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https://www.readbyqxmd.com/read/29760190/tick-borne-encephalitis-virus-nonstructural-protein-ns5-induces-rantes-expression-dependent-on-the-rna-dependent-rna-polymerase-activity
#1
Zifeng Zheng, Jieyu Yang, Xuan Jiang, Yalan Liu, Xiaowei Zhang, Mei Li, Mudan Zhang, Ming Fu, Kai Hu, Hanzhong Wang, Min-Hua Luo, Peng Gong, Qinxue Hu
Tick-borne encephalitis virus (TBEV) is one of the flaviviruses that targets the CNS and causes encephalitis in humans. The mechanism of TBEV that causes CNS destruction remains unclear. It has been reported that RANTES-mediated migration of human blood monocytes and T lymphocytes is specifically induced in the brain of mice infected with TBEV, which causes ensuing neuroinflammation and may contribute to brain destruction. However, the viral components responsible for RANTES induction and the underlying mechanisms remain to be fully addressed...
May 14, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29745301/comparative-genome-analysis-of-alkhumra-hemorrhagic-fever-virus-with-kyasanur-forest-disease-and-tick-borne-encephalitis-viruses-by-the-in-silico-approach
#2
Navaneethan Palanisamy, Dario Akaberi, Johan Lennerstrand, Åke Lundkvist
Alkhumra hemorrhagic fever virus (AHFV), a relatively new member of the Flaviviruses, was discovered in Saudi Arabia 23 years ago. AHFV is classified in the tick-borne encephalitis virus serocomplex, along with the Kyasanur forest disease virus (KFDV) and tick-borne encephalitis virus (TBEV). Currently, very little is known about the pathologies of AHFV. In this study, using the available genome information of AHFV, KFDV and TBEV, we have predicted and compared the following aspects of these viruses: evolution, nucleotide and protein compositions, recombination, codon frequency, substitution rate, N- and O-glycosylation sites, signal peptide and cleavage site, transmembrane region, secondary structure of 5' and 3' UTRs and RNA-RNA interactions...
May 10, 2018: Pathogens and Global Health
https://www.readbyqxmd.com/read/29742014/complete-genomic-characterization-of-three-tick-borne-encephalitis-viruses-detected-along-the-china-north-korea-border-2011
#3
Xiaoxia He, Junwei Zhao, Shihong Fu, Lisi Yao, Xiaoyan Gao, Yan Liu, Ying He, Guodong Liang, Huanyu Wang
Tick-borne encephalitis virus (TBEV) causes neurological infections with serious sequelae in Europe and Northeast Asia. In China, the major epidemic areas are along the borders with Russia and North Korea. Although several TBEV isolates have been reported, the biological characteristics of the Chinese strains, especially those along the China-North Korea border, are unclear. In this study, we detected seven TBEV fragment sequences in 602 adult Dermacentor silvarum collected in the Changbai Mountain area of Jilin Province on the China-North Korea border and characterized the genome of three TBEV strains (JLCB11-08, JLCB11-35, and JLCB11-40)...
May 9, 2018: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/29713635/detection-of-tick-borne-pathogens-in-lambs-undergoing-prophylactic-treatment-against-ticks-on-two-swedish-farms
#4
Giulio Grandi, Anna Aspán, Jenny Pihl, Katarina Gustafsson, Fredrik Engström, Tomas Jinnerot, Robert Söderlund, Jan Chirico
Tick-borne pathogens (TBPs), especially Anaplasma phagocytophilum , cause disease in grazing livestock. Tick prophylaxis is, therefore, a routine practice in sheep flocks in Sweden, especially in central, southern, and coastal areas of the country where ixodid ticks ( Ixodes ricinus and Haemaphysalis punctata ) are present. In the present study, the status of infection by A. phagocytophilum and other TBPs in lambs treated with tick prophylaxis has been assessed serologically and with polymerase chain reaction (PCR)...
