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https://www.readbyqxmd.com/read/28644743/sarcocystis-jamaicensis-n-sp-from-red-tailed-hawks-buteo-jamaicensis-definitive-host-and-ifn-%C3%AE-gene-knockout-mice-as-experimental-intermediate-host
#1
Shiv Verma, Alexa Rosypal Von Dohlen, J Mowery, D Scott, B Rosenthal, J P Dubey, David Lindsay
Here, we report a new species of Sarcocystis with red-tailed hawk (RTH) as the natural definitive host and IFN-γ gene knockout (KO) mice as an experimental intermediate host in which sarcocysts form in muscle. Two RTHs submitted to the Carolina Raptor Center, Huntersville, North Carolina, were euthanized because they could not be rehabilitated and released. Fully sporulated 12.5 x 9.9 m sized sporocysts were found in intestinal scrapings of both hawks. Sporocysts were orally fed to laboratory-reared outbred Swiss Webster mice (SW) (Mus musculus) and also to KO mice...
June 23, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28642475/a-novel-bzip-protein-gsb1-is-required-for-oxidative-stress-response-mating-and-virulence-in-the-human-pathogen-cryptococcus-neoformans
#2
Seon Ah Cheon, Eun Jung Thak, Yong-Sun Bahn, Hyun Ah Kang
The human pathogen Cryptococcus neoformans, which causes life-threatening meningoencephalitis in immunocompromised individuals, normally faces diverse stresses in the human host. Here, we report that a novel, basic, leucine-zipper (bZIP) protein, designated Gsb1 (general stress-related bZIP protein 1), is required for its normal growth and diverse stress responses. C. neoformans gsb1Δ mutants grew slowly even under non-stressed conditions and showed increased sensitivity to high or low temperatures. The hypersensitivity of gsb1Δ to oxidative and nitrosative stresses was reversed by addition of a ROS scavenger...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28638843/susceptibility-to-cryptococcal-meningoencephalitis-associated-with-idiopathic-cd4-lymphopenia-and-secondary-germline-or-acquired-defects
#3
Anil A Panackal, Lindsey B Rosen, Gulbu Uzel, Michael J Davis, Guowu Hu, Adebowale Adeyemo, Fasil Tekola-Ayele, Andrea Lisco, Christopher Diachok, Jonathan D Kim, Dawn Shaw, Irini Sereti, Jennifer Stoddard, Julie Niemela, Sergio D Rosenzweig, John E Bennett, Peter R Williamson
Idiopathic CD4(+) lymphopenia (ICL) predisposes to opportunistic infections (OIs) but can often remain asymptomatic and does not have a strong association with monogenic mutations. Likewise, cryptococcal meningoencephalitis, the most common OI in ICL, is not strongly associated with monogenic mutations. In this study, we describe 2 patients with ICL plus an additional immune defect: one from an E57K genetic mutation in the nuclear factor-κβ essential modulator, and the other with acquired autoantibodies to granulocyte-macrophage colony-stimulating factor...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28638259/global-alert-zika-virus-an-emerging-arbovirus
#4
REVIEW
Zulal Ozkurt, Esra Cinar Tanriverdi
Zika virus (ZIKV) is an arbovirus of the Flavivirus genus, and it has an envelope and a single RNA molecule. In early 2016, the World Health Organization declared ZIKV infection to be an emerging global health threat. The major transmission route of the virus to humans is Aedes mosquitoes. ZIKV can be transmitted between humans by transplacental, perinatal, and sexual routes and via blood and body fluids. ZIKV infection usually results in a mild and self-limiting disease with low-grade fever, conjunctivitis, and periorbital edema...
June 2017: Eurasian Journal of Medicine
https://www.readbyqxmd.com/read/28636287/the-spectrum-of-aseptic-central-nervous-system-infections-in-southern-germany-demographic-clinical-and-laboratory-findings
#5
M Kaminski, V Grummel, D Hoffmann, A Berthele, B Hemmer
BACKGROUND AND PURPOSE: Aseptic infections of the central nervous system (CNS) are frequently observed in Germany. However, no study has systematically addressed the spectrum of aseptic CNS infections in Germany. METHODS: Data on 191 adult patients diagnosed from January 2007 to December 2014 with aseptic meningitis or encephalitis/meningoencephalitis at our hospital were collected by chart review and analyzed for demographic, clinical and laboratory findings. Patients were stratified according to the causative virus and findings were compared between groups...
