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https://www.readbyqxmd.com/read/28100598/molecular-and-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-characterization-of-clinically-significant-melanized-fungi-in-india
#1
Ashutosh Singh, Pradeep Kumar Singh, Anil Kumar, Jagdish Chander, Geetika Khanna, Pradip Roy, Jacques F Meis, Anuradha Chowdhary
Melanized or black fungi are a heterogeneous group of fungi causing cutaneous to systemic diseases with high mortality. These fungi are rarely reported as agent of human infections primarily due to difficulties in their classical identification. In this study we examined using molecular methods and MALDI-TOF MS the diversity of melanized fungi (MF) isolated from patients in 19 medical centers in India. Overall, during a 4-year period, 718 (5.3%) clinical specimens yielded MF. Of these, 72 (10%) isolates had clinical significance and were identified primarily by sequencing the ITS and LSU regions...
January 18, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28099189/productive-infection-of-human-neural-progenitor-cells-by-r5-tropic-hiv-1-opiate-co-exposure-heightens-infectivity-and-functional-vulnerability
#2
Joyce M Balinang, Ruturaj R Masvekar, Kurt F Hauser, Pamela E Knapp
OBJECTIVE: Human immunodeficiency virus type-1 (HIV-1) causes a spectrum of CNS complications; many are worsened by opiate co-exposure. Human neural progenitor cells (hNPCs) give rise to all CNS neurons and macroglia. We tested the hypothesis that hNPC maturation and fate are altered by HIV and opiates, contributing to HIV-1-related neuropathology. Since reports that hNPCs are infectable remain controversial, we rigorously examined hNPC infection and ability to propagate infection, and determined whether HIV effects on hNPC function required infection...
January 17, 2017: AIDS
https://www.readbyqxmd.com/read/28092979/endovascular-treatment-of-hiv-associated-spontaneous-common-carotid-artery-pseudoaneurysm-in-a-case-of-miliary-and-cns-tuberculosis
#3
Rashmi Saraf, Amrita Narang, Mahesh Kardile, Prasad Udmale
HIV and tuberculosis infections are known to be associated with vasculopathy including occlusive disease and aneurysm formation. We report a case of 43-year-old male with miliary and central nervous system (CNS) tuberculosis; recently, diagnosed as HIV seropositive, on antiretroviral and antitubercular treatment presenting with painful neck swelling. He was found to have common carotid artery (CCA) pseudoaneurysm that was managed by endovascular stent grafting. HIV vasculopathy-related CCA pseudoaneurysm is a potentially life-threatening rare entity...
January 17, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28092661/interactions-between-the-microbiota-immune-and-nervous-systems-in-health-and-disease
#4
REVIEW
Thomas C Fung, Christine A Olson, Elaine Y Hsiao
The diverse collection of microorganisms that inhabit the gastrointestinal tract, collectively called the gut microbiota, profoundly influences many aspects of host physiology, including nutrient metabolism, resistance to infection and immune system development. Studies investigating the gut-brain axis demonstrate a critical role for the gut microbiota in orchestrating brain development and behavior, and the immune system is emerging as an important regulator of these interactions. Intestinal microbes modulate the maturation and function of tissue-resident immune cells in the CNS...
January 16, 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/28092613/effects-of-udder-infections-with-staphylococcus-xylosus-and-staphylococcus-warneri-on-the-composition-and-physicochemical-changes-in-cows-milk
#5
M Vasil, E Pecka-Kiełb, J Elečko, A Zachwieja, W Zawadzki, F Zigo, J Illek, Z Farkašová
The aim of this study was an evaluation of the effects of two species of coagulase negative staphylococci (CNS), Staphylococcus xylosus and Staphylococcus warneri, on the changes in technological parameters of cows' milk. The study was conducted in a herd of Slovak Pied cattle breed (with share of HF blood). Based on the performance results from three subsequent months, cows in the 2nd and 3rd lactation with SCC up to 200 thousand/ml (8 heads, 32 quarters), and above 800 thousand/ml (8 heads, 32 quarters), after the 4th month of lactation, were selected...
