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viral meningoencephalitis

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https://www.readbyqxmd.com/read/29330273/rheumatoid-disease-an-unusual-cause-of-relapsing-meningoencephalitis
#1
Sian K Alexander, Maria Di Cicco, Ute Pohl, Alberto Cifelli
A 73-year-old man presented with three episodes of dysphasia and disinhibited behaviour, a single seizure and transient ischaemic attack-like events characterised by right arm and/or leg weakness. These episodes were separated by month-long asymptomatic intervals. Medical history included rheumatoid arthritis, which was clinically quiescent on leflunomide.Repeated cerebrospinal fluid examination showed a persistent lymphocytosis with mildly reduced glucose and elevated protein; oligoclonal bands and viral PCR were negative...
January 12, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29327203/loss-of-cx43-mediated-functional-gap-junction-communication-in-meningeal-fibroblasts-following-mouse-hepatitis-virus-infection
#2
Abhishek Bose, Rahul Basu, Mahua Maulik, Jayasri Das Sarma
Mouse hepatitis virus (MHV) infection causes meningoencephalitis by disrupting the neuro-glial and glial-pial homeostasis. Recent studies suggest that MHV infection alters gap junction protein connexin 43 (Cx43)-mediated intercellular communication in brain and primary cultured astrocytes. In addition to astrocytes, meningeal fibroblasts also express high levels of Cx43. Fibroblasts in the meninges together with the basal lamina and the astrocyte endfeet forms the glial limitans superficialis as part of the blood-brain barrier (BBB)...
January 11, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29250449/short-lasting-unilateral-neuralgiform-headache-attacks-with-conjunctival-injection-and-tearing-in-a-patient-with-varicella-zoster-virus-encephalomyelitis
#3
Megan E Gray, Brian Wispelwey, Christopher J Arnold
Short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing syndrome (SUNCT) is a type of trigeminal autonomic cephalalgia. Its etiology is generally idiopathic, though rarely it has been associated with viral infections. We describe the fourth case reported in the literature of SUNCT in association with viral meningoencephalitis.
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/29197841/haemorrhagic-conversion-of-infectious-myelitis-in-an-immunocompromised-patient
#4
Michael Stephen Pohlen, Jonathan Sunwei Lin, Kevin Yuqi Wang, Mohammad Ghasemi-Rad, Christie M Lincoln
A 28-year-old man recently diagnosed with HIV (CD4 19 cells/mm3, viral load 3.6 million copies/mL, not on highly active antiretroviral therapy on initial diagnosis at outside hospital), disseminated histoplasmosis, shingles and syphilis presented with paraplegia developing over 3 days. Spine MRI demonstrated a longitudinally extensive cord lesion extending from C3 to the tip of the conus. Brain MRI was consistent with meningoencephalitis. Cerebrospinal fluid findings were notable for positive varicella zoster virus (VZV) and cytomegalovirus (CMV) PCRs as well as a Venereal Disease Research Laboratory titre of 1:2...
December 2, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29185462/histopathological-immunohistochemical-and-ultrastructural-evidence-of-spontaneous-senecavirus-a-induced-lesions-at-the-choroid-plexus-of-newborn-piglets
#5
Thalita E S Oliveira, Mariana M Z Michelazzo, Thiago Fernandes, Admilton G de Oliveira, Raquel A Leme, Alice F Alfieri, Amauri A Alfieri, Selwyn A Headley
Epidemic Transient Neonatal Losses (ETNL) is a disease of piglets caused by Senecavirus A (SVA) in which the method of dissemination and associated lesions are not well-defined. This study investigated the possible SVA-induced lesions by examining spontaneous infections in newborn piglets. Histopathology revealed ballooning degeneration of transitional epithelium, nonsuppurative meningoencephalitis, plexus choroiditis, and atrophic enteritis. RT-PCR identified SVA in all tissues evaluated and sequencing confirmed these results...
