Publications by authors named "N D Oorzhak"

Article Synopsis
  • * In areas without universal mass vaccination (UMV), seroprevalence has shifted to older age groups, while regions with child vaccination programs saw significant increases in HERD immunity among younger populations.
  • * The findings indicate a need for national implementation of UMV, along with strategies to improve vaccination coverage and conduct catch-up campaigns to sustain the effectiveness of existing programs.
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Members of the Lipopteninae subfamily are blood-sucking ectoparasites of mammals. The sheep ked () is a widely distributed ectoparasite of sheep. It can be found in most sheep-rearing areas and can cause skin irritation, restlessness, anemia, weight loss and skin injuries.

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The genus includes related, unclassified segmented flavi-like viruses, two segments of which have homology with flavivirus RNA-dependent RNA polymerase NS5 and RNA helicase-protease NS3. This group includes such viruses as Jingmen tick virus, Alongshan virus, Yanggou tick virus and others. We detected the Yanggou tick virus in and ticks in two neighbouring regions of Russia.

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Since August 2012, universal single-dose vaccination in children aged at least three years has been implemented in the Republic of Tuva, which was previously the region most affected by hepatitis A in Russia. The objective of this cross-sectional study was the assessment of the immunological and epidemiological effectiveness of vaccination program five years following its implementation. In the pre-vaccination period, anti-HAV antibody detection rates in Tuva was 66.

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Phlebovirus is an abundant and rather heterogeneous genus within the Phenuiviridae family (order Bunyavirales). The genus Phlebovirus is divided into two antigenic complexes, which also correspond to the main vector: sandflies/mosquitoes and ticks. Previously, only sandfly/mosquito-borne phleboviruses were associated with human disease, such as Rift Valley fever virus, Toscana virus, Sicilian and Naples Sandfly fever viruses and others.

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