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https://www.readbyqxmd.com/read/29345964/immune-response-to-dengue-and-zika
#1
Annie Elong Ngono, Sujan Shresta
Flaviviruses such as dengue (DENV), yellow fever (YFV), West Nile (WNV), and Zika (ZIKV) are human pathogens of global significance. In particular, DENV causes the most prevalent mosquito-borne viral diseases in humans, and ZIKV emerged from obscurity into the spotlight in 2016 as the etiologic agent of congenital Zika syndrome. Owing to the recent emergence of ZIKV as a global pandemic threat, the roles of the immune system during ZIKV infections are as yet unclear. In contrast, decades of DENV research implicate a dual role for the immune system in protection against and pathogenesis of DENV infection...
January 18, 2018: Annual Review of Immunology
https://www.readbyqxmd.com/read/29330423/t-cell-immunity-to-zika-virus-targets-immunodominant-epitopes-that-show-cross-reactivity-with-other-flaviviruses
#2
C J Reynolds, O M Suleyman, A M Ortega-Prieto, J K Skelton, P Bonnesoeur, A Blohm, V Carregaro, J S Silva, E A James, B Maillère, M Dorner, R J Boyton, D M Altmann
Zika virus (ZIKV) Infection has several outcomes from asymptomatic exposure to rash, conjunctivitis, Guillain-Barré syndrome or congenital Zika syndrome. Analysis of ZIKV immunity is confounded by the fact that several related Flaviviruses infect humans, including Dengue virus 1-4, West Nile virus and Yellow Fever virus. HLA class II restricted T cell cross-reactivity between ZIKV and other Flaviviruses infection(s) or vaccination may contribute to protection or to enhanced immunopathology. We mapped immunodominant, HLA class II restricted, CD4 epitopes from ZIKV Envelope (Env), and Non-structural (NS) NS1, NS3 and NS5 antigens in HLA class II transgenic mice...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29327375/impact-of-hiv-aids-epidemic-on-human-capital-development-in-west-africa
#3
Rasaki Stephen Dauda
West Africa occupies the third position with respect to the burden of human immunodeficiency virus/acquired immune deficiency syndrome (HIV/AIDS) globally, after Southern and East Africa. About 5 million adults and children are infected with the disease in the subregion, while HIV prevalence in the general population hovers around 2% and 5%. This paper attempts to investigate the impact of HIV/AIDS epidemic on human capital development in 11 West African countries over the period 1990 to 2011. The study used a dynamic panel data modeling approach, using first difference, difference generalized methods of moment, and system generalized methods of moment estimating techniques...
January 12, 2018: International Journal of Health Planning and Management
https://www.readbyqxmd.com/read/29325332/-gender-differences-of-rem-related-obstructive-sleep-apnea-hypopnea-syndrome
#4
M Xie, R Ren, J M He, X F Xue, T M Li, L Tan, F Lei, X D Tang, L H Yang
Objective: To explore the gender differences of rapid-eye-movement (REM) related obstructive sleep apnea-hypopnea syndrome (OSAHS). Methods: Consecutive patients with primary complaint of snoring from Sleep Medicine Center of West China Hospital between January 2016 and November 2016 were included in the study. All participants underwent one night polysomnography (PSG) and Epworth sleep scale (ESS) was estimated. The patients diagnosed with OSAHS were classified as REM related OSAHS (REM-OSAHS group) and non-rapid-eye-movement (NREM) related OSAHS (NREM-OSAHS group) based on the PSG parameters...
December 26, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29323278/structural-biology-of-zika-virus-and-other-flaviviruses
#5
REVIEW
S Saif Hasan, Madhumati Sevvana, Richard J Kuhn, Michael G Rossmann
Zika virus (ZIKV) is an enveloped, icosahedral flavivirus that has structural and functional similarities to other human flavivirus pathogens such as dengue (DENV), West Nile (WNV) and Japanese encephalitis (JEV) viruses. ZIKV infections have been linked to fetal microcephaly and the paralytic Guillain-Barré syndrome. This review provides a comparative structural analysis of the assembly, maturation and host-cell entry of ZIKV with other flaviviruses, especially DENV. We also discuss the mechanisms of neutralization by antibodies...