June 21, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28632511/zika-virus-a-cause-of-concern-in-transplantation
#6
Marilyn E Levi
PURPOSE OF REVIEW: Worldwide, the number of countries reporting Zika virus (ZKV) infection continues to increase. Although 80% of cases are asymptomatic, ZKV has been identified as a neurotropic virus associated with congenital microcephaly, Guillain-Barre' syndrome, and meningoencephalitis. Until recently, infection in transplant recipients has not been identified. This study will review the existing literature on ZKV infection, laboratory testing, and management in transplant recipients...
June 16, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28632298/patient-med-tbe-f%C3%A3-rb%C3%A3-ttrades-snabbt-vid-behandling-med-kortison-evidens-saknas-dock-f%C3%A3-r-v%C3%A3-rdet-av-immunmodulerande-terapi
#7
Carl Wengse, Jesper Ericsson, Susanna Hallberg, Johan Ursing
Rapid improvement of tick-borne encephalitis after treatment with corticosteroids Tick-borne encephalitis (TBE) is a viral disease transmitted by ticks. The virus is divided into three subtypes named Western, Siberian and Far Eastern TBE virus (TBEV). Western TBEV is endemic in parts of Europe and Sweden and typically causes a biphasic illness with influenza-like symptoms followed by neurological symptoms ranging from mild meningitis to severe meningoencephalitis and death. Despite an effective vaccine, TBE is increasing in Sweden and Europe...
June 16, 2017: Läkartidningen
https://www.readbyqxmd.com/read/28630845/multi-foci-salmonella-enteritis-osteomyelitis-of-thoracic-spine-with-pleural-effusion-and-fatal-outcome-a-unique-case-presentation-and-review-of-the-literature
#8
Ioannis Papaioannou, Andreas Baikousis, Panagiotis Korovessis
INTRODUCTION: A case of thoracic vertebral osteomyelitis due to Salmonella enteritis (SE) in an immunocompetent patient is reported. This is the third case in the literature of SE thoracic vertebral osteomyelitis, but the first one with this multi-foci presentation and finally fatal outcome due to meningoencephalitis. Further data that makes our case unique are the absence of fever (body temperature: 37.4°C) and gastrointestinal disorders. CASE REPORT: A 57-year-old male patient initially presented with thoracic pain, dyspnea, and knee pain...
January 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28628941/a-novel-cause-of-chronic-viral-meningoencephalitis-cache-valley-virus
#9
Michael R Wilson, Dan Suan, Andrew Duggins, Ryan D Schubert, Lillian M Khan, Hannah A Sample, Kelsey C Zorn, Aline Rodrigues Hoffman, Anna Blick, Meena Shingde, Joseph L DeRisi
OBJECTIVE: Immunodeficient patients are particularly vulnerable to neuroinvasive infections that can be challenging to diagnose. Metagenomic next-generation sequencing can identify unusual or novel microbes and is therefore well suited for investigating the etiology of chronic meningoencephalitis in immunodeficient patients. METHODS: We present the case of a 34 year-old man with X-linked agammaglobulinemia from Australia suffering from three years of meningoencephalitis that defied an etiologic diagnosis despite extensive conventional testing, including a brain biopsy...
June 19, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28626635/eosinophilic-meningoencephalitis-associated-with-rat-lungworm-angiostrongylus-cantonensis-migration-in-two-nine-banded-armadillos-dasypus-novemcinctus-and-an-opossum-didelphis-virginiana-in-the-southeastern-united-states
#10
Martha F Dalton, Heather Fenton, Christopher A Cleveland, Elizabeth J Elsmo, Michael J Yabsley
Angiostrongylus cantonensis, the rat lungworm, was the cause of neural larval migrans in two nine-banded armadillos (Dasypus novemcinctus) and one Virginia opossum (Didelphis virginiana) from the southeastern United States. Histologic findings in all three cases included eosinophilic meningoencephalitis with variable numbers of nematode larvae in the meninges or the neuroparenchyma. In two of the three cases, nematodes were extracted from brain tissue via a "squash prep" method. Identification of the nematodes was confirmed by amplification and sequence analysis of the partial cytochrome c oxidase subunit I gene from all three cases...
