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Herpes encephalitis

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https://www.readbyqxmd.com/read/28329667/serious-infections-are-on-the-rise-in-us-inpatients-with-psoriasis
#1
Derek Y Hsu
Psoriasis is a chronic inflammatory skin disorder associated with immune dysregulation and use of systemic immunosuppressive treatments that may predispose toward serious infections. We sought to determine the rates of serious infections in hospitalized patients with psoriasis. We analyzed data from the 2002-2012 Nationwide Inpatient Sample, containing a 20% sample of all US hospitalizations. Psoriasis was determined by a validated algorithm using ICD-9-CM codes. In multivariate logistic regression models adjusting for socio-demographics, psoriasis was associated with multiple serious infections, including methicillin-resistant Staphylococcus aureus (odds ratio [95% confidence intervals] 1...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28320320/antiviral-activity-of-pha767491-against-human-herpes-simplex-virus-in-vitro-and-in-vivo
#2
Jue Hou, Zili Zhang, Qiang Huang, Jun Yan, Xiaohu Zhang, Xiaoliang Yu, Guihua Tan, Chunfu Zheng, Feng Xu, Sudan He
BACKGROUND: Herpes simplex virus (HSV) is a common human pathogen that causes a variety of diseases, including oral-labial, genital lesions and life-threatening encephalitis. The antiviral nucleoside analogues such as acyclovir are currently used in anti-HSV therapies; however, clinical overuse of these drugs has led to the emergence of drug-resistant viral strains. Hence, there is an urgent need to develop new anti-HSV agents. METHODS: To identify novel anti-HSV-1 compounds, we screened the LOPAC small scale library of 1280 bioactive compounds to identify inhibitors of HSV-1-induced necroptosis...
March 20, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28302316/defining-nervous-system-susceptibility-during-acute-and-latent-herpes-simplex-virus-1-infection
#3
REVIEW
Chandra M Menendez, Daniel J J Carr
Herpes simplex viruses are neurotropic human pathogens that infect and establish latency in peripheral sensory neurons of the host. Herpes Simplex Virus-1 (HSV-1) readily infects the facial mucosa that can result in the establishment of a latent infection in the sensory neurons of the trigeminal ganglia (TG). From latency, HSV-1 can reactivate and cause peripheral pathology following anterograde trafficking from sensory neurons. Under rare circumstances, HSV-1 can migrate into the central nervous system (CNS) and cause Herpes Simplex Encephalitis (HSE), a devastating disease of the CNS...
March 8, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28298450/cost-effectiveness-study-of-criteria-to-screen-herpes-simplex-pcr-tests-from-cerebrospinal-fluid
#4
Ronald G Hauser, Sheldon M Campbell, Cynthia A Brandt, Shiyi Wang
Background: The absence of markers of inflammation in the cerebrospinal fluid (CSF) commonly predict the absence of herpes simplex virus (HSV) central nervous system (CNS) infection. Consequently, multiple authors have proposed and validated criteria to defer HSV PCR tests from CSF in immune competent hosts with normal CSF white cells and protein (≤5 cells/mm(3), ≤50 mg/dL, respectively). Immune competence equates to age ≥2 years without HIV or transplant. Adoption of the criteria may erroneously exclude HSV infected persons from a necessary diagnostic test, or alternatively, reduce the costs associated with HSV tests with minimal to no effect on patient care...
March 15, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28291542/molecular-mechanisms-of-neuroinflammation-and-injury-during-acute-viral-encephalitis
#5
REVIEW
Katherine D Shives, Kenneth L Tyler, J David Beckham
Viral infections in the central nervous system are a major cause of encephalitis. West Nile virus (WNV) and Herpes simplex virus (HSV) are the most common causes of viral encephalitis in the United States. We review the role of neuroinflammation in the pathogenesis of WNV and HSV infections in the central nervous system (CNS). We discuss the role of the innate and cell-mediated immune responses in peripheral control of viral infection, viral invasion of the CNS, and in inflammatory-mediated neuronal injury...
