country. The peculiarities of the epidemiological situation on TBE and the scope of preventive measures undertaken in Russia in 2023 are considered. It is shown that there are no clearly outlined trends in the nature of changes in the incidence of TBE in endemic federal districts and entities of the country, and the expected incidence rates in 2024 will remain at the long-term average level.","PeriodicalId":516710,"journal":{"name":"Problems of Particularly Dangerous Infections","volume":"57 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140784345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Variability of omp25 and omp2a Genes in Brucella Strains of Different Taxonomic Position","authors":"N. A. Osina, E. Boolgakova, A. G. Osin, I. G. Shvidenko, S. A. Shcherbakova","doi":"10.21055/0370-1069-2023-4-125-134","DOIUrl":"https://doi.org/10.21055/0370-1069-2023-4-125-134","url":null,"abstract":"The aim of the study was to identify structural differences in the Brucella omp25 and omp2a genes, which make it possible to determine their taxonomic position.Materials and methods. The objects of the study were the nucleotide sequences of the complete genomes of 48 Brucella strains presented in the GenBank NCBI database. To assess sequence homology, the BLAST algorithm and the MEGA 11 program were used.Results and discussion. In 13 species of Brucella and Brucella spp. with unknown species appurtenance, HindIII, EcoRV and EcoRI, AluI restriction profiles of genome regions have been reproduced in silico, including, omp25 and omp2a genes, flanked by primers 25A-25B and 2AB-2AA, respectively. In the omp25 gene, 11 non-synonymous and 24 synonymous mutations have been detected; two deletions: ∆103–108 bp – in В. nosferati, ∆562–597 bp – in В. Ovis; and ACT insertion after 585 bp – in В. vulpis. The variability of the omp2a gene in the studied Brucella strains was significantly higher. 138 SNPs have been identified, of which 60 lead to amino acid substitutions, 2 – form stop codons, and an additional deletion ∆424–561 bp – in В. abortus 1, 2, 4 biovars. Single mutations in the omp2a and omp25 genes had both group specificity – for several species, and unique – for a specific species or biovar of the pathogen. Allelic profiles of the omp25 and omp2a genes have greater resolution than their restriction profiles studied. The identified changes in the structure of the omp25 and omp2a genes correlate with the circulation of individual Brucella species and biovars in the organism of certain carriers. These genes show the presence of deletions, insertions and single polymorphic nucleotides specific to species, groups of species and, in some cases, biovars of the pathogen.","PeriodicalId":516710,"journal":{"name":"Problems of Particularly Dangerous Infections","volume":"51 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140510993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of Cholera Bacteriophages Mixture Safety on an Experimental Animal Model","authors":"A. Tyurina, N. E. Gaevskaya, E. A. Sinel’nik, I. A. Ivanova, A. Filippenko, N. D. Omel’chenko, A. Trufanova, M. Pogozhova, A. O. Anoprienko, N. Pasyukova","doi":"10.21055/0370-1069-2023-4-160-162","DOIUrl":"https://doi.org/10.21055/0370-1069-2023-4-160-162","url":null,"abstract":"The spread of Vibrio cholerae strains with multiple antibiotic resistance necessitates the search for alternatives to antibiotics. Cholera bacteriophages can become such means.The aim of the work was to study the safety of a mixture of cholera bacteriophages using an experimental animal model.Materials and methods. We used a composition based on cholera phages Rostov-M3, Rostov-13, FB1. The toxicity of the drug, cytotoxic and apoptogenic effects in experimental animals were assessed.Results and discussion. It has been shown that a single administration of the maximum defined dose of the mixture of phages does not cause negative effects on the body of laboratory animals. Comparison with the control group has not revealed statistically significant differences in the histological picture in the organs of the experimental animals after long-term administration of the drug. Also, after a single and repeated seven-day administration, these phages do not cause apoptosis and necrosis of immune competent cells in experimental animals. The results of the studies indicate the safety of the 3-component phage composition and can be used for the further development of new biological products based on cholera bacteriophages in the future. ","PeriodicalId":516710,"journal":{"name":"Problems of Particularly Dangerous Infections","volume":"13 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140510898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Socio-Demographic and Eco-Epidemiological Parameters of Tick-Borne Infections Morbidity in Baikal Region","authors":"O. V. Mel’nikova, N. A. Bykova, N. V. Ustinova, E. I. Andaev","doi":"10.21055/0370-1069-2023-4-106-114","DOIUrl":"https://doi.org/10.21055/0370-1069-2023-4-106-114","url":null,"abstract":"The aim of the work was to compare the main socio-demographic and eco-epidemiological parameters of tick-borne viral encephalitis, tick-borne borrelioses and tick-borne rickettsiosis.Materials and methods. The authors’ databases based on epidemiological investigation records were used for the study. All in all, 2974 cases (Irkutsk and the Irkutsk district) were analyzed during the periods of 1995–2022 for tick-borne viral encephalitis and tick-borne borrelioses, and 2001–2022 for tick-borne rickettsiosis.Results and discussion. The following parameters were assessed: the timing of epidemic season; the geography of prevalence; localization of tick bite on the human body; incubation time; gender and age structure of patients; social composition and exposure conditions. It was shown, that the parameters had their own features for each disease, and part of them are common to all Eurasian area of these infections. The shared characteristics include: the early epidemic season onset for tick-borne rickettsiosis; the shorter incubation time for tickborne rickettsiosis as compared to tick-borne viral encephalitis and tick-borne borrelioses; the increased frequency of tick-borne rickettsiosis vectors’ bites near the head and neck, and tick-borne borrelioses vectors – on the torso; large percentage of older persons among patients with tick-borne borrelioses and children under 14 years of age among patients with tick-borne rickettsiosis; prevalence of male population over female one as regards all surveyed pathogens. Low incidence of tick-borne diseases among professional contingent (the work associated with staying in natural foci of infection), an increased risk of tick-borne encephalitis and rickettsiosis among social group “unemployed”, and tick-borne borrelioses – among retirees, can be attributed to regional specificity.","PeriodicalId":516710,"journal":{"name":"Problems of Particularly Dangerous Infections","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140510534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}