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1. Phlebovirus sequences detected in ticks collected in Russia: Novel phleboviruses, distinguishing criteria and high tick specificity

Author

Klimentov, Alexander S., Belova, Oxana A., Kholodilov, Ivan S., Butenko, Alexander M., Bespyatova, Liubov A., Bugmyrin, Sergey V., Chernetsov, Nikita, Ivannikova, Anna Y., Kovalchuk, Irina V., Nafeev, Alexander A., Oorzhak, Natalia D., Pilikova, Olga M., Polienko, Alexandra E., Purmak, Kristina A., Romanenko, Evgeniya N., Romanova, Lidiya Iu., Saryglar, Anna A., Solomashchenko, Nataliya I., Shamsutdinov, Anton F., Vakalova, Elena V., Lukashev, Alexander N., Karganova, Galina G., and Gmyl, Anatoly P.

Published
2020
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2. Ixodid ticks and tick-borne encephalitis virus prevalence in the South Asian part of Russia (Republic of Tuva)

Author

Kholodilov, Ivan, Belova, Oxana, Burenkova, Ludmila, Korotkov, Yuri, Romanova, Lidiya, Morozova, Lola, Kudriavtsev, Vitalii, Gmyl, Larissa, Belyaletdinova, Ilmira, Chumakov, Alexander, Chumakova, Natalia, Dargyn, Oyumaa, Galatsevich, Nina, Gmyl, Anatoly, Mikhailov, Mikhail, Oorzhak, Natalia, Polienko, Alexandra, Saryglar, Anna, Volok, Viktor, Yakovlev, Alexander, and Karganova, Galina

Published
2019
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3. The Immunological and Epidemiological Effectiveness of Pediatric Single-Dose Vaccination against Hepatitis A 9 to 11 Years after Its Implementation in the Tyva Republic, the Russian Federation.

Author

Lopatukhina, Maria A., Kyuregyan, Karen K., Karlsen, Anastasia A., Asadi Mobarkhan, Fedor A., Potemkin, Ilya A., Kichatova, Vera S., Isaeva, Olga V., Ilchenko, Lyudmila Yu., Saryglar, Anna A., and Mikhailov, Mikhail I.

Subjects
VACCINATION of children, VACCINE effectiveness, HEPATITIS A vaccines, ENVIRONMENTAL sampling, VACCINATION
Abstract

Since 2012, universal single-dose HAV vaccination in children aged 3 years and older has been implemented in the Tyva Republic, a region of the Russian Federation. The aim of this prospective non-interventional observational single-center study was to determine the immunological and epidemiological effectiveness of single-dose vaccination against hepatitis A 9 to 11 years after its implementation. The anti-HAV IgG antibodies were determined in two independent cohorts of children who were vaccinated with a single dose of monovalent pediatric inactivated vaccine (HAVRIX® 720 EU) in Tyva in 2012 and recruited 9 years (Year 9 Cohort) and 11 years (Year 11 Cohort) after immunization. The seroprotection rates defined as anti-HAV antibody concentrations ≥10 mIU/mL reached 99.4% (95% CI: 98.2–99.9% [501/504]) in the Year 9 Cohort, but decreased significantly to 75.4% (95% CI: 73.0–77.6% [1006/1335]) in the Year 11 Cohort (p < 0.0001). The anti-HAV geometric mean concentrations decreased from 1446.3 mIU/mL (95% CI: 1347.1–1545.4 mIU/mL) in the Year 9 Cohort to 282.6 mIU/mL (95% CI: 203.8–360.8, p < 0.0001) in the Year 11 Cohort. The HAV vaccination program resulted in zero rates of hepatitis A incidence in the Tyva Republic since 2016. However, the limited monitoring of HAV RNA in sewage and environmental samples demonstrated the ongoing circulation of both the regional epidemic strain of HAV genotype IA and another genotype IA strain imported recently from other parts of the Russian Federation, probably due to subclinical infections in non-vaccinated children under 3 years of age. Taken together, these data indicate the effectiveness of the single-dose HAV vaccination strategy but suggest the need to expand the vaccination program to include children aged 12 months and older to achieve maximum effectiveness. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Post-Vaccination and Post-Infection Immunity to the Hepatitis B Virus and Circulation of Immune-Escape Variants in the Russian Federation 20 Years after the Start of Mass Vaccination