March 11, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28278385/the-type-i-interferon-response-and-age-dependent-susceptibility-to-herpes-simplex-virus-infection
#6
Daniel Giraldo, Douglas R Wilcox, Richard Longnecker
Herpes simplex virus type 1 (HSV-1) is a highly prevalent human neurotropic pathogen. HSV-1 infection is associated with a variety of diseases ranging from benign orolabial lesions to more serious and even life-threatening conditions such as herpes simplex keratitis and herpes simplex encephalitis (HSE). HSE is a rare occurrence among healthy adult individuals, but newborns are a particularly susceptible population. Type I IFN signaling has been identified as a crucial component of the innate immune response to the control of HSV-1 infection...
March 9, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28275080/impact-of-a-rapid-herpes-simplex-virus-pcr-assay-on-duration-of-acyclovir-therapy
#7
Tam T Van, Kanokporn Mongkolrattanothai, Melissa Arevalo, Maryann Lustestica, Jennifer Dien Bard
Herpes simplex virus (HSV) infection of the central nervous system (CNS) is associated with significant morbidity and mortality in children. This study assessed the impact of a direct HSV (dHSV) PCR assay on time to result and duration of acyclovir therapy in children with signs and symptoms of meningitis and encephalitis. A total of 363 patients with HSV PCR on CSF were included in this retrospective analysis, divided into the pre- and post-implementation groups. The pre-implementation arm included CSF testing performed using a laboratory-developed real-time PCR assay and the post-implementation group consisted of CSF samples tested using a direct sample-to-answer assay...
March 8, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28261514/psychosis-in-a-15-year-old-female-with-herpes-simplex-encephalitis-in-a-background-of-mannose-binding-lecithin-deficiency
#8
Kenneth Asogwa, Kwame Buabeng, Amarjit Kaur
Historically, psychotic disorder has been associated with viral infection. Herpes simplex infections and Epstein-Barr virus (EBV) among other viral infections have been implicated in psychotic disorder. Of note in this case report is psychotic disorder that occurred following reactivation of herpes simplex infection in a background of mannose-binding lecithin (MBL) deficiency, childhood EBV infection, and severe psychosocial stress. Herpes simplex encephalitis (HSE) remains a significant cause of morbidity and mortality despite advancement in its treatment with intravenous acyclovir...
2017: Case Reports in Psychiatry
https://www.readbyqxmd.com/read/28259480/do-all-children-who-present-with-a-complex-febrile-seizure-need-a-lumbar-puncture
#9
Romain Guedj, Hélène Chappuy, Luigi Titomanlio, Loic De Pontual, Sandra Biscardi, Gisèle Nissack-Obiketeki, Béatrice Pellegrino, Oussama Charara, François Angoulvant, Julien Denis, Corinne Levy, Robert Cohen, Solène Loschi, Pierre Louis Leger, Ricardo Carbajal
STUDY OBJECTIVE: We assess the prevalences of bacterial meningitis and herpes simplex virus meningoencephalitis (HSV-ME) in children with a complex febrile seizure and determine these prevalences in the subgroup of children with a clinical examination result not suggestive of meningitis or encephalitis. METHODS: This multicenter retrospective study was conducted in 7 pediatric emergency departments (EDs) in the region of Paris, France. Visits of patients aged 6 months to 5 years for a complex febrile seizure from January 2007 to December 2011 were analyzed...
March 1, 2017: Annals of Emergency Medicine
https://www.readbyqxmd.com/read/28251511/herpes-simplex-encephalitis-an-update
#10
REVIEW
John W Gnann, Richard J Whitley
PURPOSE OF REVIEW: The goal of this review is to provide an update on current thinking regarding herpes simplex encephalitis (HSE), emphasizing new information about pathogenesis, diagnosis, and immune responses. Specific questions to be addressed are the following: (1) Is there a genetic predisposition to HSE? (2) What clinical approaches have the greatest impact on improving the long-term outcomes in patients with HSE? And (3) are there immune-mediated mechanisms that may account for relapsing HSE? RECENT FINDINGS: Toll-like receptor 3 (TLR 3) plays an important role in innate immune responses, including generation of interferons...
