Olena Vasylieva

ORCID: 0000-0003-4470-8740
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About
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Research Areas
  • Long-Term Effects of COVID-19
  • Medical and Biological Sciences
  • Historical Medical Research and Treatments
  • Human Health and Disease
  • Respiratory viral infections research
  • COVID-19 Clinical Research Studies
  • Thermal Regulation in Medicine
  • Child Nutrition and Water Access
  • Immune responses and vaccinations
  • Health and Medical Studies
  • Muscle and Compartmental Disorders
  • Trace Elements in Health
  • Neonatal and fetal brain pathology
  • Tuberculosis Research and Epidemiology
  • Pneumonia and Respiratory Infections
  • Immune Response and Inflammation
  • Diabetes and associated disorders
  • SARS-CoV-2 and COVID-19 Research
  • Anesthesia and Neurotoxicity Research
  • Lung Cancer Research Studies
  • Digestive system and related health
  • Advanced Technologies in Various Fields
  • Thyroid Disorders and Treatments
  • Pneumocystis jirovecii pneumonia detection and treatment
  • Viral gastroenteritis research and epidemiology

Sumy State University
2018-2024

Privolzhsky Research Medical University
2006

The incidence of cancer increases with age. Immunosenescence, characterized by a decline in adaptive immunity and chronic low-grade inflammation, may influence the efficacy immune checkpoint inhibitors (ICIs) elderly patients. Background/Objectives: While some studies suggest comparable ICIs across age groups, others report reduced response due to system dysregulation. This study aimed assess prognostic value ICI therapy for metastatic non-small cell lung (mNSCLC). Methods: A retrospective,...

10.20944/preprints202502.1607.v1 preprint EN 2025-02-20

Abstract. The aim of the review is to identify and summarize main theories Long COVID, pathogenesis clinical signs. Materials Methods. 110 articles from PubMed, Scopus, Google Scholar, as well WHO data statistics on prevalence COVID for period 2022-2025, which contain relevant information this syndrome, were processed. Special attention paid lesions nervous system psycho-emotional sphere. Conclusions. 1. More than 65 million people are affected by COVID. High susceptibility observed in...

10.31640/ls-2025-1-03 article EN Likarska sprava 2025-03-31

Introduction. Neonatal encephalopathy (NE) is one of the most common diseases newborn period; worldwide incidence NE more than 1 million newborns, which are registered in developing countries. Inflammation and hypoxia-ischemia play a vital, key role neonatal encephalopathy. A persistent inflammatory response neonates with observed during first week life, correlates severity brain damage, but can persist for weeks, months even years, due to tertiary mechanisms damage that include inflammation...

10.21272/eumj.2024;12(1):50-60 article EN cc-by Eastern Ukrainian Medical Journal 2024-01-01

Introduction: Diabetes mellitus and COVID-19 are nosologies that pose new challenges in the field of medicine, after their combination, have already outlined importance potentially large impact on health people around world. Each these pathologies individually has a significant lives well-being patients, together they create complex conditions for medical practice healthcare organization. The study mutual influence diabetes clinical picture, features course, diagnosis treatment patients is...

10.21272/eumj.2024;12(3):660-669 article EN cc-by Eastern Ukrainian Medical Journal 2024-01-01

Introduction: Rotavirus infection is a leading place in the structure of acute intestinal infections children. excreted 40–60 % children hospitalized with gastroenteritis all over world. Every year, 2 million patients are severe form RVI, 25 need medical help from doctor and 111 cases treated at home. The aim: purpose our study was to optimize treatment rotavirus by using Bacillus clausii. Materials methods: There were 65 under supervision. control group consisted 28 practically healthy...

10.36740/wlek201907117 article EN Wiadomości Lekarskie 2019-01-01

Introduction. The post-acute course in children 22% of cases may have signs nervous system damage. Common symptoms are headache, cognitive problems, anosmia, seizures, Guillain-Barré syndrome, demyelinating syndrome and autoimmune encephalitis, acute disseminated encephalomyelitis, posterior reversible encephalopathy viral gait difficulties. study aims to describe a rare clinical case post-COVID with lesions. Materials methods. A 9-year-old girl myelopathy, lower spastic paraparesis, who was...

10.21272/eumj.2024;12(3):730-735 article EN cc-by Eastern Ukrainian Medical Journal 2024-01-01

It has been proven that a deficiency of zinc, can significantly weaken the body's immune response to infection. Zinc plays key role in many immunological processes, such as proliferation and differentiation lymphocytes, antibody synthesis, phagocytosis. Aim: assess dynamics zinc levels pediatric patients with community-acquired pneumonia, taking into account presence or absence SARS-CoV-2 co-infection acute phase disease recovery period. Materials methods. The study included 114 children...

10.15574/sp.2024.8(144).3033 article EN cc-by-nc Modern pediatrics Ukraine 2024-12-28

Introduction. Acute respiratory infections are the most common infectious diseases worldwide among children of different age groups. Materials and methods. 59 between ages 3 7 participated in study. The first group included 22 patients with an acute viral infection, second one consisted 23 associated adenoid vegetation, 14 apparently healthy were control group. Immunology research was conducted during period disease. Statistical processing received data done standard statistical software EZR...

10.25040/ntsh2021.02.17 article EN cc-by Proceedings of the Shevchenko Scientific Society Medical Sciences 2021-12-29

Objective. The objective of the study was to determine chances a decrease in CBC cells when using antibiotics newborns. Materials and methods. A total 46 newborn infants who were hospitalized with main diagnosis hypoxic ischemic encephalopathy examined. By gestational age, they belonged late-preterm term groups. newborns divided into 2 subgroups. Group 1 – group: 25 children received antibiotics; group control 21 did not receive antibiotics. subgroups: 1a, 16 antibiotic 1b, 9 Antibiotics...

10.21272/eumj.2021;9(4):325-331 article EN cc-by Eastern Ukrainian Medical Journal 2021-01-01

Pneumonia is a disease characterized by lung tissue inflammation and the development of respiratory failure. most common infectious cause childhood mortality, occurring every 43 seconds worldwide. Despite advancements in medicine use cutting-edge diagnostic, treatment, preventive technologies, incidence pneumonia remains relatively high, especially resource-poor countries, adversely affecting socio-economic life society. Objective: To summarize contemporary scientific perspectives on...

10.21272/eumj.2023;11(4):360-374 article EN cc-by Eastern Ukrainian Medical Journal 2023-01-01

On the basis of archival materials, first identified by authors, and published historical sources that have not yet come to attention historians science, this article reconstructs biography Johann Christian Weltzien (1767–1829), doctor medicine surgery. In 1785, became a court physician. 1799, in retinue Grand Duke Konstantin Pavlovich, he participated Italian Swiss military campaigns. After that, was assigned Сourt Pavlovich Russia stayed at his until 1810. He started charitable activities...

10.11590/abhps.2023.2.02 article EN cc-by-nc Acta Baltica Historiae et Philosophiae Scientiarum 2023-12-15

The problem of acute respiratory tract infections (including bronchitis) remains urgent in the whole world independent human age, especially when disease rates are considered. World Health Organization reports annually on 1.5 billion cases diseases. In Ukraine, rate is 3.6 times higher among children than adults (totally, it equal to 67,000 per 100,000 individuals). highest observed under-6-year-old children. contrast average bronchopulmonary Europe, same Ukrainian index slightly for last...

10.21272/eumj.2021;9(2):189-201 article EN cc-by Eastern Ukrainian Medical Journal 2021-01-01
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