November 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29167335/%C3%AE-d-n-4-hydroxycytidine-is-a-potent-anti-alphavirus-compound-that-induces-high-level-of-mutations-in-viral-genome
#6
Nadya Urakova, Valeriya Kuznetsova, David K Crossman, Arpine Sokratian, David B Guthrie, Alexander A Kolykhalov, Mark A Lockwood, Michael G Natchus, Michael R Crowley, George R Painter, Elena I Frolova, Ilya Frolov
Venezuelan equine encephalitis virus (VEEV) is a representative member of the New World alphaviruses. It is transmitted by mosquito vectors and causes highly debilitating disease in humans, equides and other vertebrate hosts. Despite a continuous public health threat, very few compounds with anti-VEEV activity in cell culture and in mouse models have been identified to date, and rapid development of virus resistance to some of them has been recorded. In this study, we investigated the possibility of using a modified nucleoside analog, β-D-N(4)-hydroxycytidine (NHC), as an anti-VEEV agent and defined the mechanism of its anti-VEEV activity...
November 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29158604/antiviral-cd8-t-cells-induce-zika-virus-associated-paralysis-in-mice
#7
Kellie A Jurado, Laura J Yockey, Patrick W Wong, Sarah Lee, Anita J Huttner, Akiko Iwasaki
Zika virus (ZIKV) is an emerging, mosquito-borne RNA virus. The rapid spread of ZIKV within the Americas has unveiled microcephaly 1 and Guillain-Barré syndrome 2,3 as ZIKV-associated neurological complications. Recent reports have also indicated other neurological manifestations to be associated with ZIKV, including myelitis 4 , meningoencephalitis 5 and fatal encephalitis 6 . Here, we investigate the neuropathogenesis of ZIKV infection in type I interferon receptor IFNAR knockout (Ifnar1 -/- ) mice, an infection model that exhibits high viral burden within the central nervous system...
November 20, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/29118127/peripheral-blood-biomarkers-of-disease-outcome-in-a-monkey-model-of-rift-valley-fever-encephalitis
#8
Elizabeth R Wonderlich, Amy L Caroline, Cynthia M McMillen, Aaron W Walters, Douglas S Reed, Simon M Barratt-Boyes, Amy L Hartman
Rift Valley Fever (RVF) is an emerging arboviral disease of livestock and people. Although a mosquito-borne virus, humans are infected through contact with or inhalation of virus-laden particles from contaminated animal carcasses. Some individuals infected with RVF virus (RVFV) develop meningoencephalitis resulting in morbidity and mortality. Little is known about the pathogenic mechanisms that lead to neurologic sequelae, and thus animal models that represent human disease are needed. African green monkeys (AGM) exposed to aerosols containing RVFV develop a reproducibly lethal neurological disease that resembles human illness...
November 8, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29108750/new-spectrum-of-the-neurologic-consequences-of-zika
#9
EDITORIAL
Marco T Medina, Marco Medina-Montoya
Zika virus infection represents a new neuropathological agent with association to a wide spectrum of neurological complications: a) Congenital Zika Syndrome by affecting the neural stem cells of the human fetal brain; b) Guillain-Barré Syndrome by an autoimmune response against peripheral myelin and/or axonal components or probable direct inflammatory reaction; c) Encephalitis/meningoencephalitis and myelitis by a direct viral inflammatory process on the central nervous system; d) Sensory neuropathy by infecting directly the peripheral neurons and causing substantial cell death and pathogenic transcriptional dysregulation; e) Acute Disseminated Encephalomyelitis and optic neuropathy; f) Seizures and Epilepsy and g) childhood arterial ischemic stroke by probable inflammatory reaction and endothelial injury...
December 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/29022865/toscana-virus-cap-snatching-and-initiation-of-transcription
#10
Abdennour Amroun, Stéphane Priet, Gilles Querat
Toscana virus (TOSV) is an arthropod-borne phlebovirus within the family Phenuiviridae in the order Bunyavirales. It seems to be an important agent of human meningoencephalitis in the warm season in the Mediterranean area. Because the polymerase of Bunyavirales lacks a capping activity, it cleaves short-capped RNA leaders derived from the host cell, and uses them to initiate viral mRNA synthesis. To determine the size and nucleotide composition of the host-derived RNA leaders, and to elucidate the first steps of TOSV transcription initiation, we performed a high-throughput sequencing of the 5' end of TOSV mRNAs in infected cells at different times post-infection...
