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https://www.readbyqxmd.com/read/28507114/antiviral-activity-of-nordihydroguaiaretic-acid-and-its-derivative-tetra-o-methyl-nordihydroguaiaretic-acid-against-west-nile-virus-and-zika-virus
#1
Teresa Merino-Ramos, Nereida Jiménez de Oya, Juan-Carlos Saiz, Miguel A Martín-Acebes
Flaviviruses are positive strand RNA viruses distributed all over the world that infect millions of people every year, and for which no specific antiviral agents have been approved. These viruses include the mosquito-borne West Nile virus (WNV) responsible for outbreaks of meningitis and encephalitis. Considering that nordihydroguaiaretic acid (NDGA) has been previously shown to inhibit the multiplication of the related dengue virus and hepatitis C virus, we have evaluated the effect of NDGA, and its methylated derivative tetra-O-methyl nordihydroguaiaretic (M4N), on the infection of WNV...
May 15, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28491476/increased-intracranial-pressure-in-the-setting-of-enterovirus-and-other-viral-meningitides
#2
Jules C Beal
Increased intracranial pressure due to viral meningitis has not been widely discussed in the literature, although associations with Varicella and rarely Enterovirus have been described. Patients with increased intracranial pressure and cerebrospinal fluid analysis suggestive of a viral process are sometimes classified as having atypical idiopathic intracranial hypertension (IIH). However, a diagnosis of IIH requires normal cerebrospinal fluid, and therefore in these cases an infection with secondary intracranial hypertension may be a more likely diagnosis...
2017: Neurology Research International
https://www.readbyqxmd.com/read/28482001/crimean-congo-hemorrhagic-fever-in-humanized-mice-reveals-glial-cells-as-primary-targets-of-neurological-infection
#3
Jessica R Spengler, M Kelly Keating, Anita K McElroy, Marko Zivcec, JoAnn D Coleman-McCray, Jessica R Harmon, Brigid C Bollweg, Cynthia S Goldsmith, Éric Bergeron, James G Keck, Sherif R Zaki, Stuart T Nichol, Christina F Spiropoulou
Crimean-Congo hemorrhagic fever (CCHF) is a tick-borne viral hemorrhagic disease seen exclusively in humans. Central nervous system (CNS) infection and neurological involvement have also been reported in CCHF. Here we inoculated NSGTM-SGM3 mice engrafted with human hematopoietic CD34+ stem cells with low passage CCHF virus strains isolated from human patients. Humanized mice develop lethal disease characterized by histopathological change in the liver and brain. To date, targets of neuroinfection and neuropathology have not been investigated in CCHF...
May 8, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28470016/relationship-of-human-immunodeficiency-virus-viral-load-in-cerebrospinal-fluid-and-plasma-in-patients-co-infected-with-cryptococcal-meningitis
#4
Christina C Chang, Richard Kangethe, Saleha Omarjee, Keshni Hiramen, Bernadett Gosnell, Katlego Sojane, Mohamed-Yunus S Moosa, Sharon R Lewin, Martyn A French, Thumbi Ndung'u
We measured human immunodeficiency virus (HIV) ribonucleic acid (RNA) in paired cerebrospinal fluid (CSF) and plasma samples in a prospective study of 91 HIV-infected, antiretroviral therapy-naive patients with cryptococcal meningitis. Cerebrospinal fluid HIV RNA was lower than in plasma (median 4.7 vs 5.2 log10 copies/mL, P < .0001) and positively correlated with plasma HIV RNA, peripheral CD4(+) T-cell percentage, and CSF CXCL10. Plasma/CSF ratio of HIV RNA ranged widely from 0.2 to 265.5 with a median of 2...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28469695/molecular-diagnosis-of-central-nervous-system-opportunistic-infections-and-mortality-in-hiv-infected-adults-in-central-china
#5
Rongrong Yang, Hong Zhang, Yong Xiong, Xien Gui, Yongxi Zhang, Liping Deng, Shicheng Gao, Mingqi Luo, Wei Hou, Deyin Guo
BACKGROUND: CSF PCR is the standard diagnostic technique used in resource-rich settings to detect pathogens of the CNS infection. However, it is not currently used for routine CSF testing in China. Knowledge of CNS opportunistic infections among people living with HIV in China is limited. METHODS: Intensive cerebrospiral fluid (CSF) testing was performed to evaluate for bacterial, viral and fungal etiologies. Pathogen-specific primers were used to detect DNA from cytomegalovirus (CMV), herpes simplex virus (HSV), varicella-zoster virus (VZV), Epstein-Barr virus (EBV), human herpesvirus 6 (HHV-6) and John Cunningham virus (JCV) via real-time polymerase chain reaction (PCR)...