December 1, 2016: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28092376/infectious-immunity-in-the-central-nervous-system-and-brain-function
#6
REVIEW
Robyn S Klein, Charise Garber, Nicole Howard
Inflammation is emerging as a critical mechanism underlying neurological disorders of various etiologies, yet its role in altering brain function as a consequence of neuroinfectious disease remains unclear. Although acute alterations in mental status due to inflammation are a hallmark of central nervous system (CNS) infections with neurotropic pathogens, post-infectious neurologic dysfunction has traditionally been attributed to irreversible damage caused by the pathogens themselves. More recently, studies indicate that pathogen eradication within the CNS may require immune responses that interfere with neural cell function and communication without affecting their survival...
February 2017: Nature Immunology
https://www.readbyqxmd.com/read/28088641/pathophysiological-and-behavioral-effects-of-systemic-inflammation-in-aged-and-diseased-rodents-with-relevance-to-delirium-a-systematic-review
#7
REVIEW
Leroy Schreuder, Bart J L Eggen, Knut P H Biber, Regien G Schoemaker, Jon D Laman, Sophia E de Rooij
Delirium is a frequent outcome for aged and demented patients that suffer a systemic inflammatory insult. Animal models that reconstruct these etiological processes have potential to provide a better understanding of the pathophysiology of delirium. Therefore, we systematically reviewed animal studies in which systemic inflammation was superimposed on aged or diseased animal models. In total, 77 studies were identified. Aged animals were challenged with a bacterial endotoxin in 29 studies, 25 studies superimposed surgery on aged animals, and in 6 studies a bacterial infection, Escherichia coli (E...
January 11, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28087612/biofilm-formation-and-antimicrobial-resistance-genes-of-coagulase-negative-staphylococci-isolated-from-cows-with-mastitis-in-argentina
#8
Mariela E Srednik, Yannick D N Tremblay, Josée Labrie, Marie Archambault, Mario Jacques, Fernández Cirelli Alicia, Elida R Gentilini
Mastitis affects the health and welfare of dairy cows worldwide. Coagulase-negative staphylococci (CNS) are known to form biofilms and are increasingly recognized as a cause of persistent bovine intramammary infections. A total of 90 CNS isolated from cows with clinical and subclinical mastitis in Argentina from 2008-2014 were identified by PCR-RFLP using the gap gene. Standard microtiter plate assays were used to assess CNS biofilm formation and Staphylococcus haemolyticus species formed the strongest biofilms...
January 12, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28086758/toxoplasmosis-associated-iris-involving-the-cns-a-case-report-with-longitudinal-analysis-of-t-cell-subsets
#9
Rita Rb-Silva, Claudia Nobrega, Eugénia Reiriz, Soraia Almeida, Rui Sarmento-Castro, Margarida Correia-Neves, Ana Horta
BACKGROUND: HIV-infected patients may present an unforeseen clinical worsening after initiating antiretroviral therapy known as immune reconstitution inflammatory syndrome (IRIS). This syndrome is characterized by a heightened inflammatory response toward infectious or non-infectious triggers, and it may affect different organs. Diagnosis of IRIS involving the central nervous system (CNS-IRIS) is challenging due to heterogeneous manifestations, absence of biomarkers to identify this condition, risk of long-term sequelae and high mortality...
January 13, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28079042/study-of-interleukin-6-and-interleukin-8-levels-in-patients-with-neurological-manifestations-of-dengue
#10
V K Mehta, R Verma, R K Garg, H S Malhotra, P K Sharma, A Jain
CONTEXT: Pro-inflammatory markers play a key role in the pathogenesis of various Flavivirus infection. AIM: In this study, we evaluated the role of these markers in neurological manifestations of dengue. SETTINGS AND DESIGNS: Consecutive dengue cases with different neurological manifestations who presented between August 2012 and July 2014 were studied in hospital-based case-control study. MATERIALS AND METHODS: Interleukin (IL-6) and IL-8 level were measured in serum and cerebrospinal fluid (CSF) of dengue cases with different neurological manifestations and also in age- and sex-matched controls...
