keyword
MENU ▼
Read by QxMD icon Read
search

Tbev

keyword
https://www.readbyqxmd.com/read/28814513/escape-of-tick-borne-flavivirus-from-2-c-methylated-nucleoside-antivirals-is-mediated-by-a-single-conservative-mutation-in-ns5-that-has-a-dramatic-effect-on-viral-fitness
#1
Ludek Eyer, Hirofumi Kondo, Darina Zouharova, Minato Hirano, James J Valdés, Memi Muto, Tomas Kastl, Shintaro Kobayashi, Jan Haviernik, Manabu Igarashi, Hiroaki Kariwa, Marketa Vaculovicova, Jiri Cerny, Rene Kizek, Andrea Kröger, Stefan Lienenklaus, Milan Dejmek, Radim Nencka, Martin Palus, Jiri Salat, Erik De Clercq, Kentaro Yoshii, Daniel Ruzek
Tick-borne encephalitis virus (TBEV) causes a severe and potentially fatal neuroinfection in humans. Despite its high medical relevance, no specific antiviral therapy is currently available. Here we demonstrate that treatment with a nucleoside analog, 7-deaza-2' -C-methyladenosine (7-deaza-2' -CMA), substantially improved disease outcome, increased survival, and reduced signs of neuroinfection and viral titers in the brains of mice infected with a lethal dose of TBEV. To investigate the mechanism of action of 7-deaza-2' -CMA, two drug-resistant TBEV clones were generated and characterized...
August 16, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28791846/serum-carnitine-and-acyl-carnitine-in-patients-with-meningitis-due-to-tick-borne-encephalitis-virus-infection
#2
Alina Kępka, Roman M Janas, Sławomir A Pancewicz, Renata Świerzbińska
BACKGROUND: Hard ticks are the main vectors of tick-borne encephalitis virus (TBEV). Free carnitine (FC) and acylcarnitines (AC) have the basic role in β-oxidation as well as the modulation of immune and nervous system. Homeostasis of carnitines in the TBE patients was not studied so far. OBJECTIVES: This study aimed to evaluate FC and AC serum concentrations in patients with meningitis due to TBEV infection before and after 14 ± 3 days of treatment. MATERIAL AND METHODS: The study was performed in 14 patients aged 48 ± 29 years that were divided a posteriori (based on their FC level before and after treatment) into 2 subgroups: 1-8 and 9-14...
March 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28762591/ean-consensus-review-on-prevention-diagnosis-and-management-of-tick-borne-encephalitis
#3
REVIEW
P Taba, E Schmutzhard, P Forsberg, I Lutsar, U Ljøstad, Å Mygland, I Levchenko, F Strle, I Steiner
BACKGROUND AND PURPOSE: Tick-borne encephalitis (TBE) is an infection of the central nervous system (CNS) caused by tick-borne encephalitis virus (TBEV) and transmitted by ticks, with a variety of clinical manifestations. The incidence of TBE in Europe is increasing due to an extended season of the infection and the enlargement of endemic areas. Our objectives are to provide recommendations on the prevention, diagnosis and management of TBE, based on evidence or consensus decisions. METHODS: For systematic evaluation, the literature was searched from 1970 to 2015 (including early online publications of 2016), and recommendations were based on evidence or consensus decisions of the Task Force when evidence-based data were not available...
August 1, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28728557/the-impact-of-illegal-waste-sites-on-a-transmission-of-zoonotic-viruses
#4
Darja Duh, Sandra Hasic, Elena Buzan
BACKGROUND: Illegal waste disposal impacts public health and causes aesthetic and environmental pollution. Waste disposed in places without permitted and controlled facilities can provide a ready source of nutrition and shelter for rodents and thus promote the spread of their ecto- and endoparasites. The presence of two distinct zoonotic viruses, lymphocytic choriomeningitis virus (LCMV) and tick-borne encephalitis virus (TBEV), was searched at illegal waste sites. The aim of this study was to determine the prevalence of infection with both viruses in rodents and to discuss the virus-rodent relations in such environments...
