Serological diagnosis and prevalence of HIV-1 infection in Russian metropolitan areas
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01.12.2021 |
Kireev D.E.
Chulanov V.P.
Shipulin G.A.
Semenov A.V.
Tivanova E.V.
Kolyasnikova N.M.
Zueva E.B.
Pokrovskiy V.V.
Galli C.
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BMC Infectious Diseases |
10.1186/s12879-020-05695-z |
0 |
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© 2021, The Author(s). Background: HIV infection is a major health problem in Russia. We aimed to assess HIV prevalence in different population groups and to compare the characteristics of 4th generation immunoassays from Abbott, Bio-Rad, Vector-Best, Diagnostic Systems, and Medical Biological Unit. Methods: The study included 4452 individuals from the general population (GP), 391 subjects at high risk of HIV infection (HR) and 699 with potentially interfering conditions. HIV positivity was confirmed by immunoblot and by HIV RNA, seroconversion and virus diversity panels were also used. HIV avidity was employed to assess recent infections. Results: The prevalence in GP was 0.40%, higher in males (0.62%) and in people aged < 40 years (0.58%). Patients attending dermo-venereal centers and drug users had a high prevalence (34.1 and 58.8%). Recent infections were diagnosed in 20% of GP and in 4.2% of HR. Assay sensitivity was 100% except for one false negative (99,54%, MBU). Specificity was 99.58–99.89% overall, but as low as 93.26% on HR (Vector-Best). Small differences on early seroconversion were recorded. Only the Abbott assay detected all samples on the viral diversity panel. Conclusion: HIV infection rate in the high-risk groups suggests that awareness and screening campaigns should be enhanced. Fourth generation assays are adequate but performance differences must be considered.
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Using statistical phylogenetics for investigation of enterovirus 71 genotype a reintroduction into circulation
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25.09.2019 |
Vakulenko Y.
Deviatkin A.
Lukashev A.
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Viruses |
10.3390/v11100895 |
0 |
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© 2019 by the authors. Licensee MDPI, Basel, Switzerland. Neurovirulent enterovirus 71 (EV-A71) caused a massive epidemic in China in 2008-2011. While subgenotype C4 was the major causative agent, a few isolates were almost identical to the prototype EV-A71 strain and belonged to genotype A. This variant was allegedly extinct since 1970, and its identification in this epidemic suggests reintroduction of the archive virus. Regression analysis of genetic distances (TempEst software) was of moderate utility due to the low resolution of classical phylogenetic methods. Bayesian phylogenetic analysis (BEAST software) suggested artificial introduction event based on highly aberrant phylogenetic tree branch rates that differed by over three standard deviations from the mean substitution rate for EV71. Manual nucleotide-level analysis was used to further explore the virus spread pattern after introduction into circulation. Upon reintroduction, the virus accumulated up to seven substitutions in VP1, most of them non-synonymous and located within the capsid's canyon or at its rims, compatible with readaptation of a lab strain to natural circulation.
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On the epidemiology of Plasmodium vivax malaria: Past and present with special reference to the former USSR
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04.10.2018 |
Kondrashin A.
Morozova L.
Stepanova E.
Turbabina N.
Maksimova M.
Morozov E.
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Malaria Journal |
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3 |
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© 2018 The Author(s). Presently, many malaria-endemic countries in the world are transitioning towards malaria elimination. Out of the 105 countries with ongoing malaria transmission, 10 countries are classified as being in the pre-elimination phase of malaria control, and 9 countries are in the malaria elimination stage, whereas 7 countries are classified as being in the prevention of introduction phase. Between 2000 and 2015, 17 countries eliminated malaria (i.e., attained zero indigenous cases for 3 years or more). Seven countries were certified by the WHO as having successfully eliminated malaria. The purpose of this review was to analyse the epidemiological characteristics of vivax malaria during the various stages of malaria eradication (elimination) programmes in different countries in the past and present. Experiences of the republics of the former USSR with malaria are interesting, particularly since the data overwhelmingly were published in Russian and might not be known to western readers. Among the most important characteristics of Plasmodium vivax epidemiology at present are changes in the ratio of the short-incubation P. vivax to long-incubation P. vivax, the incidence of severe P. vivax cases, the increased numbers of asymptomatic P. vivax cases, the reduced response to anti-malarials and a few others. Various factors contributing towards the peculiarities of P. vivax epidemiology are discussed.
