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https://www.readbyqxmd.com/read/28106282/prediction-of-pan-specific-b-cell-epitopes-from-nucleocapsid-protein-of-hantaviruses-causing-hantavirus-cardiopulmonary-syndrome
#1
Sagadevan Kalaiselvan, Sathish Sankar, Mageshbabu Ramamurthy, Asit Ranjan Ghosh, Balaji Nandagopal, Gopalan Sridharan
Hantaviruses are emerging viral pathogens that causes hantavirus cardiopulmonary syndrome in the Americas (HCPS), a severe, sometimes fatal, respiratory disease in humans with a case fatality rate of ≥50%. IgM and IgG based serological detection methods are the most common approaches used for laboratory diagnosis of hantaviruses. Such emerging viral pathogens emphasizes the need for improved rapid diagnostic devices and vaccines incorporating pan-specific epitopes of genotypes. We predicted linear B-cell epitopes for hantaviruses that are specific to genotypes causing HCPS in humans using in silico prediction servers...
January 20, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28106253/massive-plasmablast-response-elicited-in-the-acute-phase-of-hantavirus-pulmonary-syndrome
#2
Marina García, Ayelén Iglesias, Verónica I Landoni, Carla Bellomo, Agostina Bruno, María Teresa Córdoba, Luciana Balboa, Gabriela C Fernández, María Del Carmen Sasiain, Valeria P Martínez, Pablo Schierloh
Beside its key diagnostic value, the humoral immune response is thought to play a protective role in Hantavirus Pulmonary Syndrome (HPS). However, little is known about the cell source of these antibodies during ongoing human infection. Herein we characterized B cell subsets circulating in Andes virus-infected patients. A notable potent plasmablast (PB) response that increased 100-fold over the baseline levels was observed around one week after the onset of symptoms. These PB present a CD3(neg) CD19(low) CD20(neg) CD38(hi) CD27(hi) CD138(+/-) IgA(+/-) surface phenotype together with the presence of cytoplasmic functional immunoglobulins...
January 20, 2017: Immunology
https://www.readbyqxmd.com/read/28105914/homology-modeling-and-molecular-dynamics-provide-structural-insights-into-tospovirus-nucleoprotein
#3
Rayane Nunes Lima, Muhammad Faheem, João Alexandre Ribeiro Gonçalves Barbosa, Marcelo Depólo Polêto, Hugo Verli, Fernando Lucas Melo, Renato Oliveira Resende
BACKGROUND: Tospovirus is a plant-infecting genus within the family Bunyaviridae, which also includes four animal-infecting genera: Hantavirus, Nairovirus, Phlebovirus and Orthobunyavirus. Compared to these members, the structures of Tospovirus proteins still are poorly understood. Despite multiple studies have attempted to identify candidate N protein regions involved in RNA binding and protein multimerization for tospovirus using yeast two-hybrid systems (Y2HS) and site-directed mutagenesis, the tospovirus ribonucleocapsids (RNPs) remains largely uncharacterized at the molecular level and the lack of structural information prevents detailed insight into these interactions...
December 15, 2016: BMC Bioinformatics
https://www.readbyqxmd.com/read/28105849/antiviral-therapy-and-prevention-against-hantavirus-infections
#4
R Szabó
Hantaviruses are emerging zoonoses hosted by small mammals. In humans, they cause two diseases. Hemorrhagic fever with renal syndrome is mainly caused by Dobrava-Belgrade virus, Puumala virus, Seoul virus and Hantaan virus in Asia and Europe. On the other hand, the most important causes of hantavirus cardiopulmonary syndrome are Sin Nombre virus and Andes virus in Americas. Ribavirin yet remains the only licensed drug against the hantavirus infections, but its sufficient antiviral activity remains an issue under discussion...
January 19, 2017: Acta Virologica
https://www.readbyqxmd.com/read/28104185/causes-and-outcomes-of-sepsis-in-southeast-asia-a-multinational-multicentre-cross-sectional-study
#5
(no author information available yet)
BACKGROUND: Improved understanding of pathogens that cause sepsis would aid management and antimicrobial selection. In this study, we aimed to identify the causative pathogens of sepsis in southeast Asia. METHODS: In this multinational multicentre cross-sectional study of community-acquired sepsis and severe sepsis, we prospectively recruited children (age ≥30 days and <18 years) and adults (age ≥18 years) at 13 public hospitals in Indonesia (n=3), Thailand (n=4), and Vietnam (n=6)...