January 2018: Nature Structural & Molecular Biology
https://www.readbyqxmd.com/read/29321308/sustained-specific-and-cross-reactive-t-cell-responses-to-zika-and-dengue-viruses-ns3-in-west-africa
#6
Bobby Brooke Herrera, Wen-Yang Tsai, Charlotte A Chang, Donald J Hamel, Wei-Kung Wang, Yichen Lu, Souleymane Mboup, Phyllis J Kanki
Recent studies on the role of T cells in Zika virus (ZIKV) infection have shown that T cell responses to Asian ZIKV infection are important for protection, and that previous Dengue virus (DENV) exposure amplifies the protective T cell response to Asian ZIKV. Human T cell responses to African ZIKV infection, however, remain unexplored. Here, we utilized the modified anthrax toxin delivery system to develop a flavivirus ELISPOT. Using human ZIKV and DENV samples from Senegal, West Africa, our results demonstrate specific and cross-reactive T cell responses to nonstructural protein 3 (NS3)...
January 10, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29316973/kartagener-s-syndrome-a-case-report
#7
Abilo Tadesse, Hailemariam Alemu, Mezgebu Silamsaw, Yonathan Gebrewold
BACKGROUND: Kartagener's syndrome is a subset of primary ciliary dyskinesia, an autosomal recessive inherited disorder characterized by the clinical triad of chronic sinusitis, bronchiectasis, and situs inversus. Abnormal ciliary structure or function leading to impaired ciliary motility is the main pathophysiologic problem in Kartagener's syndrome. CASE PRESENTATION: A 24-year-old man from Gondar town, North-West Ethiopia, presented to University of Gondar Hospital with recurrent episodes of nasal congestion with itching and paranasal discomfort, and productive cough for more than a decade...
January 10, 2018: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29315514/cytotoxic-edema-at-onset-in-west-syndrome-of-unknown-etiology-a-longitudinal-diffusion-tensor-imaging-study
#8
Chikako Ogawa, Hiroyuki Kidokoro, Tatsuya Fukasawa, Hiroyuki Yamamoto, Naoko Ishihara, Yuji Ito, Yoko Sakaguchi, Yu Okai, Atsuko Ohno, Tomohiko Nakata, Yoshiteru Azuma, Ayako Hattori, Tetsuo Kubota, Takeshi Tsuji, Akihiro Hirakawa, Hisashi Kawai, Jun Natsume
OBJECTIVE: To clarify longitudinal changes in white matter microstructures from the onset of disease in patients with West syndrome (WS) of unknown etiology. METHODS: Diffusion tensor imaging (DTI) was prospectively performed at onset and at 12 and 24 months old in 17 children with WS of unknown etiology. DTI was analyzed using tract-based spatial statistics (TBSS) and tract-specific analysis (TSA) of 13 fiber tracts, and fractional anisotropy (FA) and mean diffusivity (MD) were compared with those of 42 age-matched controls...
January 8, 2018: Epilepsia
https://www.readbyqxmd.com/read/29314583/novel-mutations-and-phenotypes-of-epilepsy-associated-genes-in-epileptic-encephalopathies
#9
Peng Zhou, Na He, Jing-Wen Zhang, Zhi-Jian Lin, Jie Wang, Li-Min Yan, Heng Meng, Bin Tang, Bing-Mei Li, Xiao-Rong Liu, Yi-Wu Shi, Qiong-Xiang Zhai, Yong-Hong Yi, Wei-Ping Liao
Epileptic encephalopathies are severe epilepsy disorders with strong genetic bases. We performed targeted next-generation sequencing in 70 patients with epileptic encephalopathies. The likely pathogenicity of variants in candidate genes was evaluated by American College of Medical Genetics and Genomics (ACMG) scoring taken together with the accepted clinical presentation. Thirty-three candidate variants were detected after population filtration and computational prediction. According to ACMG, 21 candidate variants, including 18 de novo variants, were assessed to be pathogenic/likely pathogenic with clinical concordance...
January 4, 2018: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/29313508/evaluation-of-transfusion-practices-in-sickle-cell-disease-in-senegal-cohort-study-of-1078-patients-with-sickle-cell-disease
#10
M Seck, A Tall, B F Faye, D Sy Bah, Y Guéye, A Sall, A O Touré, S Diop
Blood transfusion is an essential therapeutic tool in the treatment of sickle cell disease. Its indications and modalities vary from one country to another as a function of the clinical severity of the disease and the availability of blood products. This study seeks to evaluate the frequency and modalities of blood transfusions as well as their indications in patients with sickle cell syndrome at the Dakar hematology department from 1995 through 2015. This retrospective study reviewed the records of a cohort of 1078 patients with SS, SC, Sβ0 and Sβ + thalassemia sickle cell syndromes and collected data about the type of blood products, indications, modalities, and acute transfusion complications...
