The results of the detection of specific IgG antibodies to Ebola virus (Filoviridae: Orthoebolavirus) in residents of the Republic of Guinea after the end of the epidemic
- Authors: Naidenova E.V.1, Kartashov M.Y.2, Shulgina I.S.2, Pyankov S.A.2, Kulagin M.A.1, Bah M.B.3, Nourdine I.4, N’Fally M.4, Konomou V.5, Traore M.S.3, Boumbaly S.4, Kutyrev V.V.1
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Affiliations:
- Russian Research Anti-Plague Institute «Microbe» of the Federal Service for Surveillance of Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor)
- State Scientific Center of Virology and Biotechnology «Vector» of the Federal Service for Surveillance of Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor)
- Research Institute of Applied Biology of Guinea
- Virological Research Center, Laboratory of Viral Hemorrhagic Fevers of Guinea
- Scientific Clinical and Diagnostic Center of Epidemiology and Microbiology
- Issue: Vol 70, No 2 (2025)
- Pages: 154-163
- Section: ORIGINAL RESEARCH
- URL: https://ogarev-online.ru/0507-4088/article/view/310654
- DOI: https://doi.org/10.36233/0507-4088-288
- EDN: https://elibrary.ru/ukfplk
- ID: 310654
Cite item
Abstract
Introduction. In 2014–2016, an epidemic of Ebola virus disease (EVD) was registered in Guinea. In 2021, EVD cases were repeated in the region. The importance of studying the duration of post-infection immunity to the Ebola virus in the body of convalescents is due to the fact that after the end of the epidemic they can be the main sources of infection. One of the indicators of the pathogen circulation in a certain area is the detection of specific IgG antibodies in the blood sera of the inhabitants.
The aim of the study is to identify IgG immunoglobulins to Ebola virus in the blood sera of reconvalescents and practically healthy residents of the Republic of Guinea after the end of the epidemic.
Materials and methods. The ELISA method was used to test the blood sera of 9 patients treated at the NKDCEM hospital (Kindia), collected after the end of the disease and up to 72 months after recovery, and 3939 blood serum samples from practically healthy residents of Guinea.
Results. IgG antibodies in the blood sera of reconvalescents a month after recovery were detected in a titer of up to 1 : 800. By 12 months, the antibody level decreased to 1 : 100 and remained at this level for up to 48 months. After 6 years of observation, no antibodies were registered. Among the 3939 blood samples from healthy residents, IgG immunoglobulins to the Ebola virus were detected in 5.6%. Most of the positive samples were collected in Forest Guinea (7.7%), and a smaller part in Upper Guinea (4.5%). The maximum percentage of positive samples was detected in people over 70 years of age (12.3%).
Conclusion. In our case, it was shown that a high level of post-infection immunity in the blood sera of patients with EVD persists for the first 6 months, this corresponds to the data obtained by other authors, and does not exclude the possibility of re-infection. The highest level of the seroprevalence is registered in Forest Guinea. This indicates the active circulation of the pathogen and the constant contact of the inhabitants of the region with it, which leads to epidemiological complications.
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##article.viewOnOriginalSite##About the authors
Ekaterina V. Naidenova
Russian Research Anti-Plague Institute «Microbe» of the Federal Service for Surveillance of Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor)
Author for correspondence.
Email: katim2003@mail.ru
ORCID iD: 0000-0001-6474-3696
PhD (Biology), Leading Researcher at the Department of Diagnostics of Infectious Diseases
Russian Federation, 410005, SaratovMikhail Yu. Kartashov
State Scientific Center of Virology and Biotechnology «Vector» of the Federal Service for Surveillance of Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor)
Email: Mikkartash@yandex.ru
ORCID iD: 0000-0002-7857-6822
PhD (Biology), Senior Researcher at the Department of Flavivirus Infections
Russian Federation, 630559, Novosibirsk Region, Kol’tsovoIrina S. Shulgina
State Scientific Center of Virology and Biotechnology «Vector» of the Federal Service for Surveillance of Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor)
Email: Shuigina.is@vector.ru
ORCID iD: 0000-0002-6850-338X
Junior Researcher at the Collection of Microorganisms Department
Russian Federation, 630559, Novosibirsk Region, Kol’tsovoStepan A. Pyankov
State Scientific Center of Virology and Biotechnology «Vector» of the Federal Service for Surveillance of Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor)
Email: pyanstep@gmail.ru
ORCID iD: 0000-0002-6593-6614
Senior Researcher at the Collection of Microorganisms Department
Russian Federation, 630559, Novosibirsk Region, Kol’tsovoMaxim A. Kulagin
Russian Research Anti-Plague Institute «Microbe» of the Federal Service for Surveillance of Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor)
Email: rusrapi@mail.ru
ORCID iD: 0000-0002-6423-1460
Junior Researcher at the Department of Diagnostics of Infectious Diseases
Russian Federation, 410005, SaratovMamadou B. Bah
Research Institute of Applied Biology of Guinea
Email: boundoukhourabah@gmail.ru
ORCID iD: 0000-0002-4565-269X
Researcher
Guinea, KindiaIbrahim Nourdine
Virological Research Center, Laboratory of Viral Hemorrhagic Fevers of Guinea
Email: Ibrahimndin@yahoo.fr
ORCID iD: 0000-0002-2970-9676
PhD (Biology), Researcher, Director
Guinea, ConakryMagassouba N’Fally
Virological Research Center, Laboratory of Viral Hemorrhagic Fevers of Guinea
Email: cmagassouba01@gmail.com
ORCID iD: 0000-0002-3760-6642
PhD (Biology), Scientific Consultant
Guinea, ConakryViktor Konomou
Scientific Clinical and Diagnostic Center of Epidemiology and Microbiology
Email: Saet-64@yandex.ru
ORCID iD: 0009-0007-5010-0041
Chief Physician of the Hospital
Guinea, KindiaMohamed S. Traore
Research Institute of Applied Biology of Guinea
Email: dg@irbag.edu.gn
ORCID iD: 0000-0002-3811-8675
PhD (Biology), Director General
Guinea, KindiaSanaba Boumbaly
Virological Research Center, Laboratory of Viral Hemorrhagic Fevers of Guinea
Email: drboumbaly@yahoo.fr
ORCID iD: 0000-0002-4506-6033
PhD (Biology), Director
Guinea, ConakryVladimir V. Kutyrev
Russian Research Anti-Plague Institute «Microbe» of the Federal Service for Surveillance of Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor)
Email: rusrapi@mail.ru
ORCID iD: 0000-0003-3788-3452
Dr Sci (Medicine), Academician of the Russian Academy of Sciences, Professor, Director
Russian Federation, 410005, SaratovReferences
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