March 2017: Current Infectious Disease Reports
https://www.readbyqxmd.com/read/28228902/mri-diagnosis-of-herpes-simplex-encephalitis-in-an-elderly-man-with-nonspecific-symptoms
#11
Benjamin J Croll, Zachary M Dillon, Kevin R Weaver, Marna Rayl Greenberg
A 78-year-old male presented to the Emergency Department complaining of a 1-week onset of increasing fatigue and anorexia. The patient was previously well but had a history of depression, chronic diarrhea, and hypertension. His examination was remarkable for mild fever (100.1°F). He had no acute neurologic deficits. The patient felt better after intravenous fluids and was discharged to follow-up with the primary care provider. With no resolution of symptoms and new memory loss, the patient's primary care doctor ordered an MRI which revealed abnormal signal/patchy enhancement of the left temporal lobe indicative (pathognomonic) of herpes simplex encephalitis...
March 2017: Radiology case reports
https://www.readbyqxmd.com/read/28224486/human-herpes-virus-6-encephalitis-causing-severe-anterograde-amnesia-associated-with-rituximab-azathioprine-and-prednisolone-combination-therapy-for-dermatomyositis
#12
Thomas Baumer, Charlie Fry, Sebastian Luppe, Harsha Gunawardena, Kasia Sieradzan
Human herpes virus-6 (HHV-6) reactivation is a well-recognised complication following haematological stem cell transplantation, but it is novel in the context of combination immunomodulatory therapy for autoimmune disease. We report a case of severe anterograde amnesia caused by HHV-6 encephalitis in a young female patient on rituximab, azathioprine and prednisolone for dermatomyositis (DM). The use of targeted biologic treatments for systemic autoimmune connective tissue diseases (CTDs) is increasing, particularly when refractory to conventional management...
February 21, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28224485/incidence-of-varicella-zoster-virus-infections-of-the-central-nervous-system-in-the-elderly-a-large-tertiary-hospital-based-series-2007-2014
#13
M Arruti, L D Piñeiro, Y Salicio, G Cilla, M A Goenaga, A López de Munain
The aim of the study was to describe the clinical and epidemiological characteristics of the central nervous system (CNS) infection by varicella zoster virus (VZV) in patients older than 65 years in a tertiary community hospital. We retrospectively analysed the results of cerebrospinal fluid (CSF) testing in patients older than 65 years between 2007 and 2014 with clinically suspected VZV infection with CNS involvement. Patients whose CSF samples were positive for VZV DNA were included, as were those with negative results who simultaneously presented herpes zoster and CSF or magnetic resonance imaging findings suggestive of CNS infection, and in whom other possible aetiologies had been ruled out...
February 21, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28222752/dendritic-cells-macrophages-nk-and-cd8-t-lymphocytes-play-pivotal-roles-in-controlling-hsv-1-in-the-trigeminal-ganglia-by-producing-il1-beta-inos-and-granzyme-b
#14
Natália Lucinda, Maria Marta Figueiredo, Natália Lima Pessoa, Beatriz Senra Álvares da Silva Santos, Graciela Kunrath Lima, Arthur Molinari Freitas, Alexandre Magalhães Vieira Machado, Erna Geessien Kroon, Lis Ribeiro do Valle Antonelli, Marco Antônio Campos
BACKGROUND: Herpes simplex virus type 1 (HSV-1) cause not only mild symptoms but also blindness and encephalitis. It was previously shown that the immune response against HSV-1 occurs mainly in the trigeminal ganglia (TG) and that Toll-like receptors 2 and 9 (TLR2/9) are important in mediating this response. It was also demonstrated that iNOS (nitric oxide synthase) and interleukin 1 beta (IL-1β) play an essential role in the defense against HSV-1 infection. Importantly, the present work aimed to identify the primary cells responsible for iNOS and IL-1β production and search for other important molecules and cells that might or might not depend on TLR2/9 receptors to mediate the immune response against HSV-1...
February 21, 2017: Virology Journal
https://www.readbyqxmd.com/read/28222132/correction-induction-of-multiple-mir-200-182-members-in-the-brains-of-mice-are-associated-with-acute-herpes-simplex-virus-1-encephalitis
#15
Anna Majer, Kyle A Caligiuri, Kamilla K Gale, Yulian Niu, Clark S Phillipson, Timothy F Booth, Stephanie A Booth
[This corrects the article DOI: 10.1371/journal.pone.0169081.].