August 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/28617719/guillain-barr%C3%A3-syndrome-and-zika-virus-outbreaks
#11
Osvaldo J M Nascimento, Ivan R F da Silva
PURPOSE OF REVIEW: Arboviruses have been associated with central and peripheral nervous system injuries, in special the flaviviruses. Guillain-Barré syndrome (GBS), transverse myelitis, meningoencephalitis, ophthalmological manifestations, and other neurological complications have been recently associated to Zika virus (ZIKV) infection. In this review, we aim to analyze the epidemiological aspects, possible pathophysiology, and what we have learned about the clinical and laboratory findings, as well as treatment of patients with ZIKV-associated neurological complications...
June 14, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/28615901/varicella-zoster-virus-infection-of-the-central-nervous-system-10-year-experience-from-a-tertiary-hospital-in-south-india
#12
Ronald Albert Benton Carey, Vignesh Kumar Chandiraseharan, Anitha Jasper, Tunny Sebastian, Chrusolitha Gujjarlamudi, Sowmya Sathyendra, Anand Zachariah, Asha Mary Abraham, Thambu David Sudarsanam
INTRODUCTION: Varicella zoster virus is an exclusively human neurotrophic virus. The primary infection with the virus causes varicella. The virus remains latent in nervous tissue and upon secondary activation causes a variety of syndromes involving the central nervous system (CNS) including meningoencephalitis and cerebellitis. MATERIALS AND METHODS: In this study, we looked at the epidemiology, clinical and laboratory features, and outcomes of patients who were admitted with varicella zoster of the CNS from 2005 to 2014...
April 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28606355/analysis-of-multiple-components-involved-in-the-interaction-between-cryptococcus-neoformans-and-acanthamoeba-castellanii
#13
Juliana Rizzo, Priscila C Albuquerque, Julie M Wolf, Renata Nascimento, Marcos D Pereira, Joshua D Nosanchuk, Marcio L Rodrigues
Cryptococcus neoformans is an environmental fungus that can cause lethal meningoencephalitis in immunocompromised individuals. The mechanisms by which environmental microbes become pathogenic to mammals are still obscure, but different studies suggest that fungal virulence evolved from selection imposed by environmental predators. The soil-living Acanthamoeba castellanii is a well-known predator of C. neoformans. In this work, we evaluated the participation of C. neoformans virulence-associated structures in the interaction of fungal cells with A...
June 2017: Fungal Biology
https://www.readbyqxmd.com/read/28605078/morphology-and-phylogenetic-analyses-of-three-novel-naegleria-isolated-from-freshwaters-on-jeju-island-korea-during-the-winter-period
#14
Woo Jun Khwon, Jong Soo Park
The genus Naegleria is one of the best known heterolobosean groups, and is the causative agent of primary amoebic meningoencephalitis. This group is rarely studied in temperate regions during winter. Here, three novel Naegleria were isolated from freshwaters on Jeju Island, Korea, during winter. Two isolates were amoeboflagellates, and one of the three amoebae did not undergo enflagellation. All amoebae had eruptive pseudopodia, and the layer of refractile granules around a large nucleus. They formed a cyst with ~2 pores in the cyst stage...
June 12, 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/28577289/immunoglobulin-responsive-chikungunya-encephalitis-two-case-reports
#15
Stephanie Suzanne de O Scott, Pedro Braga-Neto, Lícia Pacheco Pereira, Paulo Ribeiro Nóbrega, Francisco de Assis Aquino Gondim, Manoel Alves Sobreira-Neto, Claudia Carvalho Mendes Schiavon
Chikungunya virus is an alphavirus transmitted by the mosquito Aedes, mainly Aedes aegypti and Aedes albopictus, that can cause acute illness, mostly self-limited, characterized by fever, maculopapular rash, and disabling polyarthritis/arthralgia, with an incubation period of 1 to 12 days. Chikungunya was largely regarded as a non-fatal and self-limited disease, but recently, serious cases have been reported including some with severe involvement of the nervous system, such as meningoencephalitis, myelitis, polyradiculitis, and polyradiculoneuropathy...