2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28464834/molecular-diagnosis-of-central-nervous-system-opportunistic-infections-and-mortality-in-hiv-infected-adults-in-central-china
#6
Rongrong Yang, Hong Zhang, Yong Xiong, Xien Gui, Yongxi Zhang, Liping Deng, Shicheng Gao, Mingqi Luo, Wei Hou, Deyin Guo
BACKGROUND: CSF PCR is the standard diagnostic technique used in resource-rich settings to detect pathogens of the CNS infection. However, it is not currently used for routine CSF testing in China. Knowledge of CNS opportunistic infections among people living with HIV in China is limited. METHODS: Intensive cerebrospiral fluid (CSF) testing was performed to evaluate for bacterial, viral and fungal etiologies. Pathogen-specific primers were used to detect DNA from cytomegalovirus (CMV), herpes simplex virus (HSV), varicella-zoster virus (VZV), Epstein-Barr virus (EBV), human herpesvirus 6 (HHV-6) and John Cunningham virus (JCV) via real-time polymerase chain reaction (PCR)...
May 2, 2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28463942/diagnostic-practices-for-suspected-community-acquired-central-nervous-system-infection-in-the-post-conjugate-vaccine-era
#7
Natalie Banniettis, Saumya Joshi, Shubhi Kaushik, Stephan Kohlhoff, Margaret R Hammerschlag
OBJECTIVE: The aim of this study was to evaluate diagnostic practices for suspected community-acquired central nervous system (CNS) infection in an urban pediatric population. METHODS: This is an observational, retrospective single-center review of cerebrospinal fluid (CSF) studies in children, 1 month to 21 years old, evaluated for suspected CNS infection from 2004 to 2014. Cases of suspected nosocomial meningitis were excluded. The frequency of N-methyl-D-aspartate receptor antibody (NMDAR ab) encephalitis was analyzed from 2010 to 2014...
May 1, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28444539/association-of-the-oas3-rs1859330-g-a-genetic-polymorphism-with-severity-of-enterovirus-71-infection-in-chinese-han-children
#8
Yuxia Tan, Tingting Yang, Peipei Liu, Liping Chen, Qingwu Tian, Ya Guo, Hongfang He, Yedan Liu, Zongbo Chen
The 2'5'-oligoadenylate synthetase (OAS) is an interferon (IFN)-induced protein that plays an important role in the antiviral action of IFN, with OAS3 being one of the four OAS classes (OAS1, OAS2, OAS3, OASL). The effect of OAS on several infectious viral diseases has been reported; however, a study of the effect of OAS3 on enterovirus 71 (EV71) is lacking. The purpose of this study was to evaluate the association of the OAS3 rs1859330 G/A genetic polymorphism with susceptibility and severity of EV71 infection...
April 25, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28425387/zebra-borne-neurotropic-equid-herpesvirus-1-meningoencephalitis-in-a-thomson-s-gazelle-eudorcas-thomsonii
#9
Kanako Sakaguchi, Kenneth Kim, Ingeborg Langohr, Annabel G Wise, Roger K Maes, Gordon Pirie, Tokuma Yanai, Mohie Haridy, Lorrie Gaschen, Fabio Del Piero
We describe the histopathologic, immunohistochemical, and molecular features of a case of meningoencephalitis in a Thomson's gazelle ( Eudorcas thomsonii) naturally infected with zebra-borne equid herpesvirus 1 (EHV-1) and the implications for the molecular detection of zebra-borne EHV-1. A 4-y-old female Thomson's gazelle was submitted for postmortem examination; no gross abnormalities were noted except for meningeal congestion. Microscopic evaluation demonstrated multifocal nonsuppurative meningoencephalitis with intranuclear eosinophilic and amphophilic inclusion bodies and EHV-9 antigen in neurons...
April 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28425045/soluble-triggering-receptor-expressed-on-myeloid-cell-1-strem-1-a-potential-biomarker-for-the-diagnosis-of-infectious-diseases
#10
REVIEW
Changlin Cao, Jingxian Gu, Jingyao Zhang
Sensitive and useful biomarkers for the diagnosis and prognosis of infectious diseases have been widely developed. An example of these biomarkers is triggering receptor expressed on myeloid cell-1 (TREM-1), which is a cell surface receptor expressed on monocytes/macrophages and neutrophils. TREM-1 amplifies inflammation by activating the TREM-1/DAP12 pathway. This pathway is triggered by the interaction of TREM-1 with ligands or stimulation by bacterial lipopolysaccharide. Consequently, pro-inflammatory cytokines and chemokines are secreted...