2018: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29709065/probing-chemical-space-of-tick-borne-encephalitis-virus-reproduction-inhibitors-with-organoselenium-compounds
#5
Alexey A Orlov, Anastasia A Eletskaya, Konstantin A Frolov, Anastasia D Golinets, Vladimir A Palyulin, Sergey G Krivokolysko, Liubov I Kozlovskaya, Victor V Dotsenko, Dmitry I Osolodkin
Tick-borne encephalitis virus (TBEV), a member of the genus Flavivirus, is the leading cause of arboviral neuroinfections in Europe. Only a few classes of the nucleoside and non-nucleoside inhibitors were investigated against TBEV reproduction. Paving the way to previously unexplored areas of anti-TBEV chemical space, we assessed the inhibition of TBEV reproduction in the plaque reduction assay by various compounds derived from cyanothioacetamide and cyanoselenoacetamide. Compounds from seven classes, including 4-(alkylthio)-2-aryl-3-azaspiro[5...
April 30, 2018: Archiv der Pharmazie
https://www.readbyqxmd.com/read/29691370/a-new-subtype-of-eastern-tick-borne-encephalitis-virus-discovered-in-qinghai-tibet-plateau-china
#6
Xiaoyi Dai, Guobao Shang, Shan Lu, Jing Yang, Jianguo Xu
Tick-borne encephalitis virus (TBEV) has been classified into three subtypes, namely the European (Eu-TBEV), Far Eastern (FE-TBEV), and Siberian (Sib-TBEV). In this study, we discovered a new subtype of TBEV in wild rodent Marmota himalayana in Qinghai-Tibet Plateau in China, proposed as subtype Himalayan (Him-TBEV). Two complete genomes of TBEV were obtained from respiratory samples of 200 marmots. The phylogenetic analysis using the E protein and polyprotein demonstrated that the two strains of Him-TBEV formed an independent branch, separated from Eu-TBEV, Sib-TBEV, and FE-TBEV...
April 25, 2018: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/29678403/tick-borne-encephalitis-virus-borrelia-burgdorferi-sensu-lato-borrelia-miyamotoi-anaplasma-phagocytophilum-and-candidatus-neoehrlichia-mikurensis-in-ixodes-ricinus-ticks-collected-from-recreational-islands-in-southern-norway
#7
Vivian Kjelland, Katrine M Paulsen, Rikke Rollum, Andrew Jenkins, Snorre Stuen, Arnulf Soleng, Kristin S Edgar, Heidi H Lindstedt, Kirsti Vaino, Moustafa Gibory, Åshild K Andreassen
The aim of this study was to determine the occurrence of tick-borne pathogens of medical importance in questing ticks collected from five recreationally used islands along the Norwegian coastline. Furthermore, since coinfection may affect the disease severity, this study aimed to determine the extent of coinfection in individual ticks or co-localization of tick-borne pathogens. In all, 4158 questing Ixodes ricinus ticks were analyzed. For detection of tick-borne encephalitis virus (TBEV), nymphs (3690) were analyzed in pools of ten...
April 12, 2018: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29669948/survey-of-tick-borne-zoonotic-viruses-in-wild-deer-in-hokkaido-japan
#8
Leo Uchida, Daisuke Hayasaka, Mya Myat Ngwe Tun, Kouichi Morita, Yasukazu Muramatsu, Katsuro Hagiwara
Tick-borne encephalitis (TBE) and severe fever with thrombocytopenia syndrome (SFTS) are both tick-borne zoonotic diseases caused by TBE virus (TBEV) and SFTS phlebovirus (SFTSV). In 2016, a second domestic TBE case was reported in Hokkaido, Japan, after an absence of 23 years. We conducted IgG ELISA for TBEV and SFTSV on 314 deer (Cervus nippon yesoensis) serum samples collected from 3 places in Hokkaido. There were 7 seropositive samples for TBEV but none for SFTSV by ELISA. The specificity of the 7 positive samples was confirmed by neutralization tests against TBEV, and 5 sera showed 320 to 640 of 50% focus reduction endpoint titers...
