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Tick borne-encephalitis virus

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https://www.readbyqxmd.com/read/28545923/seropersistence-of-tbe-virus-antibodies-10-years-after-first-booster-vaccination-and-response-to-a-second-booster-vaccination-with-fsme-immun-0-5ml-in-adults
#1
R Konior, J Brzostek, E M Poellabauer, Q Jiang, L Harper, W Erber
Tick-borne encephalitis (TBE) is a viral disease that can have a severe acute clinical course and considerable long-term morbidity. As there is no causal treatment currently available for TBE, vaccination is the only way to combat the disease in endemic areas. The studies presented here were conducted to obtain prospective long-term TBE serum antibody persistence data of subjects up to 10years after the first booster with FSME-IMMUN. This report presents the results of 2 follow-up studies in the same study population of 315 healthy adults...
May 22, 2017: Vaccine
https://www.readbyqxmd.com/read/28545549/detection-and-genetic-characterization-of-a-wide-range-of-infectious-agents-in-ixodes-pavlovskyi-ticks-in-western-siberia-russia
#2
Vera Rar, Natalia Livanova, Sergey Tkachev, Galina Kaverina, Artem Tikunov, Yuliya Sabitova, Yana Igolkina, Victor Panov, Stanislav Livanov, Nataliya Fomenko, Igor Babkin, Nina Tikunova
BACKGROUND: The Ixodes pavlovskyi tick species, a member of the I. persulcatus/I. ricinus group, was discovered in the middle of the 20(th) century in the Russian Far East. Limited data have been reported on the detection of infectious agents in this tick species. The aim of this study was to investigate the prevalence and genetic variability of a wide range of infectious agents in I. pavlovskyi ticks collected in their traditional and recently invaded habitats, the Altai Mountains and Novosibirsk Province, respectively, which are both located within the Western Siberian part of the I...
May 25, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28526419/a-brief-history-of-the-discovery-of-tick-borne-encephalitis-virus-in-the-late-1930s-based-on-reminiscences-of-members-of-the-expeditions-their-colleagues-and-relatives
#3
REVIEW
Vladimir I Zlobin, Vanda V Pogodina, Olaf Kahl
Tick-borne encephalitis virus is the etiological agent of a severe human disease transmitted by hard ticks. It occurs in large parts of eastern, central, and western Asia and in Europe with thousands of human cases each year. Here, the discovery of the virus by Soviet scientists in the late 1930s in the Far East is described. The pioneering work involved with this discovery, which resulted in great scientific and epidemiological achievement, was undertaken under the most difficult conditions, and some of the scientists and their technical assistants paid for it with their health and even their lives...
May 5, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28518024/tick-borne-encephalitis-virus-in-ticks-and-roe-deer-the-netherlands
#4
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/28506240/inhibitors-compounds-of-the-flavivirus-replication-process
#5
REVIEW
Leidy L García, Leonardo Padilla, Jhon C Castaño
Flaviviruses are small viruses with single-stranded RNA, which include the yellow fever virus, dengue virus, West Nile virus, Japanese encephalitis virus, tick-borne encephalitis virus, and Zika virus; and are causal agents of the most important emerging diseases that have no available treatment to date. In recent years, the strategy has focused on the development of replication inhibitors of these viruses designed to act mainly by affecting the activity of enzyme proteins, such as NS3 and NS5, which perform important functions in the viral replication process...
May 15, 2017: Virology Journal
https://www.readbyqxmd.com/read/28504633/-tick-borne-infections-in-denmark
#6
Bo Bødker Jensen, Lukas Frans Ocias, Nanna Skaarup Andersen, Ram Benny Dessau, Karen Angeliki Krogfelt, Sigurdur Skarphedinsson
The castor bean tick, Ixodes ricinus, is common in woodlands in most of Denmark. Besides Borrelia burgdorferi, it can harbour a number of pathogenic microorganisms such as tick-borne encephalitis virus, Anaplasma phagocytophilum, Rickettsia helvetica, Francisella tularensis, Candidatus Neoehrlichia mikurensis, Bartonella spp., Borrelia miyamotoi and Babesia spp. These tick-borne infections should be a differential diagnostic consideration during the tick season in Denmark. We review the distribution, clinical manifestations, diagnosis and treatment of these microorganisms...