January 2017: Journal of Postgraduate Medicine
https://www.readbyqxmd.com/read/28078779/association-between-zika-virus-and-foetopathy-a-prospective-cohort-study-in-french-guiana-preliminary-report
#11
Léo Pomar, Gustavo Malinger, Guillaume Benoist, Gabriel Carles, Yves Ville, Dominique Rousset, Najeh Hcini, Céline Pomar, Anne Jolivet, Véronique Lambert
OBJECTIVES: The main objectives of the present study were to establish the existence of significant differences in the incidence of central nervous system (CNS) anomalies (including microcephaly), signs of congenital infection, or foetal loss between Zika virus (ZIKV)-infected and non-infected pregnant women in western French Guiana. METHODS: This prospective cohort study was conducted between January 1(st) and July 15(th) 2016. We evaluated the clinical and foetal ultrasound (US) examinations of 301 pregnant women with biological confirmation of ZIKV infection and 399 pregnant women who were negative for ZIKV infection...
January 12, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28076019/viral-and-prion-infections-of-the-central-nervous-system-radiologic-pathologic-correlation-from-the-radiologic-pathology-archives
#12
Kelly K Koeller, Robert Y Shih
Viral infections of the central nervous system (CNS) range in clinical severity, with the most severe proving fatal within a matter of days. Some of the more than 100 different viruses known to affect the brain and spinal cord are neurotropic with a predilection for producing CNS infection. The host response to viral infection of the CNS is responsible for the pathophysiology and imaging findings seen in affected patients. Viral CNS infections can take the form of meningitis, encephalitis, encephalomyelitis, or, when involving the spinal cord and nerve roots, encephalomyeloradiculitis...
January 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28074532/pathogenesis-of-developmental-anomalies-of-the-central-nervous-system-induced-by-congenital-cytomegalovirus-infection
#13
REVIEW
Hideya Kawasaki, Isao Kosugi, Shiori Meguro, Toshihide Iwashita
In humans, the herpes virus family member cytomegalovirus (CMV) is the most prevalent mediator of intrauterine infection-induced congenital defect. Central nervous system (CNS) dysfunction is a distinguishing symptom of CMV infection, and characterized by ventriculoencephalitis and microglial nodular encephalitis. Reports on the initial distribution of CMV particles and its receptors on the blood brain barrier (BBB) are rare. Nevertheless, several factors are suggested to affect CMV etiology. Viral particle size is the primary factor in determining the pattern of CNS infections, followed by the expression of integrin β1 in endothelial cells, pericytes, meninges, choroid plexus, and neural stem progenitor cells (NSPCs), which are the primary targets of CMV infection...
January 10, 2017: Pathology International
https://www.readbyqxmd.com/read/28074022/making-home-sweet-and-sturdy-toxoplasma-gondii-ppgalnac-ts-glycosylate-in-hierarchical-order-and-confer-cyst-wall-rigidity
#14
Tadakimi Tomita, Tatsuki Sugi, Rama Yakubu, Vincent Tu, Yanfen Ma, Louis M Weiss
: The protozoan intracellular parasite Toxoplasma gondii forms latent cysts in the central nervous system (CNS) and persists for the lifetime of the host. This cyst is cloaked with a glycosylated structure called the cyst wall. Previously, we demonstrated that a mucin-like glycoprotein, CST1, localizes to the cyst wall and confers structural rigidity on brain cysts in a mucin-like domain-dependent manner. The mucin-like domain of CST1 is composed of 20 units of threonine-rich tandem repeats that are O-GalNAc glycosylated...
January 10, 2017: MBio
https://www.readbyqxmd.com/read/28070871/treating-hiv-infection-in-the-central-nervous-system
#15
REVIEW
A Calcagno, G Di Perri, S Bonora
Combination antiretroviral treatment is associated with clear benefits in HIV-positive subjects, and is also effective in the central nervous system (CNS), meaning HIV-associated dementia is now an uncommon event. Nevertheless, a significant number of patients show symptoms of neurocognitive impairment which may negatively affect their quality of life. Although several risk factors for HIV-associated neurocognitive disorders have been identified, there is no clear recommendation for their prevention and management...