July 20, 2017: Virology Journal
https://www.readbyqxmd.com/read/28717654/fusion-to-flaviviral-leader-peptide-targets-hiv-1-reverse-transcriptase-for-secretion-and-reduces-its-enzymatic-activity-and-ability-to-induce-oxidative-stress-but-has-no-major-effects-on-its-immunogenic-performance-in-dna-immunized-mice
#5
Anastasia Latanova, Stefan Petkov, Yulia Kuzmenko, Athina Kilpeläinen, Alexander Ivanov, Olga Smirnova, Olga Krotova, Sergey Korolev, Jorma Hinkula, Vadim Karpov, Maria Isaguliants, Elizaveta Starodubova
Reverse transcriptase (RT) is a key enzyme in viral replication and susceptibility to ART and a crucial target of immunotherapy against drug-resistant HIV-1. RT induces oxidative stress which undermines the attempts to make it immunogenic. We hypothesized that artificial secretion may reduce the stress and make RT more immunogenic. Inactivated multidrug-resistant RT (RT1.14opt-in) was N-terminally fused to the signal providing secretion of NS1 protein of TBEV (Ld) generating optimized inactivated Ld-carrying enzyme RT1...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28714929/synchronous-langat-virus-infection-of-haemaphysalis-longicornis-using-anal-pore-microinjection
#6
Melbourne Rio Talactac, Kentaro Yoshii, Emmanuel Pacia Hernandez, Kodai Kusakisako, Remil Linggatong Galay, Kozo Fujisaki, Masami Mochizuki, Tetsuya Tanaka
The tick-borne encephalitis virus (TBEV) serocomplex of flaviviruses consists of arboviruses that cause important diseases in animals and humans. The transmission of this group of viruses is commonly associated with tick species such as Ixodes spp., Dermacentor spp., and Hyalomma spp. In the case of Haemaphysalis longicornis, the detection and isolation of flaviviruses have been previously reported. However, studies showing survival dynamics of any tick-borne flavivirus in H. longicornis are still lacking. In this study, an anal pore microinjection method was used to infect adult H...
July 17, 2017: Viruses
https://www.readbyqxmd.com/read/28705180/etiology-and-prognosis-of-acute-viral-encephalitis-and-meningitis-in-chinese-children-a-multicentre-prospective-study
#7
Junhong Ai, Zhengde Xie, Gang Liu, Zongbo Chen, Yong Yang, Yuning Li, Jing Chen, Guo Zheng, Kunling Shen
BACKGROUND: In China, there were few studies about the pathogens of acute viral encephalitis and meningitis in children in recent years. The aims of this study were to characterize the etiology and prognosis of acute viral encephalitis and meningitis in Chinese children. METHODS: This was a multicentre prospective study. Two hundred and sixty one viral encephalitis patients and 285 viral meningitis patients were enrolled. The mean age of viral encephalitis and meningitis were 5...
July 14, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28693561/goats-as-sentinel-hosts-for-the-detection-of-tick-borne-encephalitis-risk-areas-in-the-canton-of-valais-switzerland
#8
Nadia Rieille, Christine Klaus, Donata Hoffmann, Olivier Péter, Maarten J Voordouw
BACKGROUND: Tick-borne encephalitis (TBE) is an important tick-borne disease in Europe. Detection of the TBE virus (TBEV) in local populations of Ixodes ricinus ticks is the most reliable proof that a given area is at risk for TBE, but this approach is time-consuming and expensive. A cheaper and simpler approach is to use immunology-based methods to screen vertebrate hosts for TBEV-specific antibodies and subsequently test the tick populations at locations with seropositive animals. RESULTS: The purpose of the present study was to use goats as sentinel animals to identify new risk areas for TBE in the canton of Valais in Switzerland...
July 11, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28675837/perylenyltriazoles-inhibit-reproduction-of-enveloped-viruses
#9
Andrey V Aralov, Gleb V Proskurin, Alexey A Orlov, Liubov I Kozlovskaya, Alexey A Chistov, Sergey V Kutyakov, Galina G Karganova, Vladimir A Palyulin, Dmitry I Osolodkin, Vladimir A Korshun
1-Substituted 4-perylen-2(3)-yl-1,2,3-triazoles, easily accessible by 'click' reaction and combining in one molecule a polyaromatic unit and a nitrogen heterocycle, were found to strongly inhibit the reproduction of enveloped viruses. 5-[4-(Perylen-3-yl)-1,2,3-triazol-1-yl]-uridine and 2-[1-(2-hydroxyethyl)-1,2,3-triazol-4-yl]perylene show EC50 of 0.031 and 0.023 μM, respectively, against tick-borne encephalitis virus (TBEV). Remarkably, the nucleoside unit appears to be not essential for antiviral activity...
June 8, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28654319/partial-characterization-of-tick-borne-encephalitis-virus-isolates-from-ticks-of-southern-ukraine
#10
Oksana O Yurchenko, Dmytro O Dubina, Nataliya O Vynograd, Jean-Paul Gonzalez
Tick-borne encephalitis (TBE) is the most common tick-borne viral infection in Eurasia; thousands of human cases are annually reported from several European countries. Several tick species are vectors of the tick-borne encephalitis virus (TBEV), while TBE appears to be spreading from the Eurasian continent westward to Europe. Fifteen study sites were chosen from five territories of southern Ukraine, including Odessa, Mykolaiv, Kherson Oblast, the Autonomous Republic of Crimea, and Sevastopol. Tick collection was performed in spring season of three consecutive years (1988-1990) using either flagging technique or direct collection of specimens feeding on cattle...