November 1, 2017: Médecine et Santé Tropicales
https://www.readbyqxmd.com/read/29305277/amplification-of-perceived-risk-among-users-of-a-national-travel-health-web-site-during-the-2013-2016-west-african-ebola-virus-outbreak
#11
Jakob Petersen, Hilary Simons, Dipti Patel
Timely outbreak information was paramount to public health bodies issuing travel advisories during the 2013-2016 West Africa Ebola virus outbreak. This article explores the potential for a syndromic system/Shewhart control chart based on the online interaction with a national travel health Web site in comparison with searches on the Google UK search engine. The study showed an amplification of perceived risk among users of a national travel health Web site months before the World Health Organization declared the outbreak a Public Health Emergency of International Concern and the initial surge in public interest on Google UK in August 2014...
January 2, 2018: American Journal of Infection Control
https://www.readbyqxmd.com/read/29287185/insufficient-efficacy-of-vagus-nerve-stimulation-for-epileptic-spasms-and-tonic-spasms-in-children-with-refractory-epilepsy
#12
Tohru Okanishi, Ayataka Fujimoto, Mitsuyo Nishimura, Sotaro Kanai, Hirotaka Motoi, Yoichiro Homma, Hideo Enoki
BACKGROUND: Vagus nerve stimulation (VNS) leads to palliation of refractory seizures. Epileptic spasms (ES) and tonic spasms (TS) appear in children with West syndrome and symptomatic generalized epilepsy. Both types of spasms are often characterized by truncal muscular contractions and ictal electroencephalography (EEG) findings comprising the contiguous phases: phase 1) 15-20 Hz, spindle-like fast activity (occur in 70%), 2) diffuse polyphasic δ/θ waves (100%), and 3) electrodecremental activity (70%)...
December 15, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/29287070/a-diagnostic-and-epidemiologic-investigation-of-acute-febrile-illness-afi-in-kilombero-tanzania
#13
Christine Hercik, Leonard Cosmas, Ondari D Mogeni, Newton Wamola, Wanze Kohi, Victor Omballa, Melvin Ochieng, Shirley Lidechi, Juma Bonventure, Caroline Ochieng, Clayton Onyango, Barry S Fields, Sayoki Mfinanga, Joel M Montgomery
INTRODUCTION: In low-resource settings, empiric case management of febrile illness is routine as a result of limited access to laboratory diagnostics. The use of comprehensive fever syndromic surveillance, with enhanced clinical microbiology, advanced diagnostics and more robust epidemiologic investigation, could enable healthcare providers to offer a differential diagnosis of fever syndrome and more appropriate care and treatment. METHODS: We conducted a year-long exploratory study of fever syndrome among patients ≥ 1 year if age, presenting to clinical settings with an axillary temperature of ≥37...
2017: PloS One
https://www.readbyqxmd.com/read/29273442/pharmaceutical-interactions-between-antiretroviral-and-antimalarial-drugs-used-in-chemoprophylaxis
#14
REVIEW
Andreas Erich Zautner, Ottmar Herchenröder, Awatef El Moussi, Norbert Georg Schwarz, Dorothea Franziska Wiemer, Uwe Groß, Hagen Frickmann
Human immunodeficiency virus (HIV) is the causative agent of the Acquired Immunodeficiency Syndrome (AIDS). The pandemic is believed to have originated within the Northern Congo basin covering large parts of the Democratic Republic of Congo, the Republic of Congo, the Central African Republic, Cameroon and Gabon. Although over decades, HIV-1 has spread throughout the World leaving no country unaffected, sub-Saharan Africa remains the region with more than 80% of all infected individuals. The HIV-2 epidemic has largely remained restricted to West Africa along the Upper Guinean forests...
December 19, 2017: Acta Tropica
https://www.readbyqxmd.com/read/29233152/hyperuricemia-and-metabolic-syndrome-in-type-2-diabetes-mellitus-patients-at-hawassa-university-comprehensive-specialized-hospital-south-west-ethiopia
#15
Shiferaw Bekele Woyesa, Agete Tadewose Hirigo, Temesgen Bizuayehu Wube
BACKGROUND: Metabolic syndrome is a cluster of the most dangerous heart attack risk factors such as diabetes and prediabetes, abdominal obesity, high cholesterol and high blood pressure. Hyperuricemia is a condition in which the serum uric acid concentration is greater than 5.5 mg per deciliter for child and greater than 7.2 and 6.0 mg per deciliters for male and female adults respectively. METHODS: A cross-sectional study was conducted to determine the magnitude of hyperuricemia and associated factors among type 2 diabetes mellitus patients at Hawassa Comprehensive Specialized Hospital (HCSH) from February 28 to May 30 /2017...