Author

Asadi Mobarkhan, Fedor A., primary, Manuylov, Victor A., additional, Karlsen, Anastasia A., additional, Kichatova, Vera S., additional, Potemkin, Ilya A., additional, Lopatukhina, Maria A., additional, Isaeva, Olga V., additional, Mullin, Eugeniy V., additional, Mazunina, Elena P., additional, Bykonia, Evgeniia N., additional, Kleymenov, Denis A., additional, Popova, Liubov I., additional, Gushchin, Vladimir A., additional, Tkachuk, Artem P., additional, Saryglar, Anna A., additional, Kravchenko, Irina E., additional, Sleptsova, Snezhana S., additional, Romanenko, Victor V., additional, Kuznetsova, Anna V., additional, Solonin, Sergey A., additional, Semenenko, Tatyana A., additional, Mikhailov, Mikhail I., additional, and Kyuregyan, Karen K., additional

Published
2023
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5. Silent HDV epidemics culminates in high levels of liver cirrhosis in endemic region despite 20 years of HBV vaccination

Author

Isaeva, Olga V., primary, Kyuregyan, Karen K., additional, Karlsen, Anastasia A., additional, Kuzmin, Oleg V., additional, Potemkin, Ilya A., additional, Kichatova, Vera S., additional, Asadi Mobarkhan, Fedor A., additional, Mullin, Eugeniy V., additional, Kozhanova, Tatyana V., additional, Manuylov, Victor A., additional, Pochtovyy, Andrey A., additional, Gushchin, Vladimir A., additional, Saryglar, Anna A., additional, Ilchenko, Lyudmila Yu., additional, and Mikhailov, Mikhail I., additional

Published
2022
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6. Dynamic Changes in Hepatitis A Immunity in Regions with Different Vaccination Strategies and Different Vaccination Coverage

Author

Kyuregyan, Karen K., primary, Lopatukhina, Maria A., additional, Asadi Mobarkhan, Fedor A., additional, Kichatova, Vera S., additional, Potemkin, Ilya A., additional, Isaeva, Olga V., additional, Karlsen, Anastasia A., additional, Malinnikova, Elena Yu., additional, Kaira, Alla N., additional, Kozhanova, Tatyana V., additional, Manuylov, Victor A., additional, Mazunina, Elena P., additional, Bykonia, Evgeniia N., additional, Kleymenov, Denis A., additional, Ignateva, Margarita E., additional, Trotsenko, Olga E., additional, Kuznetsova, Anna V., additional, Saryglar, Anna A., additional, Oorzhak, Natalia D., additional, Romanenko, Victor V., additional, and Mikhailov, Mikhail I., additional

Published
2022
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7. Silent HDV epidemics culminates in high levels of liver cirrhosis in endemic region despite 20 years of HBV vaccination.

Author

Isaeva, Olga V., Kyuregyan, Karen K., Karlsen, Anastasia A., Kuzmin, Oleg V., Potemkin, Ilya A., Kichatova, Vera S., Asadi Mobarkhan, Fedor A., Mullin, Eugeniy V., Kozhanova, Tatyana V., Manuylov, Victor A., Pochtovyy, Andrey A., Gushchin, Vladimir A., Saryglar, Anna A., Ilchenko, Lyudmila Yu., and Mikhailov, Mikhail I.

Subjects
HEPATITIS D virus, HEPATITIS B vaccines, CIRRHOSIS of the liver, HEPATITIS B virus, BAYESIAN analysis, MOSAIC viruses
Abstract