April 19, 2018: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29667575/a-cluster-of-two-human-cases-of-tick-borne-encephalitis-tbe-transmitted-by-unpasteurised-goat-milk-and-cheese-in-germany-may-2016
#9
S O Brockmann, R Oehme, T Buckenmaier, M Beer, A Jeffery-Smith, M Spannenkrebs, S Haag-Milz, C Wagner-Wiening, C Schlegel, J Fritz, S Zange, M Bestehorn, A Lindau, D Hoffmann, S Tiberi, U Mackenstedt, G Dobler
In May 2016, two cases of tick-borne encephalitis (TBE) were confirmed by serology (positive IgM and IgG antibodies against TBE virus (TBEV) in serum), with a possible link to raw milk and cheese from a goat farm in a region in Baden-Württemberg, Germany not previously known as TBE-endemic. The outbreak investigation identified 32 consumers of goat dairy products (29 consumers, one farm employee, two owners) of whom none had IgM antibodies against TBEV 3-8 weeks after consumption. Of the 27 notified TBE cases in the State, none reported consumption of raw goat milk or cheese from the suspected farm...
April 2018: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/29655579/hungarian-tick-borne-encephalitis-viruses-isolated-from-a-0-5-ha-focus-are-closely-related-to-finnish-strains
#10
László Egyed, Zsuzsanna Rónai, Ádám Dán
Four tick-borne encephalitis virus strains were isolated from a small 0.5-ha focus over a six-year-long period (2011-2016) in Hungary. Two strains with identical genomes were isolated from Ixodes ricinus and Haemaphysalis concinna two months apart, which shows that the virus had not evolved separately in these tick species. Whole-genome sequencing of the virus revealed that the isolates differed from each other in 4 amino acids and 9 nucleotides. The calculated substitution rates indicated that the speed of genome evolution differs from habitat to habitat, and continuously changes even within the same focus...
April 7, 2018: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29610047/comparison-of-three-commercial-igg-and-igm-elisa-kits-for-the-detection-of-tick-borne-encephalitis-virus-antibodies
#11
Rahel Ackermann-Gäumann, Marie-Lise Tritten, Mona Hassan, Reto Lienhard
Tick-borne encephalitis (TBE) is endemic in many parts of Europe and Asia. The diagnosis of this disease is essentially based on the demonstration of specific antibodies. For reasons of simplicity, automatization and quick availability of test results, enzyme-linked immunosorbent assays (ELISAs) are the method of choice for serological diagnosis of TBE. Here, we evaluated three commercially available anti-TBEV IgG and IgM ELISAs using 251 serum samples: the SERION ELISA classic FSME Virus/TBE Virus IgG and IgM kit (Virion\Serion), the RIDASCREEN® FSME/TBE IgG and IgM kit (R-Biopharm), and the anti-FSME/TBE virus ELISA "Vienna" IgG/anti-FSME/TBE virus ELISA IgM kit (Euroimmun)...
March 28, 2018: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29602685/intrathecal-expression-of-il-5-and-humoral-response-in-patients-with-tick-borne-encephalitis
#12
Sambor Grygorczuk, Piotr Czupryna, Sławomir Pancewicz, Renata Świerzbińska, Maciej Kondrusik, Justyna Dunaj, Joanna Zajkowska, Anna Moniuszko-Malinowska
AIM: The aim of the study was to assess the role of an early specific humoral response in human infection with a tick-borne encephalitis virus (TBEV) and the role of IL-5 as its potential mediator and marker. MATERIALS AND METHODS: The retrospective study involved a cohort of 199 patients diagnosed with TBE, in whom anti-TBEV IgM and IgG antibody titers were analyzed on admission and compared with clinical presentation and basic laboratory parameters. The prospective study included 50 TBE patients in whom IL-5 serum and CSF concentration was measured with ELISA on admission in the TBE neurologic phase and in selected patients before discharge, at follow-up or in samples obtained before the neurologic phase onset...