January 9, 2017: Drugs
https://www.readbyqxmd.com/read/28070007/first-evidence-of-angiostrongyliasis-caused-by-angiostrongylus-cantonensis-in-guadeloupe-lesser-antilles
#16
Céline Dard, Jean-Eudes Piloquet, Yvonne Qvarnstrom, LeAnne M Fox, Helmi M'kada, Jean-Christophe Hebert, Didier Mattera, Dorothée Harrois
Infection by the rat lungworm Angiostrongylus cantonensis represents the most common cause of infectious eosinophilic meningitis in humans, causing central nervous system (CNS) angiostrongyliasis. Most of CNS angiostrongyliasis cases were described in Asia, Pacific Basin, Australia, and some limited parts of Africa and America. CNS angiostrongyliasis has been reported in the Caribbean but never in the Lesser Antilles. The primary objectives of this study were to depict the first case of CNS angiostrongyliasis in the Lesser Antilles and investigate the environmental presence of A...
January 9, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28065740/bacterial-signaling-to-the-nervous-system-via-toxins-and-metabolites
#17
REVIEW
Nicole J Yang, Isaac M Chiu
Mammalian hosts interface intimately with commensal and pathogenic bacteria. It is increasingly clear that molecular interactions between the nervous system and microbes contribute to health and disease. Both commensal and pathogenic bacteria are capable of producing molecules that act on neurons and affect essential aspects of host physiology. Here we highlight several classes of physiologically important molecular interactions that occur between bacteria and the nervous system. First, clostridial neurotoxins block neurotransmission to or from neurons by targeting the SNARE complex, causing the characteristic paralyses of botulism and tetanus during bacterial infection...
January 5, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28062425/first-reported-case-of-disseminated-nocardia-kroppenstedtii-sp-nov-infection-presenting-with-brain-abscess-and-endocarditis-in-an-immunocompromised-patient-with-mantle-cell-lymphoma-challenges-in-diagnosis-and-treatment
#18
Aneela Majeed, Hafez Mohammad Ammar Abdullah, Waqas Ullah, Mayar Al Mohajer
A 72-year-old man with a history of blastoid variant stage IV relapsed refractory mantle cell lymphoma presented with new central nervous system (CNS) symptoms. Brain imaging was positive for rim-enhancing lesions along with a mitral valve mass on the echocardiogram. It was a challenge to establish the exact aetiology of these lesions in this patient. He was empirically treated with chemotherapy on the presumption that the brain lesions were secondary to progressive malignancy. However, brain biopsy was negative for malignancy and blood cultures were found positive for Nocardia kroppenstedtii sp nov...
January 6, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28058461/pet-brain-imaging-in-hiv-associated-neurocognitive-disorders-hand-in-the-era-of-combination-antiretroviral-therapy
#19
REVIEW
Jaime H Vera, Basil Ridha, Yvonne Gilleece, Aliza Amlani, Patrick Thorburn, Sabina Dizdarevic
Effective combination antiretroviral therapy (cART) has lead to a significant reduction in the prevalence and incidence of central nervous system (CNS) HIV-associated brain disease, particularly CNS opportunistic infections and HIV encephalitis. Despite this, cognitive deficits in people living with HIV, also known as HIV-associated neurocognitive disorders (HAND) have become more prevalent in recent years. The pathogenesis of HAND is likely to be multifactorial, however recent evidence suggests that brain microglial activation is the most likely pathogenic mechanism...
January 5, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28057805/cns-targeted-autoimmunity-leads-to-increased-influenza-mortality-in-mice
#20
Justin D Glenn, Matthew D Smith, Pei Xue, Yee Chan-Li, Samuel Collins, Peter A Calabresi, Maureen R Horton, Katharine A Whartenby
The discovery that central nervous system (CNS)-targeted autoreactive T cells required a process of licensing in the lung revealed an unexpected relationship between these organs. The clinical and immunological significance of this finding is bidirectional in that it showed not only a mechanism by which T cells become pathogenic before entering the CNS, but also the potential for this process to influence lung immunity as well. Epidemiological studies have shown that people with multiple sclerosis (MS) suffer from increased morbidity and mortality from infectious diseases, independent of immunosuppressive therapies...
January 5, 2017: Journal of Experimental Medicine
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