The genetic history of admixture across inner Eurasia

This is the author accepted manuscript. The final version is available from Nature Research via the DOI in this record.Data Availability. Genome-wide sequence data of two Botai individuals (BAM format) are available at the European Nucleotide Archive under the accession number PRJEB31152 (ERP113669). Eigenstrat format array genotype data of 763 present-day individuals and 1240K pulldown genotype data of two ancient Botai individuals are available at the Edmond data repository of the Max Planck Society (https://edmond.mpdl.mpg.de/imeji/collection/Aoh9c69DscnxSNjm?q=).The indigenous populations of inner Eurasia, a huge geographic region covering the central Eurasian steppe and the northern Eurasian taiga and tundra, harbor tremendous diversity in their genes, cultures and languages. In this study, we report novel genome-wide data for 763 individuals from Armenia, Georgia, Kazakhstan, Moldova, Mongolia, Russia, Tajikistan, Ukraine, and Uzbekistan. We furthermore report additional damage-reduced genome-wide data of two previously published individuals from the Eneolithic Botai culture in Kazakhstan (~5,400 BP). We find that present-day inner Eurasian populations are structured into three distinct admixture clines stretching between various western and eastern Eurasian ancestries, mirroring geography. The Botai and more recent ancient genomes from Siberia show a decrease in contribution from so-called “ancient North Eurasian” ancestry over time, detectable only in the northern-most “forest-tundra” cline. The intermediate “steppe-forest” cline descends from the Late Bronze Age steppe ancestries, while the “southern steppe” cline further to the South shows a strong West/South Asian influence. Ancient genomes suggest a northward spread of the southern steppe cline in Central Asia during the first millennium BC. Finally, the genetic structure of Caucasus populations highlights a role of the Caucasus Mountains as a barrier to gene flow and suggests a post-Neolithic gene flow into North Caucasus populations from the steppe.Max Planck SocietyEuropean Research Council (ERC)Russian Foundation for Basic Research (RFBR)Russian Scientific FundNational Science FoundationU.S. National Institutes of HealthAllen Discovery CenterUniversity of OstravaCzech Ministry of EducationXiamen UniversityFundamental Research Funds for the Central UniversitiesMES R

Antibiotic therapy for acute respiratory viral infections in children:what do parents know about antibiotics and antibiotic resistance?

One of the causes of antibiotic resistance (AR) is irrational use of antibiotics (ABs) that are commonly administered to patients with acute respiratory viral infections (ARVIs). Rational AB use largely depends on the awareness of people. Objective. To analyze the awareness of people about AR and AB use, as well as to assess the attitude to AB therapy among parents of preschool children. Materials and methods. We conducted anonymous survey among 513 parents of preschool children in Tomsk. Results. Almost two-thirds (61.6%) of respondents admitted that their children received AB during cold/flu/ARVI. The most commonly used ABs were amoxicillin (62.3%), azithromycin (19.7%), and amoxicillin with clavulanic acid (11.1%). The majority of patients administered ABs to their children only after doctor's prescription (80.4%) and adhered to treatment regimen (79.7%). A total of 65.8% respondents stated that doctors had explained why AB therapy was necessary. Nearly two out of three parents (62.4%) believed that ABs may have a negative impact on health. More than half of the respondents were aware of AR. Conclusion. The majority of parents use antibiotics to treat ARVI in their children only with doctor's prescription. However, we observed insufficient awareness about AR, AB use, and possible side effects, which necessitates the development of educational programs for the population

The Use of Antibacterial Drugs and Awareness About the Antibiotic Resistance Problem Among the Students of a Medical University

Background. The growth of antibiotic resistance is an urgent problem of modern medicine associated with the irrational use of antibacterial drugs. The solution to this problem requires a comprehensive analysis of the situation not only from the patients' standpoint, but also from that of medical specialists. Aim. To establish the level of awareness about the problem of antibiotic resistance and to study the practice of antibacterial drug use among senior students of a medical university. Material and methods. A one-time sociological study was conducted in the format of an online survey of the 5th-6th yearstudents of the medical and pediatric faculties of the Siberian State Medical University of the Ministry of Health of the Russian Federation. Results. An invitation to the survey was sent to 406 5th-6th year students of the pediatric and medical faculties; 334 students voluntarily completed the questionnaire (return rate - 82.3%). Most students are aware of the problem of antibiotic resistance. 58.8% of the students took drugs as prescribed by a doctor, adhering to the prescribed duration of treatment. The most commonly used antibiotics were: amoxicillin/clavulanic acid - 57.6%, amoxicillin - 29%, azithromycin - 19.4%, ciprofloxacin - 13.4%, 3rd generation cephalosporins - 8.1%. It was found that 45.4% of students used antibiotics parenterally, of which half (50.4%) performed injections at home or in the dormitory. Up to 89.2% of respondents consider it necessary to use medications to restore the intestinal microflora against the background of antibiotic therapy. Conclusions. Despite the high awareness of the problem of antibiotic resistance and adherence to medical recommendations regarding the use of antibiotics, it is necessary to increase the competence in the field of rational antibiotic therapy for both students and practitioners

Characterizing the genetic history of admixture across inner Eurasia

The indigenous populations of inner Eurasia, a huge geographic region covering the central Eurasian steppe and the northern Eurasian taiga and tundra, harbor tremendous diversity in their genes, cultures and languages. In this study, we report novel genome-wide data for 763 individuals from Armenia, Georgia, Kazakhstan, Moldova, Mongolia, Russia, Tajikistan, Ukraine, and Uzbekistan. We furthermore report genome-wide data of two Eneolithic individuals (~5,400 years before present) associated with the Botai culture in northern Kazakhstan. We find that inner Eurasian populations are structured into three distinct admixture clines stretching between various western and eastern Eurasian ancestries. This genetic separation is well mirrored by geography. The ancient Botai genomes suggest yet another layer of admixture in inner Eurasia that involves Mesolithic hunter-gatherers in Europe, the Upper Paleolithic southern Siberians and East Asians. Admixture modeling of ancient and modern populations suggests an overwriting of this ancient structure in the Altai-Sayan region by migrations of western steppe herders, but partial retaining of this ancient North Eurasian-related cline further to the North. Finally, the genetic structure of Caucasus populations highlights a role of the Caucasus Mountains as a barrier to gene flow and suggests a post-Neolithic gene flow into North Caucasus populations from the steppe