October 12, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28969235/super-refractory-status-epilepticus-a-therapeutic-challenge-in-paediatrics
#11
Shrikiran Aroor, Kanaparthi Shravan, Suneel C Mundkur, C Jayakrishnan, Sai Sripad Rao
A status epilepticus which persists for 24 hours or more after starting treatment with anaesthesia or has recurred inspite of general anaesthesia is known as Super-Refractory Status Epilepticus (SRSE). It includes cases where status epilepticus recurs on reduction or withdrawal of anaesthesia. SRSE, though infrequently seen, constitutes a medical emergency due to the associated high morbidity and mortality. No clear cut guidelines are available till date for the management of SRSE. Most of the published literature was case reports and expert opinion...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28942490/susceptibility-of-mice-to-bovine-herpesvirus-type-5-infection-in-the-central-nervous-system
#12
L P Mesquita, R C Costa, M M Fusuma, F R P Bruhn, E Mori, E M Pituco, C M C Mori, R Weiblen, P C Maiorka
Bovine herpesvirus type 5 (BoHV-5) is an important pathogen that causes meningoencephalitis in cattle. Few studies have used the mouse as a model for BoHV-5 infection. Despite the fact that BoHV-5 can infect mice with immune deficiencies, little is known about viral replication, immune response, and the course of infection in the central nervous system (CNS) of wild-type mice. Therefore, the aim of this study was to evaluate the response in the CNS of BALB/c mice acutely infected with BoHV-5 at different days post-inoculation (dpi)...
December 2017: Veterinary Research Communications
https://www.readbyqxmd.com/read/28873445/deleterious-effect-of-usutu-virus-on-human-neural-cells
#13
Sara Salinas, Orianne Constant, Caroline Desmetz, Jonathan Barthelemy, Jean-Marc Lemaitre, Ollivier Milhavet, Nicolas Nagot, Vincent Foulongne, Florence E Perrin, Juan-Carlos Saiz, Sylvie Lecollinet, Philippe Van de Perre, Yannick Simonin
In the last decade, the number of emerging Flaviviruses described worldwide has increased considerably. Among them Zika virus (ZIKV) and Usutu virus (USUV) are African mosquito-borne viruses that recently emerged. Recently, ZIKV has been intensely studied due to major outbreaks associated with neonatal death and birth defects, as well as neurological symptoms. USUV pathogenesis remains largely unexplored, despite significant human and veterinary associated disorders. Circulation of USUV in Africa was documented more than 50 years ago, and it emerged in Europe two decades ago, causing massive bird mortality...
September 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28854990/the-uniform-cortex-sign-a-diagnostic-sign-of-diffuse-cortical-injury-on-mr-imaging-of-the-brain-at-1-5-t
#14
Andrew Leung, Apurva Patel, Basem Bahakeem, David Pelz, Donald Lee, Manas Sharma
BACKGROUND: To introduce the "uniform cortex sign" (UCS) and evaluate its performance as a diagnostic test for the presence of diffuse cortical injury (DCI). METHODS: The study was approved by our institutional review board. Three experienced neuroradiologists were given a tutorial on the UCS. They were subsequently presented with 14 cases (7 control patients and 7 DCI patients with the UCS) in random order and asked to determine whether the UCS was present. Each case consisted of selected DWI, T2-weighted, and FLAIR images from unenhanced 1...