The hepatitis delta virus (HDV) is believed to be a vanishing infection in countries with successful hepatitis B virus (HBV) vaccination programs. We assessed the current status of HDV infection in Tuva, a region of the Russia that has been highly endemic for HBV. The proportion of HDV‐infected patients among HBsAg‐positive patients in the regional registry in 2020 was 32.7% (786/2401). An analysis of the medical records of 514 HDV patients demonstrated that 37.5% (193/514) had liver cirrhosis at the first doctor's visit, and 7.4% of patients lived in families where another family member had HDV. All HDV patients were infected with genotype HDV‐1, 94.5% had HBV genotype D, and 5.5% had genotype A. A serosurvey conducted among 1170 healthy volunteers showed that the average detection rate of HBsAg with anti‐HDV was 1.0% (95% CI: 0.57–1.81%). No anti‐HDV positive samples were detected in participants aged under 30 years. The HBsAg/anti‐HDV positivity rate peaked at 7.4% in patients aged 50–59 years, which was significantly higher than in a similar age cohort surveyed in 2008 (1.6%, p <.0001). A Bayesian analysis showed that HDV circulation in Tuva resulted from two waves of introduction, the first in the 1810s (95% HPD: 1741–1834) from Central Asia, and the second in the 1960s (95% HPD: 1953–1979) from Russia. HBV has a much longer history of circulation in Tuva with the MRCA for the predominant genotype HBV‐D dated to 972 (95% HPD: 535–1253) for subtype D1, 1274 (95% HPD: 936–1384) for D2, and 1173 (95% HPD: 1005–1618) for D3. A SkyGrid reconstruction of population dynamics showed an increase in the intensity of HDV spread in recent decades. This situation shows the need for HDV screening and prevention measures among people living with HBV. [ABSTRACT FROM AUTHOR]

Published
2023
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8. Possible Arbovirus Found in Virome of Melophagus ovinus

Author

Litov, Alexander G., primary, Belova, Oxana A., additional, Kholodilov, Ivan S., additional, Gadzhikurbanov, Magomed N., additional, Gmyl, Larissa V., additional, Oorzhak, Natalia D., additional, Saryglar, Anna A., additional, Ishmukhametov, Aydar A., additional, and Karganova, Galina G., additional

Published
2021
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9. Geographical and Tick-Dependent Distribution of Flavi-Like Alongshan and Yanggou Tick Viruses in Russia

Author

Kholodilov, Ivan S., primary, Belova, Oxana A., additional, Morozkin, Evgeny S., additional, Litov, Alexander G., additional, Ivannikova, Anna Y., additional, Makenov, Marat T., additional, Shchetinin, Alexey M., additional, Aibulatov, Sergey V., additional, Bazarova, Galina K., additional, Bell-Sakyi, Lesley, additional, Bespyatova, Liubov A., additional, Bugmyrin, Sergey V., additional, Chernetsov, Nikita, additional, Chernokhaeva, Liubov L., additional, Gmyl, Larissa V., additional, Khaisarova, Anna N., additional, Khalin, Alexei V., additional, Klimentov, Alexander S., additional, Kovalchuk, Irina V., additional, Luchinina, Svetlana V., additional, Medvedev, Sergey G., additional, Nafeev, Alexander A., additional, Oorzhak, Natalia D., additional, Panjukova, Elena V., additional, Polienko, Alexandra E., additional, Purmak, Kristina A., additional, Romanenko, Evgeniya N., additional, Rozhdestvenskiy, Evgeniy N., additional, Saryglar, Anna A., additional, Shamsutdinov, Anton F., additional, Solomashchenko, Nataliya I., additional, Trifonov, Vladimir A., additional, Volchev, Evgenii G., additional, Vovkotech, Pavel G., additional, Yakovlev, Alexander S., additional, Zhurenkova, Olga B., additional, Gushchin, Vladimir A., additional, Karan, Lyudmila S., additional, and Karganova, Galina G., additional

Published
2021
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10. Universal Single-Dose Vaccination against Hepatitis A in Children in a Region of High Endemicity

Author

Mikhailov, Mikhail I., primary, Lopatukhina, Maria A., additional, Asadi Mobarhan, Fedor A., additional, Ilchenko, Lyudmila Yu., additional, Kozhanova, Tatyana V., additional, Isaeva, Olga V., additional, Karlsen, Anastasiya A., additional, Potemkin, Ilya A., additional, Kichatova, Vera S., additional, Saryglar, Anna A., additional, Oorzhak, Natalia D., additional, and Kyuregyan, Karen K., additional

Published
2020
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