June 2, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28575919/zika-virus-infection-in-pregnant-women-and-microcephaly
#16
Geraldo Duarte, Antonio Fernandes Moron, Artur Timerman, César Eduardo Fernandes, Corintio Mariani Neto, Gutemberg Leão de Almeida Filho, Heron Werner Junior, Hilka Flavia Barra do Espírito Santo, João Alfredo Piffero Steibel, João Bortoletti Filho, Juvenal Barreto Borriello de Andrade, Marcelo Burlá, Marcos Felipe Silva de Sá, Newton Eduardo Busso, Paulo César Giraldo, Renato Augusto Moreira de Sá, Renato Passini Junior, Rosiane Mattar, Rossana Pulcineli Vieira Francisco
From the discovery of the Zika virus (ZIKV) in 1947 in Uganda (Africa), until its arrival in South America, it was not known that it would affect human reproductive life so severely. Today, damage to the central nervous system is known to be multiple, and microcephaly is considered the tip of the iceberg. Microcephaly actually represents the epilogue of this infection's devastating process on the central nervous system of embryos and fetuses. As a result of central nervous system aggression by the ZIKV, this infection brings the possibility of arthrogryposis, dysphagia, deafness and visual impairment...
May 2017: Revista Brasileira de Ginecologia e Obstetrícia
https://www.readbyqxmd.com/read/28571198/deep-cerebral-vein-thrombosis-a-clinical-masquerader
#17
Prabhat Kumar, Gargi Sasmal, Subodh Kumar Mahto, Shreya Gupta, Harish Gupta
Cerebral Vein Thrombosis (CVT) is an uncommon cause of stroke. Thrombosis can occur in superficial veins, deep venous system or cortical veins of brain. The term Deep Cerebral Vein Thrombosis (DCVT) is used for thrombosis of internal cerebral vein, vein of Galen and basal vein of Rosenthal. Only 10% cases of CVT are because of thrombosis of deep cerebral vein. The diagnosis of DCVT is often missed because of its heterogenous presentation. Herein, we present a case of DCVT which was initially treated as meningoencephalitis...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28559832/chronic-autoimmune-meningoencephalitis-and-periodic-fever-syndrome-treated-with-anakinra
#18
Alyssa-Rae Novroski, Kelly J Baldwin
We report the case of a 63-year-old male diagnosed with chronic autoimmune mediated meningoencephalitis and periodic cyclical fever syndrome. After 2 years of failed conventional treatment and recurrent hospitalizations, anakinra treatment (an interleukin-1 [IL-1] receptor antagonist) was trialed which resulted in full recovery. As evidenced by this case, anakinra can be used to treat chronic autoimmune meningitis, which can often be refractory to treatment.
January 2017: Case Reports in Neurology
https://www.readbyqxmd.com/read/28554246/fungal-infections-in-patients-treated-with-ibrutinib-two-unusual-cases-of-invasive-aspergillosis-and-cryptococcal-meningoencephalitis
#19
Marine Baron, Jean Marc Zini, Thibaut Challan Belval, Marguerite Vignon, Blandine Denis, Alexandre Alanio, Marion Malphettes
No abstract text is available yet for this article.
May 30, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28548945/soluble-antigens-from-the-neurotropic-pathogen-angiostrongylus-cantonensis-directly-induce-thymus-atrophy-in-a-mouse-model
#20
Zhen Liu, Dong-Ming Su, Zi-Long Yu, Feng Wu, Rui-Feng Liu, Shi-Qi Luo, Zhi-Yue Lv, Xin Zeng, Xi Sun, Zhong-Dao Wu
The nematode Angiostrongylus cantonensis (A.C.) is a neurotropic pathogen; stage-III larva invade the human (non-permissive host) central nervous system (CNS) to cause eosinophilic meningitis or meningoencephalitis accompanied by immunosuppression. In an A.C.-infectedmouse (another non-permissive host) model, CNS damage-associated T cell immune deficiency and severe inflammation were proposed to result from activation of the hypothalamic-pituitary-adrenal (HPA) axis. However, glucocorticoids are anti-inflammatory agents...
May 12, 2017: Oncotarget
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