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Acute and Chronic Musculoskeletal Injury in Para Sport: A Critical Review
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01.05.2018 |
Tuakli-Wosornu Y.
Mashkovskiy E.
Ottesen T.
Gentry M.
Jensen D.
Webborn N.
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Physical Medicine and Rehabilitation Clinics of North America |
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2 |
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© 2018 Elsevier Inc. Sport-related injury patterns among Para athletes have been described with increasing frequency. This review summarizes musculoskeletal injuries in Para athletes. Seated Para athletes sustain upper extremity injuries more commonly; ambulant Para athletes frequently sustain lower extremity injuries. The upper extremity is the most commonly injured anatomic area in all Para athletes, unlike able-bodied athletes. Advanced age and spinal cord injury may increase the risk of upper extremity injury. Injury data for recreational and youth Para athletes are sparse. Summarizing current injury epidemiology data may help to accelerate the development of injury prevention strategies and lifetime injury models for Para athletes.
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The frequency and species composition of vaginal bacterial carriage in the third trimester of gestation
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01.01.2018 |
Naumenko N.
Мorozova О.
Kuksyuk P.
Lyakhova О.
Aleksandrov L.
Аstsaturova О.
Belova А.
Nikonov A.
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Voprosy Ginekologii, Akusherstva i Perinatologii |
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0 |
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© 2018, Dynasty Publishing House. All rights reserved. The objective. To specify the frequency and species composition of vaginal bacterial carriage in pregnant women at the term of gestation 35–37 wks. Patients and methods. We examined 800 pregnant women, who were followed-up on an outpatient basis at terms of gestation 35–37 wks. Cultural examination of the content of the posterior vaginal fornix was performed. Species identification of microorganisms was performed by the method of direct protein profiling with the help of MALDI-TOF mass spectrometry, FLEX series, Bruker Daltonic GmbH, Germany. Results. The growth of flora was obtained in 761 patients (95%). Bacterial vaginosis (n = 71), Candida vulvovaginitis (n = 83) were diagnosed in 154 patients (19%). Lactobacillus spp. were found in 80% (n = 637) of examined women, of them in 161 (20%) in monoculture. Bacterial carriage was diagnosed in 55.8% of cases. The prevalence of Enterococcus faecalis, Escherichia coli, Streptococcus agalactiae, Staphylococcus epidermidis and Staphylococcus haemoliticus was noted. They were much more rarely detected in monoculture: E. faecalis (1%), S. agalactiae (0.1%), S. epidermidis (0.1%), Candida albicans (0.1%). In 39 (5%) patients, no growth of flora was found. In 17 patients we found extended-spectrum B-lactamase-producing bacteria: E. coli (n = 15), Klebsiella pneumoniae (n = 2). Conclusion. Taking into account a high prevalence of vaginal bacterial carriage in pregnant women in the 3rd trimester, it might be expedient to consider inclusion of microbiological examination of vaginal discharge in the basic spectrum of antenatal observation and screening examination of pregnant in the Russian Federation.
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Expediency and prospects of a vaccinal prevention of whooping cough without age restrictions
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01.01.2018 |
Mikheeva I.
Saltykova T.
Mikheeva M.