2017: PloS One
https://www.readbyqxmd.com/read/28202703/investigations-in-gabaa-receptor-antibody-associated-encephalitis
#16
Marianna Spatola, Mar Petit-Pedrol, Mateus Mistieri Simabukuro, Thaís Armangue, Fernanda J Castro, Maria I Barcelo Artigues, Maria R Julià Benique, Leslie Benson, Mark Gorman, Ana Felipe, Ruben L Caparó Oblitas, Myrna R Rosenfeld, Francesc Graus, Josep Dalmau
OBJECTIVE: To report the clinical features, comorbidities, receptor subunit targets, and outcome in patients with anti-GABAA receptor (GABAAR) encephalitis. METHODS: Clinical study of 26 patients, including 17 new (April 2013-January 2016) and 9 previously reported patients. Antibodies to α1, β3, and γ2 subunits of the GABAAR were determined using reported techniques. RESULTS: Patients' median age was 40.5 years (interquartile range 48...
March 14, 2017: Neurology
https://www.readbyqxmd.com/read/28201953/acute-hiv-1-infection-presenting-with-fulminant-encephalopathy
#17
Eun J Lee, Young H Kim, Jeong Y Lee, Jun-Sang Sunwoo, Se Y Park, Tae H Kim
Human immunodeficiency virus (HIV)-1 directly affects the nervous system, causes distinct neurological symptoms, and indirectly results in opportunistic infections, which include herpes virus simplex (HSV)-1, HSV-2, varicella zoster virus, and cytomegalovirus encephalitis caused by immunodeficiency. Early HIV-1 invasion of the central nervous system is also possible, and acute encephalopathy is a potentially lethal complication. We encountered a case of fulminant encephalopathy as a primary presentation of acute HIV-1 infection, in which highly active antiretroviral treatment resulted in a full clinical recovery...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/28192386/spectrum-of-magnetic-resonance-imaging-features-in-unilateral-optic-tract-dysfunction
#18
Kristopher M Kowal, Francisco F Rivas Rodriguez, Ashok Srinivasan, Jonathan D Trobe
BACKGROUND: Optic tract dysfunction may be the predominant or only clinical manifestation of an intracranial disorder including mass legion, ischemic infarct, inflammatory disease, and trauma. Documentation of the neuroimaging features of these lesions is limited to reports mostly published before the availability of MRI. This study was undertaken to document the spectrum of MRI features in patients presenting with optic tract dysfunction. METHODS: A retrospective study from 2004 to 2015 at a single tertiary care neuro-ophthalmology service of 24 patients who had unilateral optic tract dysfunction defined by a homonymous hemianopia and a relative afferent pupil defect that could not be attributed to optic neuropathy or retinopathy...
March 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28191384/delayed-temporal-lobe-hemorrhage-after-initiation-of-acyclovir-in-an-immunocompetent-patient-with-herpes-simplex-virus-2-encephalitis-a-case-report
#19
Kyle Mueller, Joshua E Ryan, Alex Tai, Rocco A Armonda
Herpes simplex virus (HSV) is the most common cause of non-epidemic, sporadic, acute focal encephalitis in the United States. Inflammation of the vasculature makes them friable and susceptible to hemorrhage. Massive hemorrhage, though rare, can present in a delayed fashion after initiation of acyclovir and often requires surgical intervention. We report a unique case of delayed temporal lobe hemorrhage after initiation of acyclovir in an immunocompetent patient, specifically for its presentation, virology, and surgical management...
January 15, 2017: Curēus
https://www.readbyqxmd.com/read/28187808/diagnosis-and-management-of-acute-encephalitis
#20
REVIEW
J J Halperin
Encephalitis is typically viral (approximately half of diagnosed cases) or autoimmune (about a quarter) with the remainder remaining undiagnosable at this time. All require general supportive care but only a minority requires intensive care admission - in these intubation, to protect the airway or to treat status epilepticus with anesthetic drugs, may be needed. In some dysautonomia with wide blood pressure fluctuations is the principal concern. Remarkably, in addition to supportive care, specific treatment options are available for the majority - immune-modulating therapy for those with autoimmune disorders, antiviral therapy for herpes simplex 1 and 2, and varicella-zoster encephalitis...
2017: Handbook of Clinical Neurology
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