May 15, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28504447/tick-infestation-of-small-mammals-in-an-english-woodland
#7
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
#8
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 6 districts...
May 15, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28501619/a-label-free-immunoassay-for-flavivirus-detection-by-the-reflective-phantom-interface-technology
#9
Giovanni Tagliabue, Valentina Faoro, Serena Rizzo, Daniele Sblattero, Andrea Saccani, Gabriele Riccio, Tommaso Bellini, Matteo Salina, Marco Buscaglia, Alessandro Marcello
Members of Flaviviridae are widespread and cause clinically relevant arboviral diseases that impact locally and as imported travel-related infections. Direct detection of viraemia is limited, being typically undetectable at onset of symptoms. Therefore, diagnosis is primarily based on serology, which is complicated by high cross-reactivity across different species. The overlapping geographical distribution of the vectors in areas with a weak healthcare system, the increase of international travel and the similarity of symptoms highlight the need for rapid and reliable multi-parametric diagnostic tests in point-of-care formats...
May 10, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28498740/powassan-virus-an-emerging-arbovirus-of-public-health-concern-in-north-america
#10
Meghan E Hermance, Saravanan Thangamani
Powassan virus (POWV, Flaviviridae) is the only North American member of the tick-borne encephalitis serogroup of flaviviruses. It is transmitted to small- and medium-sized mammals by Ixodes scapularis, Ixodes cookei, and several other Ixodes tick species. Humans become infected with POWV during spillover transmission from the natural transmission cycles. In humans, POWV is the causative agent of a severe neuroinvasive illness with 50% of survivors displaying long-term neurological sequelae. POWV was recognized as a human pathogen in 1958 when a young boy died of severe encephalitis in Powassan, Ontario, and POWV was isolated from the brain autopsy of this case...
May 12, 2017: Vector Borne and Zoonotic Diseases
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
#11
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/28468299/historical-perspectives-on-flavivirus-research
#12
REVIEW
Michael R Holbrook
The flaviviruses are small single-stranded RNA viruses that are typically transmitted by mosquito or tick vectors. These "arboviruses" are found around the world and account for a significant number of cases of human disease. The flaviviruses cause diseases ranging from mild or sub-clinical infections to lethal hemorrhagic fever or encephalitis. In many cases, survivors of neurologic flavivirus infections suffer long-term debilitating sequelae. Much like the emergence of West Nile virus in the United States in 1999, the recent emergence of Zika virus in the Americas has significantly increased the awareness of mosquito-borne viruses...
April 30, 2017: Viruses
https://www.readbyqxmd.com/read/28457486/vaccination-against-louping-ill-virus-protects-goats-from-experimental-challenge-with-spanish-goat-encephalitis-virus
#13
L M Salinas, R Casais, J F García Marín, K P Dalton, L J Royo, A Del Cerro, E Gayo, M P Dagleish, P Alberdi, R A Juste, J de la Fuente, A Balseiro
Spanish goat encephalitis virus (SGEV) is a recently described member of the genus Flavivirus belonging to the tick-borne encephalitis group of viruses, and is closely related to louping ill virus (LIV). Naturally acquired disease in goats results in severe, acute encephalitis and 100% mortality. Eighteen goats were challenged subcutaneously with SGEV; nine were vaccinated previously against LIV and nine were not. None of the vaccinated goats showed any clinical signs of disease or histological lesions, but all of the non-vaccinated goats developed pyrexia and 5/9 developed neurological clinical signs, primarily tremors in the neck and ataxia...
April 28, 2017: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/28453842/a-cluster-of-fatal-tick-borne-encephalitis-virus-infection-in-organ-transplant-setting
#14
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
#15
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)...