August 31, 2017: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/28831740/expression-of-mir-155-associated-with-toll-like-receptors-3-7-and-9-transcription-in-the-olfactory-bulbs-of-cattle-naturally-infected-with-bhv5
#15
Bruna R S M Oliveira, Flavia V Vieira, Dielson de S Vieira, Sergio E L da Silva, Roberto Gameiro, Eduardo F Flores, Tereza C Cardoso
Bovine herpesvirus 5 (BHV5) infection of young cattle is frequently associated with fatal neurological disease and, as such, represents an attractive model for studying the pathogenesis of viral-induced meningoencephalitis. Following replication in the nasal mucosa, BHV5 invades the central nervous system (CNS) mainly through the olfactory pathway. The innate immune response triggered by the host face to virus replication through the olfactory route is poorly understood. Recently, an upregulation of conserved pathogen-associated molecular pattern, as Toll-like receptors (TLRs), has been demonstrated in the CNS of BHV5 experimentally infected cows...
October 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28830430/tick-borne-encephalitis-in-a-naturally-infected-sheep
#16
Brigitte Böhm, Benjamin Schade, Benjamin Bauer, Bernd Hoffmann, Donata Hoffmann, Ute Ziegler, Martin Beer, Christine Klaus, Herbert Weissenböck, Jens Böttcher
BACKGROUND: Tick-borne encephalitis (TBE) is the most important viral tick borne zoonosis in Europe. In Germany, about 250 human cases are registered annually, with the highest incidence reported in the last years coming from the federal states Bavaria and Baden-Wuerttemberg. In veterinary medicine, only sporadic cases in wild and domestic animals have been reported; however, a high number of wild and domestic animals have tested positive for the tick-borne encephalitis virus (TBEV) antibody...
August 22, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28804111/an-adult-case-of-group-a-streptococcus-meningitis-associated-with-steroid-responsive-meningoencephalitis
#17
Koji Shimozono, Yoshiko Hayashi, Tokuji Nishinaka, Sayaka Kobayashi
A previously healthy 80-year-old woman presented to our service in a comatose state. On examination the patient had fever and neck stiffness. Laboratory investigation showed polymorphonuclear pleocytosis in cerebro-spinal fluid (CSF). These findings prompted us to a diagnosis of bacterial or viral meningitis and combination therapy consisting of ceftriaxone, vancomycin and acyclovir was started immediately. Two days later, culture of blood yielded Streptococcus pyogenes (group A streptococcus; GAS). The antibiotic therapy was converted to intravenous ampicillin for 14 days...
September 30, 2017: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/28762591/ean-consensus-review-on-prevention-diagnosis-and-management-of-tick-borne-encephalitis
#18
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...
October 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28718069/neurological-involvement-in-patients-with-acute-recent-hiv-1-infection-a-case-control-study
#19
Juan Ambrosioni, Francisca Artigues, David Nicolás, Judit Peñafiel, Fernando Agüero, Christian Manzardo, María Mar Mosquera, Sonsoles Sánchez-Palomino, Elisa De Lazzari, María A Marcos, Montserrat Plana, José M Miró
Primary HIV-1 infection is a relevant period for its virological and epidemiological consequences. Most patients present a symptomatic disease that can be potentially serious, but neurological involvement during primary HIV-1 infection has been poorly studied. The aim of this study was to describe the characteristics and outcomes of primary HIV-1 infection patients presenting neurological symptoms and to compare them with primary HIV-1 infection patients without neurological involvement. Retrospective case-control study (1:3) comparing primary HIV-1 infection patients with and without neurological involvement enrolled in the Acute/Recent Hospital Clinic PHI Cohort between 1997 and 2016...
October 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28700057/neurological-manifestations-of-dengue-in-central-brazil
#20
Marianna Peres Tassara, Adriana Oliveira Guilarde, Benigno Alberto Moraes da Rocha, Valéria Christina de Rezende Féres, Celina Maria Turchi Martelli
INTRODUCTION: The incidence of dengue has increased throughout the 2000s with a consequent global increase in atypical clinical forms. METHODS: This study reports a series of cases of neurological dengue out of 498 confirmed cases of laboratory dengue in Goiânia, Brazil. Cases were confirmed based on viral RNA detection via polymerase chain reaction or IgM antibody capture. RESULTS: Neurological symptoms occurred in 5.6% of cases, including paresthesia (3...
May 2017: Revista da Sociedade Brasileira de Medicina Tropical
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