April 19, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28417331/use-of-high-dose-oral-valacyclovir-during-an-intravenous-acyclovir-shortage-a-retrospective-analysis-of-tolerability-and-drug-shortage-management
#11
Milena M McLaughlin, Sarah H Sutton, Ashley O Jensen, John S Esterly
INTRODUCTION: In late 2011, a shortage of IV acyclovir led to the need to empirically substitute high-dose oral valacyclovir (HDVA) to conserve IV acyclovir for patients with confirmed herpes simplex virus (HSV) meningitis or encephalitis. This report describes the management of the most recent national IV acyclovir shortage by the Antimicrobial Stewardship Program (ASP) at Northwestern Memorial Hospital (NMH), Chicago, IL, USA, and the use of HDVA. Secondarily, we assessed the safety and tolerability of HDVA as an alternate to IV acyclovir during this shortage...
April 17, 2017: Infectious Diseases and Therapy
https://www.readbyqxmd.com/read/28409290/comparison-of-clinical-and-laboratory-characteristics-during-two-major-paediatric-meningitis-outbreaks-of-echovirus-30-and-other-non-polio-enteroviruses-in-germany-in-2008-and-2013
#12
H Rudolph, R Prieto Dernbach, M Walka, P Rey-Hinterkopf, V Melichar, E Muschiol, S Schweitzer-Krantz, J W Richter, C Weiss, S Böttcher, S Diedrich, H Schroten, T Tenenbaum
Viral meningitis is mainly caused by non-polio enteroviruses (NPEV). Large-scale data on the clinical characteristics between different outbreaks within the same region are lacking. This study aimed to analyse a possible influence of the circulating NPEV genotype on the disease outcome of affected children. A retrospective cohort study analysing two major outbreaks of NPEV meningitis in Germany in 2008 and 2013 was conducted in cooperation with the National Reference Centre for Poliomyelitis and Enteroviruses (NRC PE) and five German children's hospitals...
April 13, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28397477/real-time-pcr-detection-of-the-most-common-bacteria-and-viruses-causing-meningitis
#13
Oya Akkaya, Hulya Iren Guvenc, Serife Yuksekkaya, Aysegul Opus, Asuman Guzelant, Meral Kaya, Muhammet Guzel Kurtoglu, Nurettin Kaya
BACKGROUND: Central nervous system (CNS) infections require prompt diagnosis, as the clinical condition progresses rapidly and may lead to severe permanent sequelae or death. The causative agents include viruses, bacteria, fungi, and parasites. In this study, samples with the diagnosis of CNS infection based on cerebrospinal fluid (CSF) sent to us from other hospitals/labs, were studied by multiplex real-time Polymerase Chain Reaction (PCR) method. The purpose of this study is to demonstrate, retrospectively, the most common bacteria and viruses causing meningitis and seasonal distribution of these agents using the multiplex real-time PCR method in CSF samples...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28384999/pathogenesis-of-coxsackievirus-b2-in-mice-characterisation-of-clinical-isolates-of-the-coxsackievirus-b2-from-patients-with-myocarditis-and-aseptic-meningitis-in-korea
#14
JiYoung Hong, BungHak Kang, SangGu Yeo, Youngmee Jee, Jae-Hak Park
Group B coxsackieviruses (CVBs) are a group of common human pathogens causing various clinical symptoms. Although the virology of CVB is well known, there is limited information on viral pathogenesis and the relationship between clinical symptoms and viral phenotype, particularly for CVB type 2 (CVB2). In this study, two CVB2 strains were isolated: CB2/04/279 from a stool of an acute myocarditis patient with heart failure; and CB2/04/243 from an aseptic meningitis patient in 2004 in Korea. A high degree of homology was observed between the CB2/04/279 and CB2/04/243 full genome sequences...
April 6, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/28351758/the-mouse-cortical-meninges-are-the-site-of-immune-responses-to-many-different-pathogens-and-are-accessible-to-in-vivo-imaging
#15
REVIEW
Jonathan A Coles, Phillip J Stewart-Hutchinson, Elmarie Myburgh, James M Brewer
A wide range of viral and microbial infections are known to cause meningitis, and there is evidence that the meninges are the gateway to pathogenic invasion of the brain parenchyma. Hence observation of these regions has wide application to understanding host-pathogen interactions. Interactions between pathogens and cells of the immune response can be modified by changes in their environment, such as suppression of the flow of blood and lymph, and, particularly in the case of the meninges with their unsupported membranes, invasive dissection can alter the tissue architecture...