August 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28632298/patient-med-tbe-f%C3%A3-rb%C3%A3-ttrades-snabbt-vid-behandling-med-kortison-evidens-saknas-dock-f%C3%A3-r-v%C3%A3-rdet-av-immunmodulerande-terapi
#11
Carl Wengse, Jesper Ericsson, Susanna Hallberg, Johan Ursing
Rapid improvement of tick-borne encephalitis after treatment with corticosteroids Tick-borne encephalitis (TBE) is a viral disease transmitted by ticks. The virus is divided into three subtypes named Western, Siberian and Far Eastern TBE virus (TBEV). Western TBEV is endemic in parts of Europe and Sweden and typically causes a biphasic illness with influenza-like symptoms followed by neurological symptoms ranging from mild meningitis to severe meningoencephalitis and death. Despite an effective vaccine, TBE is increasing in Sweden and Europe...
June 16, 2017: Läkartidningen
https://www.readbyqxmd.com/read/28631054/adaptation-of-tick-borne-encephalitis-virus-from-human-brain-to-different-cell-cultures-induces-multiple-genomic-substitutions
#12
Eugenia P Ponomareva, Vladimir A Ternovoi, Tamara P Mikryukova, Elena V Protopopova, Anastasia V Gladysheva, Alexander N Shvalov, Svetlana N Konovalova, Eugene V Chausov, Valery B Loktev
The C11-13 strain from the Siberian subtype of tick-borne encephalitis virus (TBEV) was isolated from human brain using pig embryo kidney (PEK), 293, and Neuro-2a cells. Analysis of the complete viral genome of the C11-13 variants during six passages in these cells revealed that the cell-adapted C11-13 variants had multiple amino acid substitutions as compared to TBEV from human brain. Seven out of eight amino acids substitutions in the high-replicating C11-13(PEK) variant mapped to non-structural proteins; 13 out of 14 substitutions in the well-replicating C11-13(293) variant, and all four substitutions in the low-replicating C11-13(Neuro-2a) variant were also localized in non-structural proteins, predominantly in the NS2a (2), NS3 (6) and NS5 (3) proteins...
June 19, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28570620/viral-etiologies-in-adult-patients-with-encephalitis-in-poland-a-prospective-single-center-study
#13
Marta Popiel, Karol Perlejewski, Agnieszka Bednarska, Tomasz Dzieciątkowski, Marcin Paciorek, Dariusz Lipowski, Monika Jabłonowska, Hanna Czeszko-Paprocka, Iwona Bukowska-Ośko, Kamila Caraballo Cortes, Agnieszka Pawełczyk, Maria Fic, Andrzej Horban, Marek Radkowski, Tomasz Laskus
Encephalitis is a severe neurological syndrome associated with high morbidity and mortality as well as long-term neurological sequelae. Despite being an important public health problem, very few extensive population-based studies were conducted so far in the world and none in Central Europe. Altogether 114 consecutive patients meeting the initial criteria for encephalitis were enrolled at the Warsaw Hospital for Infectious Diseases between June 2012 and July 2015. Eighteen patients were secondarily excluded from the analysis due to incomplete data or noinfectious cause...
2017: PloS One
https://www.readbyqxmd.com/read/28542611/no-molecular-or-serological-evidence-of-zikavirus-infection-among-healthy-blood-donors-living-in-or-travelling-to-regions-where-aedes-albopictus-circulates
#14
Wegene Borena, Tamara Hofer, Karin Stiasny, Stephan W Aberle, Manfred Gaber, Dorothee von Laer, Harald Schennach
BACKGROUND: Previous studies have shown that Zika virus can infect and be transmitted by A. albopictus. The World Health organization (WHO) has raised concerns of autochthonous transmission of the virus in regions where the vector is endemic. The aim of this pilot study was to assess the occurrence of Zika virus (ZIKV) in western Austria (Tyrol) especially after a history of travel to A. albopictus endemic regions. METHODS: The study participants were healthy blood donors at randomly selected donation sites in the west Austrian region Tyrol...
2017: PloS One
https://www.readbyqxmd.com/read/28518024/tick-borne-encephalitis-virus-in-ticks-and-roe-deer-the-netherlands
#15
Setareh Jahfari, Ankje de Vries, Jolianne M Rijks, Steven Van Gucht, Harry Vennema, Hein Sprong, Barry Rockx
We report the presence of tick-borne encephalitis virus (TBEV) in the Netherlands. Serologic screening of roe deer found TBEV-neutralizing antibodies with a seroprevalence of 2%, and TBEV RNA was detected in 2 ticks from the same location. Enhanced surveillance and awareness among medical professionals has led to the identification of autochthonous cases.
