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Tick borne-encephalitis virus

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https://www.readbyqxmd.com/read/27918952/evaluation-of-nf-%C3%AE%C2%BAb-concentration-in-patients-with-tick-borne-encephalitis-neuroborreliosis-anaplasmosis-and-anaplasma-phagocythophilum-with-tick-borne-encephalitis-virus-co-infection
#1
Anna Moniuszko-Malinowska, Piotr Czupryna, Justyna Dunaj, Renata Swierzbinska, Katarzyna Guziejko, Ryszard Rutkowski, Joanna Zajkowska, Sambor Grygorczuk, Maciej Kondrusik, Sławomir Pancewicz
OBJECTIVES: The aim of the study was the evaluation of NF-κB concentration in serum and cerebrospinal fluid (CSF) of patients with diagnosis of tick-borne diseases: tick-borne encephalitis (TBE), neuroborreliosis (NB), anaplasmosis (ANA) and patients co-infected with tick-borne encephalitis virus and Anaplasma phagocythophilum (TBE+ANA). Additionally NF-κB concentration during acute and convalescent period was compared. METHODS: Sixty-seven patients with diagnosis of tick-borne diseases were included in the study...
December 2, 2016: Cytokine
https://www.readbyqxmd.com/read/27884572/tick-borne-encephalitis-virus-neutralization-by-high-dose-intravenous-immunoglobulin
#2
Jana Elsterova, Martin Palus, Jana Sirmarova, Jan Kopecky, Hans Helmut Niller, Daniel Ruzek
Tick-borne encephalitis (TBE) is a potentially lethal neuroinfection in humans, caused by TBE virus (TBEV). Currently, there are no approved therapeutic agents to treat TBE. Previously, it was suggested that application of high dose intravenous immunoglobulin (IVIG) may pose potentially successful treatment for severe cases of TBE. In this study, we determined the titers of TBEV-neutralizing antibodies in two IVIG lots originating from the same manufacturer, and tested their ability to treat a lethal TBEV-infection in a mouse model...
November 18, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/27875810/nonstructural-protein-1-of-tick-borne-encephalitis-virus-induces-oxidative-stress-and-activates-antioxidant-defense-by-the-nrf2-are-pathway
#3
Yulia V Kuzmenko, Olga A Smirnova, Alexander V Ivanov, Elizaveta S Starodubova, Vadim L Karpov
BACKGROUND: Infection with tick-borne encephalitis virus (TBEV) causes pathological changes in the central nervous system. However, the possible redox alterations in the infected cells that can contribute to the virus pathogenicity remain unknown. OBJECTIVE: In the current study we explored the ability of TBEV nonstructural protein 1 (NS1) to induce oxidative stress and activate antioxidant defense via the nuclear factor (erythroid-derived-2)-like 2/antioxidant response element (Nrf2/ARE) pathway...
November 23, 2016: Intervirology
https://www.readbyqxmd.com/read/27846275/prevalence-of-rickettsia-spp-in-ticks-and-serological-and-clinical-outcomes-in-tick-bitten-individuals-in-sweden-and-on-the-%C3%A3-land-islands
#4
Anders Lindblom, Katarina Wallménius, Johanna Sjöwall, Linda Fryland, Peter Wilhelmsson, Per-Eric Lindgren, Pia Forsberg, Kenneth Nilsson
Tick-transmitted diseases are an emerging health problem, and the hard tick Ixodes ricinus is the main vector for Borrelia spp., tick-borne encephalitis virus and most of the spotted fever Rickettsiae in Europe. The aim of the present study was to examine the incidence of rickettsial infection in the southernmost and south central parts of Sweden and the Åland Islands in Finland, the risk of infection in humans and its correlation with a bite of a Rickettsia-infected tick, the self-reported symptoms of rickettsial disease, and the prevalence of co-infection between Rickettsia spp...
2016: PloS One
https://www.readbyqxmd.com/read/27795275/complete-genome-sequence-of-a-low-virulence-tick-borne-encephalitis-virus-strain
#5
G Dobler, M Bestehorn, M Antwerpen, A Överby-Wernstedt
We report here the complete genome sequence (GenBank accession no. KX268728) of tick-borne encephalitis strain HB171/11, isolated from an Ixodes ricinus tick from a natural focus where human neurological disease is rare. The strain shows unique characteristics in neuroinvasiveness and neurovirulence.