March 15, 2018: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29560357/crimean-congo-hemorrhagic-fever-virus-and-borrelia-burgdorferi-sensu-lato-in-ticks-from-kosovo-and-albania
#13
Kurtesh Sherifi, Agim Rexhepi, Kristaq Berxholi, Blerta Mehmedi, Rreze M Gecaj, Zamira Hoxha, Anja Joachim, Georg G Duscher
Tick-borne diseases pose a serious threat to human health in South-Eastern Europe, including Kosovo. While Crimean-Congo hemorrhagic fever (CCHF) is a well-known emerging infection in this area, there are no accurate data on Lyme borreliosis and tick-borne encephalitis (TBE). Therefore, we sampled and tested 795 ticks. Ixodes ricinus ( n  = 218), Dermacentor marginatus ( n  = 98), and Haemaphysalis spp. ( n  = 24) were collected from the environment by flagging (all from Kosovo), while Hyalomma marginatum ( n  = 199 from Kosovo, all from Kosovo) and Rhipicephalus bursa ( n  = 130, 126 from Albania) could be collected only by removal from animal pasture and domestic ruminants...
2018: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29555424/tick-borne-encephalitis-virus-in-arthropod-vectors-in-the-far-east-of-russia
#14
Natalia M Pukhovskaya, Olga V Morozova, Nelya P Vysochina, Nadejda B Belozerova, Svetlana V Bakhmetyeva, Nina I Zdanovskaya, Stephen J Seligman, Leonid I Ivanov
Isolates of tick-borne encephalitis virus (TBEV) from arthropod vectors (ticks and mosquitoes) in the Amur, the Jewish Autonomous and the Sakhalin regions as well as on the Khabarovsk territory of the Far East of Russia were studied. Different proportions of four main tick species of the family Ixodidae: Ixodes persulcatus P. Schulze, 1930; Haemaphysalis concinna Koch, 1844; Haemaphysalis japonica douglasi Nuttall et Warburton, 1915 and Dermacentor silvarum Olenev, 1932 were found in forests and near settlements...
May 2018: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29545014/identification-and-analysis-of-host-proteins-that-interact-with-the-3-untranslated-region-of-tick-borne-encephalitis-virus-genomic-rna
#15
Memi Muto, Wataru Kamitani, Mizuki Sakai, Minato Hirano, Shintaro Kobayashi, Hiroaki Kariwa, Kentaro Yoshii
Tick-borne encephalitis virus (TBEV) causes severe neurological disease, but the pathogenetic mechanism is unclear. The conformational structure of the 3'-untranslated region (UTR) of TBEV is associated with its virulence. We tried to identify host proteins interacting with the 3'-UTR of TBEV. Cellular proteins of HEK293T cells were co-precipitated with biotinylated RNAs of the 3'-UTR of low- and high-virulence TBEV strains and subjected to mass spectrometry analysis. Fifteen host proteins were found to bind to the 3'-UTR of TBEV, four of which-cold shock domain containing-E1 (CSDE1), spermatid perinuclear RNA binding protein (STRBP), fragile X mental retardation protein (FMRP), and interleukin enhancer binding factor 3 (ILF3)-bound specifically to that of the low-virulence strain...
April 2, 2018: Virus Research
https://www.readbyqxmd.com/read/29544502/cell-type-and-region-specific-restriction-of-neurotropic-flavivirus-infection-by-viperin
#16
Richard Lindqvist, Chaitanya Kurhade, Jonathan D Gilthorpe, Anna K Överby
BACKGROUND: Flaviviruses are a group of diverse and emerging arboviruses and an immense global health problem. A number of flaviviruses are neurotropic, causing severe encephalitis and even death. Type I interferons (IFNs) are the first line of defense of the innate immune system against flavivirus infection. IFNs elicit the concerted action of numerous interferon-stimulated genes (ISGs) to restrict both virus infection and replication. Viperin (virus-inhibitory protein, endoplasmic reticulum-associated, IFN-inducible) is an ISG with broad-spectrum antiviral activity against multiple flaviviruses in vitro...