June 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28504447/tick-infestation-of-small-mammals-in-an-english-woodland
#16
Benjamin Cull, Alexander G C Vaux, Lisa J Ottowell, Emma L Gillingham, Jolyon M Medlock
Tick infestations on small mammals were studied from April to November, 2010, in deciduous woodland in southern England in order to determine whether co-infestations with tick stages occurred on small mammals, a key requirement for endemic transmission of tick-borne encephalitis virus (TBEV). A total of 217 small mammals was trapped over 1,760 trap nights. Yellow-necked mice (Apodemus flavicollis) made up the majority (52.5%) of animals, followed by wood mice (A. sylvaticus) 35.5% and bank voles (Myodes glareolus) 12%...
June 2017: Journal of Vector Ecology: Journal of the Society for Vector Ecology
https://www.readbyqxmd.com/read/28504357/a-nationwide-seroprevalence-screening-for-west-nile-virus-and-tick-borne-encephalitis-virus-in-the-population-of-bulgaria
#17
Iva Christova, Elitsa Panayotova, Simona Tchakarova, Evgenia Taseva, Iva Trifonova, Teodora Gladnishka
To assess local circulation and risk for human infections with West Nile virus (WNV) and Tick-borne encephalitis virus (TBEV) in Bulgaria, a nationwide seroprevalence study was conducted. In total, 1451 residents of all 28 districts in Bulgaria were tested for WNV-specific and TBEV-specific IgG antibodies. The survey found overall seroprevalence of 1.5% and 0.6%, respectively. The highest WNV seroprevalence was found in Sofia Province and districts near the river Danube. TBEV circulation was detected among residents of six districts...
May 15, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28487561/crowdsourcing-based-nationwide-tick-collection-reveals-the-distribution-of-ixodes-ricinus-and-i-persulcatus-and-associated-pathogens-in-finland
#18
Maija Laaksonen, Eeva Sajanti, Jani J Sormunen, Ritva Penttinen, Jari Hänninen, Kai Ruohomäki, Ilari Sääksjärvi, Eero J Vesterinen, Ilppo Vuorinen, Jukka Hytönen, Tero Klemola
A national crowdsourcing-based tick collection campaign was organized in 2015 with the objective of producing novel data on tick distribution and tick-borne pathogens in Finland. Nearly 20 000 Ixodes ticks were collected. The collected material revealed the nationwide distribution of I. persulcatus for the first time and a shift northwards in the distribution of I. ricinus in Finland. A subset of 2038 tick samples containing both species was screened for Borrelia burgdorferi sensu lato (the prevalence was 14...
May 10, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28453842/a-cluster-of-fatal-tick-borne-encephalitis-virus-infection-in-organ-transplant-setting
#19
Dariusz Lipowski, Marta Popiel, Karol Perlejewski, Shota Nakamura, Iwona Bukowska-Osko, Ewa Rzadkiewicz, Tomasz Dzieciatkowski, Anna Milecka, Wojciech Wenski, Michal Ciszek, Alicja Debska-Slizien, Ewa Ignacak, Kamila Caraballo Cortes, Agnieszka Pawelczyk, Andrzej Horban, Marek Radkowski, Tomasz Laskus
Background.: Tick-borne encephalitis virus (TBEV) infection has become a major health problem in Europe and is currently a common cause of viral brain infection in many countries. Encephalitis in transplant recipients, althrough rare, is becoming a recognized complication. Our study provides the first description of transmission of TBEV through transplantation of solid organs. Methods.: Three patients who received solid organ transplants from a single donor (2 received kidney, and 1 received liver) developed encephalitis 17-49 days after transplantation and subsequently died...
March 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28432926/tick-borne-encephalitis-virus-infects-human-brain-microvascular-endothelial-cells-without-compromising-blood-brain-barrier-integrity
#20
Martin Palus, Marie Vancova, Jana Sirmarova, Jana Elsterova, Jan Perner, Daniel Ruzek
Alteration of the blood-brain barrier (BBB) is a hallmark of tick-borne encephalitis (TBE), a life-threating human viral neuroinfection. However, the mechanism of BBB breakdown during TBE, as well as TBE virus (TBEV) entry into the brain is unclear. Here, primary human microvascular endothelial cells (HBMECs) were infected with TBEV to study interactions with the BBB. Although the number of infected cells was relatively low in culture (<5%), the infection was persistent with high TBEV yields (>10(6)pfu/ml)...
July 2017: Virology
keyword
keyword
43276
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"