October 20, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27776548/fast-type-i-interferon-response-protects-astrocytes-from-flavivirus-infection-and-virus-induced-cytopathic-effects
#6
Richard Lindqvist, Filip Mundt, Jonathan D Gilthorpe, Silke Wölfel, Nelson O Gekara, Andrea Kröger, Anna K Överby
BACKGROUND: Neurotropic flaviviruses such as tick-borne encephalitis virus (TBEV), Japanese encephalitis virus (JEV), West Nile virus (WNV), and Zika virus (ZIKV) are causative agents of severe brain-related diseases including meningitis, encephalitis, and microcephaly. We have previously shown that local type I interferon response within the central nervous system (CNS) is involved in the protection of mice against tick-borne flavivirus infection. However, the cells responsible for mounting this protective response are not defined...
October 24, 2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27765140/-progress-in-research-of-tick-borne-encephalitis
#7
Y Yang, Y D Du
Tick-borne encephalitis, also called forest encephalitis, is caused by tick-borne encephalitis virus. Central nervous system lesion is the major clinical symptom of tick-borne encephalitis, as an acute infectious disease, the case fatality rate is as high as 10%-20%. Virology experts consider it as a key and difficult point in recent years. This paper summarizes the progress in research of epidemiological characteristics, pathogenesis, clinical manifestations, outcome, diagnosis and treatment of tick-borne encephalitis to provide evidence for the prevention and treatment of tick-borne encephalitis...
October 10, 2016: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/27760182/revisiting-recombination-signal-in-the-tick-borne-encephalitis-virus-a-simulation-approach
#8
Yann J K Bertrand, Magnus Johansson, Peter Norberg
The hypothesis of wide spread reticulate evolution in Tick-Borne Encephalitis virus (TBEV) has recently gained momentum with several publications describing past recombination events involving various TBEV clades. Despite a large body of work, no consensus has yet emerged on TBEV evolutionary dynamics. Understanding the occurrence and frequency of recombination in TBEV bears significant impact on epidemiology, evolution, and vaccination with live vaccines. In this study, we investigated the possibility of detecting recombination events in TBEV by simulating recombinations at several locations on the virus' phylogenetic tree and for different lengths of recombining fragments...
2016: PloS One
https://www.readbyqxmd.com/read/27726774/emerging-foodborne-and-agriculture-related-viruses
#9
David H Kingsley
Viruses rapidly evolve and can emerge in unpredictable ways. Transmission pathways by which foodborne viruses may enter human populations and evolutionary mechanisms by which viruses can become virulent are discussed in this chapter. A majority of viruses emerge from zoonotic animal reservoirs, often by adapting and infecting intermediate hosts, such as domestic animals and livestock. Viruses that are known foodborne threats include hepatitis E virus, tick-borne encephalitis virus, enteroviruses, adenovirus, and astroviruses, among others...
August 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/27717318/recombinant-domains-iii-of-tick-borne-encephalitis-virus-envelope-protein-in-combination-with-dextran-and-cpgs-induce-immune-response-and-partial-protectiveness-against-tbe-virus-infection-in-mice
#10
Anna S Ershova, Olga A Gra, Alexander M Lyaschuk, Tatyana M Grunina, Artem P Tkachuk, Mikhail S Bartov, Darya M Savina, Olga V Sergienko, Zoya M Galushkina, Vladimir P Gudov, Liubov I Kozlovskaya, Ivan S Kholodilov, Larissa V Gmyl, Galina G Karganova, Vladimir G Lunin, Anna S Karyagina, Alexander L Gintsburg
BACKGROUND: E protein of tick-borne encephalitis virus (TBEV) and other flaviviruses is located on the surface of the viral particle. Domain III of this protein seems to be a promising component of subunit vaccines for prophylaxis of TBE and kits for diagnostics of TBEV. METHODS: Three variants of recombinant TBEV E protein domain III of European, Siberian and Far Eastern subtypes fused with dextran-binding domain of Leuconostoc citreum KM20 were expressed in E...