March 25, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28351439/-revision-of-the-dutch-college-of-general-practitioners-practice-guideline-children-with-fever
#16
W E Eizenga, W Opstelten
- Fever in children is usually caused by benign viral infection.- Approximately 1-10% of children with fever has or develops a serious infection such as pneumonia, meningitis or pyelonephritis.- It is more important to timely recognize symptoms that may indicate a potentially serious disease course than to make an exact diagnosis.- Children < 3 months are at greater risk for a serious disease course.- During follow-up it is important to provide parents with proper advice on the expected disease course and who they should contact, and when, in cases of deterioration or concern...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28346504/diagnostic-accuracy-of-two-multiplex-real-time-polymerase-chain-reaction-assays-for-the-diagnosis-of-meningitis-in-children-in-a-resource-limited-setting
#17
Jermaine Khumalo, Mark Nicol, Diana Hardie, Rudzani Muloiwa, Phindile Mteshana, Colleen Bamford
INTRODUCTION: Accurate etiological diagnosis of meningitis is important, but difficult in resource-limited settings due to prior administration of antibiotics and lack of viral diagnostics. We aimed to develop and validate 2 real-time multiplex PCR (RT-PCR) assays for the detection of common causes of community-acquired bacterial and viral meningitis in South African children. METHODS: We developed 2 multiplex RT- PCRs for detection of S. pneumoniae, N. meningitidis, H...
2017: PloS One
https://www.readbyqxmd.com/read/28341167/procalcitonin-as-a-potential-predicting-factor-for-prognosis-in-bacterial-meningitis
#18
Bong Soo Park, Si Eun Kim, Si Hyung Park, Jinseung Kim, Kyong Jin Shin, Sam Yeol Ha, JinSe Park, Sung Eun Kim, Byung In Lee, Kang Min Park
We investigated the potential role of serum procalcitonin in differentiating bacterial meningitis from viral meningitis, and in predicting the prognosis in patients with bacterial meningitis. This was a retrospective study of 80 patients with bacterial meningitis (13 patients died). In addition, 58 patients with viral meningitis were included as the disease control groups for comparison. The serum procalcitonin level was measured in all patients at admission. Differences in demographic and laboratory data, including the procalcitonin level, were analyzed between the groups...
February 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28337608/age-specific-application-of-neutrophil-to-lymphocyte-ratio-in-meningitis-a-nationwide-study
#19
A-F A Mentis, M A Kyprianou, G Tzanakaki
Cerebrospinal fluid (CSF) neutrophil counts and neutrophil-to-lymphocyte ratio (NLR) are useful in distinguishing bacterial and viral meningitis. Given that meningitis is clinically heterogeneous with regard to age, here we investigated the validity of the CSF NLR and neutrophil assay according to age group. Data from the nationwide referral of >4,000 meningitis cases to the Hellenic Meningitis Reference Laboratory between 2006 and 2013 were examined. CSF NLR and neutrophil counts were stratified according to age, and assay performance was determined using previous cut-off values of 2 and 287 cells/μl for CSF NLR and neutrophils respectively...
March 24, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28332092/the-spectrum-of-neuropathological-changes-associated-with-congenital-zika-virus-infection
#20
Leila Chimelli, Adriana S O Melo, Elyzabeth Avvad-Portari, Clayton A Wiley, Aline H S Camacho, Vania S Lopes, Heloisa N Machado, Cecilia V Andrade, Dione C A Dock, Maria Elisabeth Moreira, Fernanda Tovar-Moll, Patricia S Oliveira-Szejnfeld, Angela C G Carvalho, Odile N Ugarte, Alba G M Batista, Melania M R Amorim, Fabiana O Melo, Thales A Ferreira, Jacqueline R L Marinho, Girlene S Azevedo, Jeime I B F Leal, Rodrigo F Madeiro da Costa, Stevens Rehen, Monica B Arruda, Rodrigo M Brindeiro, Rodrigo Delvechio, Renato S Aguiar, Amilcar Tanuri
A major concern associated with ZIKV infection is the increased incidence of microcephaly with frequent calcifications in infants born from infected mothers. To date, postmortem analysis of the central nervous system (CNS) in congenital infection is limited to individual reports or small series. We report a comprehensive neuropathological study in ten newborn babies infected with ZIKV during pregnancy, including the spinal cords and dorsal root ganglia (DRG), and also muscle, pituitaries, eye, systemic organs, and placentas...
March 22, 2017: Acta Neuropathologica
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