March 15, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29437548/a-serosurvey-of-flavivirus-infection-in-horses-and-birds-in-slovakia
#17
Tomáš Csank, Petra Drzewnioková, Ľuboš Korytár, Peter Major, Miklós Gyuranecz, Juraj Pistl, Tamás Bakonyi
In central Europe, at least three flaviviruses circulate among vectors and vertebrate hosts. West Nile virus (WNV) and Usutu virus (USUV) are mosquito-borne viruses maintained in the nature by enzootic cycle between mosquitoes and birds. Tick-borne encephalitis virus (TBEV) is a flavivirus causing annual human cases in Slovakia. The aim of this study is the prevalence assessment of flavivirus infections in horses (n = 145) and birds (n = 109) by enzyme-linked immunosorbent assay (ELISA) and confirmation by neutralization test (VNT)...
April 2018: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/29435494/tick-borne-encephalitis-virus-vaccine-induced-human-antibodies-mediate-negligible-enhancement-of-zika-virus-infection-in-vitro-and-in-a-mouse-model
#18
James Duehr, Silviana Lee, Gursewak Singh, Gregory A Foster, David Krysztof, Susan L Stramer, Maria C Bermúdez González, Eva Menichetti, Robert Geretschläger, Christian Gabriel, Viviana Simon, Jean K Lim, Florian Krammer
Recent reports in the scientific literature have suggested that anti-dengue virus (DENV) and anti-West Nile virus (WNV) immunity exacerbates Zika virus (ZIKV) pathogenesis in vitro and in vivo in mouse models. Large populations of immune individuals exist for a related flavivirus (tick-borne encephalitis virus [TBEV]), due to large-scale vaccination campaigns and endemic circulation throughout most of northern Europe and the southern Russian Federation. As a result, the question of whether anti-TBEV immunity can affect Zika virus pathogenesis is a pertinent one...
January 2018: MSphere
https://www.readbyqxmd.com/read/29397225/second-five-year-follow-up-after-a-booster-vaccination-against-tick-borne-encephalitis-following-different-primary-vaccination-schedules-demonstrates-at-least-10-years-antibody-persistence
#19
Jiri Beran, Maria Lattanzi, Fang Xie, Luca Moraschini, Ilaria Galgani
BACKGROUND: Tick borne encephalitis (TBE) endemic zones are expanding. We previously evaluated long term persistence of antibody 5 years after the first booster immunization following different primary immunization schedules with the polygeline-free inactivated TBE vaccine (TBEvac) in adults and adolescents. Here, we report anti-TBE virus (TBEV) antibody persistence from 6 to 10 years post-booster administration. METHODS: This was a phase IV, open-label, single-center, second extension study (NCT01562444), conducted in Czechia...
February 1, 2018: Vaccine
https://www.readbyqxmd.com/read/29393021/evaluation-of-the-population-heterogeneity-of-tbev-laboratory-variants-using-high-throughput-sequencing
#20
Alexander G Litov, Andrey A Deviatkin, Irina A Goptar, Vladimir G Dedkov, Anatoly P Gmyl, Mikhail L Markelov, German A Shipulin, Galina G Karganova
We studied minor variants within two tick-borne encephalitis virus (TBEV) populations with a common ancestor: the mouse brain-adapted variant EK-328c and the tick-adapted variant M. High-throughput sequencing with custom amplicons from RT-PCR viral RNA was performed on Illumina MiSeq 2*250 paired-end v2 chemistry. Using the LowFreq program (default settings) and Sanger-sequenced consensus as a reference, variants with an abundance of 1 % and above within the studied populations were identified. Using the obtained data in the context of our previous studies, we concluded that TBEV variants, which are different from the major population phenotype and can become a major part of the viral population under favourable environmental conditions, can exist at abundances of less than 1 % in the long-term...
February 2018: Journal of General Virology
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