April 19, 2017: Virology
https://www.readbyqxmd.com/read/28421048/functional-information-stored-in-the-conserved-structural-rna-domains-of-flavivirus-genomes
#16
REVIEW
Alba Fernández-Sanlés, Pablo Ríos-Marco, Cristina Romero-López, Alfredo Berzal-Herranz
The genus Flavivirus comprises a large number of small, positive-sense single-stranded, RNA viruses able to replicate in the cytoplasm of certain arthropod and/or vertebrate host cells. The genus, which has some 70 member species, includes a number of emerging and re-emerging pathogens responsible for outbreaks of human disease around the world, such as the West Nile, dengue, Zika, yellow fever, Japanese encephalitis, St. Louis encephalitis, and tick-borne encephalitis viruses. Like other RNA viruses, flaviviruses have a compact RNA genome that efficiently stores all the information required for the completion of the infectious cycle...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28399176/pathological-findings-in-the-red-fox-vulpes-vulpes-stone-marten-martes-foina-and-raccoon-dog-nyctereutes-procyonoides-with-special-emphasis-on-infectious-and-zoonotic-agents-in-northern-germany
#17
Charlotte Lempp, Nicole Jungwirth, Miguel L Grilo, Anja Reckendorf, Arlena Ulrich, Abbo van Neer, Rogier Bodewes, Vanessa M Pfankuche, Christian Bauer, Albert D M E Osterhaus, Wolfgang Baumgärtner, Ursula Siebert
Anthropogenic landscape changes contributed to the reduction of availability of habitats to wild animals. Hence, the presence of wild terrestrial carnivores in urban and peri-urban sites has increased considerably over the years implying an increased risk of interspecies spillover of infectious diseases and the transmission of zoonoses. The present study provides a detailed characterisation of the health status of the red fox (Vulpes vulpes), stone marten (Martes foina) and raccoon dog (Nyctereutes procyonoides) in their natural rural and peri-urban habitats in Schleswig-Holstein, Germany between November 2013 and January 2016 with focus on zoonoses and infectious diseases that are potentially threatening to other wildlife or domestic animal species...
2017: PloS One
https://www.readbyqxmd.com/read/28378977/prevalence-of-infections-and-co-infections-with-6-pathogens-in-dermacentor-reticulatus-ticks-collected-in-eastern-poland
#18
Violetta Zając, Angelina Wójcik-Fatla, Anna Sawczyn, Ewa Cisak, Jacek Sroka, Anna Kloc, Zbigniew Zając, Alicja Buczek, Jacek Dutkiewicz, Katarzyna Bartosik
Occurrence of co-infections with various pathogens in ixodid ticks creates a risk of increased severity of tick-borne diseases in humans and animals exposed to bite of the ticks carrying multiple pathogens. Accordingly, co-infections in ticks were subject of numerous analyses, but almost exclusively with regard to Ixodes ricinus complex whereas potential tick vectors belonging to other genera were much less studied. Taking into consideration the role of Dermacentor reticulatus in the transmission of various pathogens, we carried out for the first time the comprehensive statistical analysis of co-infections occurring in this tick species...
March 21, 2017: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/28362566/impact-of-air-temperature-variation-on-the-ixodid-ticks-habitat-and-tick-borne-encephalitis-incidence-in-the-russian-arctic-the-case-of-the-komi-republic
#19
N Tokarevich, A Tronin, B Gnativ, B Revich, O Blinova, B Evengard
BACKGROUND: The causes of the recent rise of tick-borne encephalitis (TBE) incidence in Europe are discussed. Our objective was to estimate the impact of air temperature change on TBE incidence in the European part of the Russian Arctic. METHODS: We analysed the TBE incidence in the Komi Republic (RK) over a 42-year period in relation to changes in local annual average air temperature, air temperature during the season of tick activity, tick abundance, TBE-prevalence in ticks, tick-bite incidence rate, and normalised difference vegetation index within the area under study...
2017: International Journal of Circumpolar Health
https://www.readbyqxmd.com/read/28361287/characteristics-of-far-eastern-strains-of-tick-borne-encephalitis-virus
#20
Galina N Leonova, Sergei I Belikov, Ilya G Kondratov
A comparative study of biological, molecular and genetic characteristics of a collection of ten strains of tick-borne encephalitis virus (TBEV) isolated in Primorsky Krai before 1960 and stored in a lyophilized state for a prolonged period (over 65 years) is presented. The collection includes the Sofjin strain isolated from the brain of a fatal case in Primorsky Krai in 1937 and transferred to the Scientific Research Institute of Epidemiology and Microbiology (Vladivostok) in 1953. All lyophilized viral strains demonstrated great preservation and high infectious activity in the model of 2-day-old non-inbred mice...
March 30, 2017: Archives of Virology
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