October 7, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27715427/tick-borne-encephalitis-what-travellers-should-know-when-visiting-an-endemic-country
#11
Aleš Chrdle, Vaclav Chmelik, Daniel Ruzek
Tick-borne encephalitis (TBE) is an acute febrile illness with neurological manifestations that is prevalent in forested areas of moderate climate in Europe and Asia. TBE virus is transmitted by ticks and rarely by unpasteurized milk and dairy products. The disease burden is attributed mainly to resulting long-term disability, especially in individuals over 50 years of age. Currently, there is no causative treatment, but a very effective vaccination is available with a good safety profile. The vaccination requires three basic doses to be fully effective and regular boosters afterwards...
August 15, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27702593/lipids-and-flaviviruses-present-and-future-perspectives-for-the-control-of-dengue-zika-and-west-nile-viruses
#12
REVIEW
Miguel A Martín-Acebes, Ángela Vázquez-Calvo, Juan-Carlos Saiz
Flaviviruses are emerging arthropod-borne pathogens that cause life-threatening diseases such as yellow fever, dengue, West Nile encephalitis, tick-borne encephalitis, Kyasanur Forest disease, tick-borne encephalitis, or Zika disease. This viral genus groups >50 viral species of small enveloped plus strand RNA virus that are phylogenetically closely related to hepatitis C virus. Importantly, the flavivirus life cycle is intimately associated to host cell lipids. Along this line, flaviviruses rearrange intracellular membranes from the endoplasmic-reticulum of the infected cells to develop adequate platforms for viral replication and particle biogenesis...
October 1, 2016: Progress in Lipid Research
https://www.readbyqxmd.com/read/27663720/the-role-of-mouse-2-5-oligoadenylate-synthetase-1-paralogs
#13
Enas Elkhateeb, Hassan T Tag-El-Din-Hassan, Nobuya Sasaki, Daisuke Torigoe, Masami Morimatsu, Takashi Agui
The interferon-induced oligoadenylate synthetase (OAS) family is one of the most important immune response proteins to the viral infection. The OAS protein binds dsRNA and is activated to produce 2',5'-oligoadenylates, which lead to the activation of latent form of RNase L, resulting in degradation of cellular and viral RNA and inhibition of viral replication. In mice, the Oas gene family locates on chromosome 5. The mouse Oas gene locus undergoes a recent series of duplication event, leading to the presence of eight paralogs of Oas1 genes (Oas1a through Oas1h) that forms Oas gene cluster with the Oas2, Oas3 and two OasL (OasL1 and OasL2) genes...
September 21, 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27642148/-tick-borne-encephalitis-in-a-child-in-a-nonendemic-country-a-case-report
#14
M Levy, M-T Abi-Warde, A-C Rameau, S Fafi-Kremer, Y Hansmann, M Fischbach, L Higel
Tick-borne encephalitis (TBE) is an arbovirus induced by tick-borne encephalitis virus (TBEV) transmitted by tick bite. The disease is rare in France (two to three cases per year) but endemic zones extend from Western Europe to the east coast of Asia (10,000-15,000 cases per year). An 8-year-old boy was admitted to our pediatric ward in Strasbourg (France) for febrile headache with diplopia. Four days after a tick bite, he declared a febrile headache together with maculopapular rash on the elbows, knees, and cheeks...
October 2016: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/27633257/a-serological-protein-microarray-for-detection-of-multiple-cross-reactive-flavivirus-infections-in-horses-for-veterinary-and-public-health-surveillance
#15
N B Cleton, K van Maanen, S A Bergervoet, N Bon, C Beck, G-J Godeke, S Lecollinet, R Bowen, D Lelli, N Nowotny, M P G Koopmans, C B E M Reusken
The genus Flavivirus in the family Flaviviridae includes some of the most important examples of emerging zoonotic arboviruses that are rapidly spreading across the globe. Japanese encephalitis virus (JEV), West Nile virus (WNV), St. Louis encephalitis virus (SLEV) and Usutu virus (USUV) are mosquito-borne members of the JEV serological group. Although most infections in humans are asymptomatic or present with mild flu-like symptoms, clinical manifestations of JEV, WNV, SLEV, USUV and tick-borne encephalitis virus (TBEV) can include severe neurological disease and death...