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Jurnal Infektologii |
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0 |
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2019 © Interregional public organization Association of infectious disease specialists of Saint-Petersburg and Leningrad region (IPO AIDSSPbR). All Rights Reserved. The goal of study was the epidemiological substantiation of optimization measures of a vaccinal prevention of whooping cough in the Russian Federation. Materials and methods. The retrospective descriptive epidemiological research has been conducted by analysis of the official statistical data on the whooping cough case rate (form No. 2) in 2005-2017 in the Russian Federation, as well as the data about preventive whooping cough inoculations (forms No. 5, No. 6) in 2005-2017 and about epidemic outbreakes in 2017 (form No. 23-17). The assessment of an economic damage from whooping cough in 2005-2017 has been carried out. Results. The following adverse characteristics of a modern epidemiological situation on whooping cough in Russia are shown: long-term recurrence of epidemic process, tendency of rising of a case rate of children of 0-2 years; high percentage of children of preschool and school age among whooping cough cases; prevalence among the patients with whooping cough of the children who have been vaccinated against this infection previously, epidemic outbreakes in children's collectives, the stability of a case rate of teenagers and adults with prevalence of the mild and the erased clinical forms of this infection. The risks due to weaknesses of the whooping cough vaccinal prevention are noted: the insufficient immunization coverage owing to falce contraindications and refusals of parents of vaccinations of children, noncompliance with terms and intervals between inoculations, lack of domestic vaccine for revaccination of children at the age of 5 years and older. Conclusion. It is necessary to introduce in the national vaccination schedule a preschool booster dose for children at the age of 6 and adolescents at 14 years with the combined reduced antigen content tetanus-diphtheria and acellular pertussis vaccines as well as the inoculations of this vaccine according to epidemiological indications to health workers, employees of educational institutions. A revaccination against whooping cough is recommended as “cocoon” for the persons contacting to not vaccinated child under 1 year of age.
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Hepatitis C and its outcomes in Russia: Analysis of incidence, prevalence and mortality rates before the start of the programme of infection elimination
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01.01.2018 |
Pimenov N.
Komarova S.
Karandashova I.
Tsapkova N.
Volchkova E.
Chulanov V.
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Infektsionnye Bolezni |
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2 |
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© 2018, Dynasty Publishing House. All rights reserved. The objective. To evaluate the incidence and prevalence of hepatitis C in Russia and estimate the impact of hepatitis C virus on liver cirrhosis, hepatocellular carcinoma and liver-related mortality before the implementation of the national program for the elimination of viral hepatitis. Materials and methods. We analyzed statistical data on the incidence of hepatitis C in Russia in 2001–2017, the incidence, prevalence and mortality rates from liver cirrhosis and malignant liver tumors in 2011–2015. An analysis of the incidence and prevalence of HCV was carried out in various age-sex groups. The structure of genotypes of the hepatitis C virus was determined in patients at different stages of liver fibrosis and with different levels of viral load. Results. In 2017, 50 798 cases of HCV were registered in Russia (34.6 per 100 thousand of the population). As of January 1, 2017, the total number of patients with chronic hepatitis C under medical observation was 591 830 (405 per 100 thousand population). The incidence rate of fibrosis and cirrhosis in Russia in 2015 was 12.7 per 100000 population (18640 cases), the total number of registered patients – 75.9 per 100 thousand population (110951 people). The incidence rate of malignant liver tumors in 2015 was 5.5 per 100 thousand population (8083 cases), the total number of patients on dispensary observation was 5.0 per 100 thousand population (7360 people). In 2015, the estimated number of deaths from liver cirrhosis and hepatocellular carcinoma in the outcome of chronic hepatitis C was 14 792 and 1635, respectively. Conclusion. Hepatitis C is the main cause of liver cirrhosis (excluding alcoholic etiology), hepatocellular carcinoma and liver-related mortality in Russia. To reduce the prevalence of HCV and mortality from liver cirrhosis and primary liver cancer, it is necessary to provide all patients with HCV with antiviral drugs.
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Cranial dystonia
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01.01.2018 |
Tolmacheva V.
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Nevrologiya, Neiropsikhiatriya, Psikhosomatika |
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0 |
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© 2018 Ima-Press Publishing House. All rights reserved. Cranial dystonia is a common disease of the extrapyramidal nervous system. The clinical manifestations of dystonia are extremely variable; many of its forms are often undiagnosed. Dystonia is a sensorimotor disorder of the nervous system. Damage affects not only one structure, but also a network of the nodes interacting with each other in the somatosensory cortex and associative sensory and motor fields, which play a role in the integration of various sensory modalities coming from both outside the body and from the receptors within it. Botulinum toxin preparations show the highest efficacy in treating cranial dystonia. If their administration cannot achieve a positive result, oral drugs and surgical treatments should be used.