December 12, 2017: BMC Endocrine Disorders
https://www.readbyqxmd.com/read/29227268/characteristics-of-west-syndrome-in-georgia-preliminary-results-of-the-prospective-study
#16
A Kvernadze, N Tatishvili, T Kipiani, G Lomidze
West syndrome hasn't been thoroughly investigated in Georgia. The purposes of our study were a) to assess the clinical and etiological peculiarities of West syndrome, based on MRI data and its relation to the long-term outcome; b) to assess the evolution of West syndrome and its relation to patient characteristics; c) to compare the efficacies of treatments with ACTH and antiepileptic drugs (AEDs); d) to evaluate the neuropsychological outcome after 12 and 24 months and their early predictors. We evaluated 31 patients (17 male, 14 female) with infantile spasms...
November 2017: Georgian Medical News
https://www.readbyqxmd.com/read/29223473/-cryptogenic-west-syndrome-clinical-profile-response-to-treatment-and-prognostic-factors
#17
María Calderón Romero, Elena Arce Portillo, Mercedes López Lobato, Beatriz Muñoz Cabello, Bárbara Blanco Martínez, Marcos Madruga Garrido, Olga Alonso Luego
INTRODUCTION: West syndrome (WS) is an age-dependent epileptic encephalopathy in which the prognosis varies according to the, not always identified, underlying origin. OBJECTIVES: To define the profile of cryptogenic (a least studied isolated sub-group) WS, in Spain. To study its outcome, response to different treatments, and to establish prognostic factors. PATIENTS AND METHODS: The study included a review of the medical records of 16 patients diagnosed with cryptogenic WS during the period, 2000-2015...
December 6, 2017: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/29222240/old-and-new-tools-in-the-clinical-diagnosis-of-inherited-bone-marrow-failure-syndromes
#18
REVIEW
Allison H West, Jane E Churpek
Patients with inherited bone marrow failure syndromes (IBMFSs) classically present with specific patterns of cytopenias along with congenital anomalies and/or other physical features that are often recognizable early in life. However, increasing application of genomic sequencing and clinical awareness of subtle disease presentations have led to the recognition of IBMFS in pediatric and adult populations more frequently than previously realized, such as those with early onset myelodysplastic syndrome (MDS). Given the well-defined differences in clinical management needs and outcomes for aplastic anemia, acute myeloid leukemia, and MDS in patients with an IBMFS vs those occurring sporadically, as well as nonhematologic comorbidities in patients with IBMFSs, it is critical for hematologists to understand how to approach screening for the currently known IBMFSs...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29216533/assessing-the-zoonotic-potential-of-arboviruses-of-african-origin
#19
REVIEW
Marietjie Venter
Several African arboviruses have emerged over the past decade in new regions where they caused major outbreaks in humans and/or animals including West Nile virus, Chikungunya virus and Zika virus. This raise questions regarding the importance of less known zoonotic arboviruses in local epidemics in Africa and their potential to emerge internationally. Syndromic surveillance in animals may serve as an early warning system to detect zoonotic arbovirus outbreaks. Rift Valley fever and Wesselsbronvirus are for example associated with abortion storms in livestock while West Nile-virus, Shuni virus and Middelburg virus causes neurological disease outbreaks in horses and other animals...
December 4, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/29216234/infant-and-dyadic-assessment-in-early-community-based-screening-for-autism-spectrum-disorder-with-the-preaut-grid
#20
Bertrand Olliac, Graciela Crespin, Marie-Christine Laznik, Oussama Cherif Idrissi El Ganouni, Jean-Louis Sarradet, Colette Bauby, Anne-Marie Dandres, Emeline Ruiz, Claude Bursztejn, Jean Xavier, Bruno Falissard, Nicolas Bodeau, David Cohen, Catherine Saint-Georges
BACKGROUND: The need for early treatment of autism spectrum disorders (ASD) necessitates early screening. Very few tools have been prospectively tested with infants of less than 12 months of age. The PREAUT grid is based on dyadic assessment through interaction and shared emotion and showed good metrics for predicting ASD in very-high-risk infants with West syndrome. METHODS: We assessed the ability of the PREAUT grid to predict ASD in low-risk individuals by prospectively following and screening 12,179 infants with the PREAUT grid at four (PREAUT-4) and nine (PREAUT-9) months of age...
2017: PloS One
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