September 15, 2016: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/27626437/analysis-of-the-langat-virus-genome-in-persistent-infection-of-an-ixodes-scapularis-cell-line
#16
Luwanika Mlera, Wessam Melik, Danielle K Offerdahl, Eric Dahlstrom, Stephen F Porcella, Marshall E Bloom
Tick-borne flaviviruses (TBFVs) cause a broad spectrum of disease manifestations ranging from asymptomatic to mild febrile illness and life threatening encephalitis. These single-stranded positive-sense (ss(+)) RNA viruses are naturally maintained in a persistent infection of ixodid ticks and small-medium sized mammals. The development of cell lines from the ixodid ticks has provided a valuable surrogate system for studying the biology of TBFVs in vitro. When we infected ISE6 cells, an Ixodes scapularis embryonic cell line, with Langat virus (LGTV) we observed that the infection proceeded directly into persistence without any cytopathic effect...
2016: Viruses
https://www.readbyqxmd.com/read/27576490/tick-borne-encephalitis-virus-induces-chemokine-rantes-expression-via-activation-of-irf-3-pathway
#17
Xiaowei Zhang, Zhenhua Zheng, Xijuan Liu, Bo Shu, Panyong Mao, Bingke Bai, Qinxue Hu, Minhua Luo, Xiaohe Ma, Zongqiang Cui, Hanzhong Wang
BACKGROUND: Tick-borne encephalitis virus (TBEV) is one of the most important flaviviruses that targets the central nervous system (CNS) and causes encephalitides in humans. Although neuroinflammatory mechanisms may contribute to brain tissue destruction, the induction pathways and potential roles of specific chemokines in TBEV-mediated neurological disease are poorly understood. METHODS: BALB/c mice were intracerebrally injected with TBEV, followed by evaluation of chemokine and cytokine profiles using protein array analysis...
2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27569396/transmission-and-evolution-of-tick-borne-viruses
#18
REVIEW
Doug E Brackney, Philip M Armstrong
Ticks transmit a diverse array of viruses such as tick-borne encephalitis virus, Powassan virus, and Crimean-Congo hemorrhagic fever virus that are reemerging in many parts of the world. Most tick-borne viruses (TBVs) are RNA viruses that replicate using error-prone polymerases and produce genetically diverse viral populations that facilitate their rapid evolution and adaptation to novel environments. This article reviews the mechanisms of virus transmission by tick vectors, the molecular evolution of TBVs circulating in nature, and the processes shaping viral diversity within hosts to better understand how these viruses may become public health threats...
August 25, 2016: Current Opinion in Virology
https://www.readbyqxmd.com/read/27562931/first-human-case-of-tick-borne-encephalitis-virus-infection-acquired-in-the-netherlands-july-2016
#19
Joris A de Graaf, Johan H J Reimerink, G Paul Voorn, Elisabeth A Bij de Vaate, Ankje de Vries, Barry Rockx, Alie Schuitemaker, Vishal Hira
In July 2016, the first autochthonous case of tick-borne encephalitis was diagnosed in the Netherlands, five days after a report that tick-borne encephalitis virus (TBEV) had been found in Dutch ticks. A person in their 60s without recent travel history suffered from neurological symptoms after a tick bite. TBEV serology was positive and the tick was positive in TBEV qRT-PCR. TBEV infection should be considered in patients with compatible symptoms in the Netherlands.
August 18, 2016: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/27548676/utilisation-of-isa-reverse-genetics-and-large-scale-random-codon-re-encoding-to-produce-attenuated-strains-of-tick-borne-encephalitis-virus-within-days
#20
Lauriane de Fabritus, Antoine Nougairède, Fabien Aubry, Ernest A Gould, Xavier de Lamballerie
Large-scale codon re-encoding is a new method of attenuating RNA viruses. However, the use of infectious clones to generate attenuated viruses has inherent technical problems. We previously developed a bacterium-free reverse genetics protocol, designated ISA, and now combined it with large-scale random codon-re-encoding method to produce attenuated tick-borne encephalitis virus (TBEV), a pathogenic flavivirus which causes febrile illness and encephalitis in humans. We produced wild-type (WT) and two re-encoded TBEVs, containing 273 or 273+284 synonymous mutations in the NS5 and NS5+NS3 coding regions respectively...
2016: PloS One
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