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Set-up of the electronic database of pediatric cancer patients in pilot medical facilities: A prospective cohort study
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01.01.2018 |
Rykov M.
Turabov I.
Zheludkova O.
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Onkopediatria |
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7 |
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© 2018 Paediatrician Publishers, LLC. All rights reserved. At present, there is no reliable statistical data (morbidity, mortality, one-year mortality, etc.) that characterize the state of medical care for children with cancers in the Russian Federation seen in due to the lack of an universal electronic database of patients. Objective. Improve the reliability of statistical data. Methods. In the clinical practice of two pilot medical facilities, an electronic database of pediatric cancer patients was introduced which allows: keep patient records with a diagnosis, key dates, follow-up data; analyze the treatment received earlier and assess its quality; make a treatment plan; obtain information on the availability of beds and the number of patients in various medical facilities; perform medical consultations involving the of specialists of the third level medical institutions. Patient (or legal representatives of the patient), has access to the «private cabinet » which provides information on the treatment plan including a schedule for taking medicines, as well as routing possibilities. Results. In the period of 6 months (09.17-02.18), information on 75 patients who received treatment from 2017 to the present was put into the electronic database. Conclusion. The electronic database provides reliable statistical data, helps monitoring the quality of medical care and routing patients. This results in reducing the budget costs and improving the survival of patients.
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Current possibilities and potential development of molecular enterovirus surveillance. Experience of Russian Federation
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01.01.2018 |
Lukashev A.
Golitsina L.
Vakulenko Y.
Akhmadishina L.
Romanenkova N.
Sapega E.
Morozova N.
Novikova N.
Trotsenko O.
Ivanova O.
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Russian Journal of Infection and Immunity |
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0 |
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© 2018 Saint Petersburg Pasteur Institute.All Rights Reserved. Enteroviruses are small RNA viruses, which are ubiquitous and commonly cause outbreaks with various clinical manifestations. In 2006, the Program on enterovirus surveillance was approved in the Russian Federation. Over the last years, molecular-biological and bioinformatics methods for enterovirus epidemiology studies have been developed both in Russia and worldwide. Currently, identification of enteroviruses is carried out by analyzing nucleotide sequence of the full-length VP1 genome region (ca. 900 nt). Routinely, it is sufficient to obtain a partial VP1 genome region sequence (ca. 300 bp) for enteroviruse verification in most cases; however, a more stringent type criterion of 80% sequence identity should be used compared to the 75% sequence identity cut-off for the complete VP1 genome region. Further sequence analysis may be performed by using Bayesian phylogenetic methods, which allow using molecular clock to trace outbreak emergence. Enteroviruses accumulate about 0.5–1% nucleotide substitutions per year. Therefore, a short genome fragment may be used to analyze virus phylodynamics at the level of international transfers and circulating virus variants. On a shorter timescale, a full-length VP1 genome region or a complete genome sequence are preferred for investigating molecular epidemiology, because a short sequence allows to reliably distinguish not more than 1–2 transmission events per year. Thus, determining enterovirus sequences for full-length VP1 genome region or full-genome sequence is preferred for examining viral outbreaks. It is increasingly apparent that analyzing available enterovirus nucleotide sequences reveals limitations related to uneven surveillance efficacy in various countries and short length of genome fragment measured in routine control. As a result, a proper global-scale analysis of enterovirus molecular epidemiology remains problematic. Over the last 20 years, the number of available enterovirus nucleotide sequences increased by hundred times, but understanding emergence of enterovirus infection outbreaks remains limited. Further development of enterovirus surveillance would require new methods for sewage monitoring, affordable high-throughput sequencing and harmonization of global surveillance systems.
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