Molecular Epidemiology of Pathogenic Hantaviruses in the Far East of Russia, 2015-2018

Human pathogenic hantaviruses, belonging to the family Hantaviridae, genus Orthohantavirus, are disseminated worldwide and cause hemorrhagic fever with renal syndrome (HFRS) in Europe and Asia. In the Far East of Russia Hantaan (HTNV), Amur (AMRV) and Seoul (SEOV) viruses are etiologic agent of HFRS, while the human pathogenic potential of other seven hantaviruses, circulating in this region, has not been researched adequately yet. Objective of the study was genetic identification of hantaviruses, associated with HFRS in the Far East of Russia during 2015-2018. Materials and methods. Blood samples of 64 HFRS patients from Jewish Autonomous Region, Khabarovsk and Primorsky Territories were analyzed for hantavirus RNA using reverse transcription polymerase chain reaction. Results and discussion. A total of 19 viral RNA isolates from HFRS patients were genetically typed. Etiologic agents of HFRS were three pathogenic hantaviruses: HTNV (13 isolates), AMRV (3 isolates), SEOV (3 isolates). Three genetic lineages were identified among HTNV, two lineages among AMRV One genetic variant of SEOV virus was identified among HFRS patients, which was more close to the strains from South-Eastern Asia than to those from the neighboring countries

THE RESULTS OF STUDYING OF THE MATERIAL FROM THE PATIENTS WITH SUSPECTED SEVERE ACUTE RESPIRATORY SYNDROME IN THE FAR EAST OF RUSSIA

During April-July, 2003 39 specimens of clinical material from six patients and three dead men with suspected «atypical pneumonia» who were detected on the territory of Khabarovsk, Primorski and Sakhalin regions were investigated. The inoculation of clinical material to cell culture Vero E6 did not show the cytopathogenic effect for coronavirus SARS. The amplificate with sought for molecular weight was obtained in RT-PCR assay with primers SAR1 and BNI in sputum and blood specimens of one of the patients, but it was not cDNA of coronavirus SARS. As a result of additional studies there were established the following diagnosis: HFRS, bronchopneumonia with Clebsiella etiology (postmortem) and leptospirosis (postmortem). The terminal diagnosis for the rest patients were: bronchopneumonia of inferior lobes (3), maxillary sinusitis, ARVI and toxocariasis

Analysis of Epidemiological Situation on Hemorrhagic Fever with Renal Syndrome in the Khabarovsk Territory and the Jewish Autonomous Region, and Prognosis of Its Development for the Past-Flood Period in 2013-2014

Complex analysis of the data concerning epidemiological situation on HFRS in the Khabarovsk Territory and the Jewish Autonomous Region for the past decade (2003-2012) previous to high water in 2013 and results of operative epidemiological inspection of the flooding area and the adjoining territory where a high index of laboratory evidences of the virus presence in the main carriers was revealed, outlines high probability of the epidemiological condition complications in view of the infection in the post-flooding period in 2013-2014 in the both entities. Therewith on the basis of the unfavorable prognosis for the epidemiological situation development a Plan of organizational, preventive and anti-epidemic measures directed to minimization of risks related to aggravation of epidemiological situation on hemorrhagic fever with renal syndrome has been developed and is being implemented