February 2017: Lancet Global Health
https://www.readbyqxmd.com/read/28103211/notes-from-the-field-hantavirus-pulmonary-syndrome-in-a-migrant-farm-worker-colorado-2016
#6
Grace Marx, Kaylan Stinson, Monte Deatrich, Bernadette Albanese
On August 8, 2016, Tri-County Health Department (Adams, Arapahoe, and Douglas counties) in Colorado was notified of a confirmed case of hantavirus pulmonary syndrome (HPS). The patient was a previously healthy male migrant farm worker aged 25 years, living in farm quarters, and working in vegetable fields for 8 weeks before symptom onset. On July 20, he experienced sudden onset of fever, severe headache, myalgias, cough, and nosebleed. He was evaluated at an emergency department on July 23, where his temperature was 103...
January 20, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28093611/a-highly-divergent-puumala-virus-lineage-in-southern-poland
#7
Ulrike M Rosenfeld, Stephan Drewes, Hanan Sheikh Ali, Edyta T Sadowska, Magdalena Mikowska, Gerald Heckel, Paweł Koteja, Rainer G Ulrich
Puumala virus (PUUV) represents one of the most important hantaviruses in Central Europe. Phylogenetic analyses of PUUV strains indicate a strong genetic structuring of this hantavirus. Recently, PUUV sequences were identified in the natural reservoir, the bank vole (Myodes glareolus), collected in the northern part of Poland. The objective of this study was to evaluate the presence of PUUV in bank voles from southern Poland. A total of 72 bank voles were trapped in 2009 at six sites in this part of Poland...
January 16, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28089865/pathogens-and-epidemiologic-features-of-severe-fever-with-thrombocytopenia-syndrome-in-hubei-province-china
#8
Jianbo Zhan, Jing Cheng, Bing Hu, Jing Li, Ruangang Pan, Zhaohui Yang, Wenjing Zou, Faxian Zhan, Deyin Guo
To evaluate the aetiological agents and epidemiologic features of severe fever with thrombocytopenia syndrome (SFTS) in Hubei Province, China, sera from patients were collected from January to December 2011. All cases occurred from April to December, and the epidemic peaked from May to August. The ages of patients ranged from 10 to 86 years (median=55years), and the incidence of SFTS increased with age. The female:male ratio of cases was 1.008:1, and 54.6% (77/141) and 1.4% (2/141) of the cases were confirmed by qPCR to be SFTSV and Hantavirus (HV) infection, respectively...
January 12, 2017: Virus Research
https://www.readbyqxmd.com/read/28075239/hantavirus-strains-in-east-africa-related-to-western-african-hantaviruses
#9
Jana Těšíková, Anna Bryjová, Josef Bryja, Leonid A Lavrenchenko, Joëlle Goüy de Bellocq
Hantaviruses are RNA viruses primarily carried by rodents, soricomorphs, and bats. The data about the distribution and genetic diversity of these viruses are often limited, especially in most regions of sub-Saharan Africa. Moreover, the majority of representatives were identified in western African localities, while only three hantaviruses have been reported in East Africa to date. In this study, a total of 1866 small mammals captured between 2009 and 2014 in various countries of Eastern Africa (Ethiopia, Zambia, Mozambique, Kenya, and Tanzania) were molecularly screened for the presence of hantaviruses...
January 11, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28057727/indoleamine-2-3-dioxygenase-activity-is-associated-with-regulatory-t-cell-response-in-acute-puumala-hantavirus-infection
#10
Tuisku-Tuulia Koivula, Anni Tuulasvaara, Iivo Hetemäki, Mikko Hurme, Satu Mäkelä, Jukka Mustonen, Antti Vaheri, T Petteri Arstila
High indoleamine 2,3-dioxygenase (IDO) activity is associated with clinically severe acute infection caused by Puumala hantavirus. The immunoregulatory effects of IDO can be mediated either through metabolic control of effector T cells, caused by depletion of the essential amino acid tryptophan, or intercellular signaling and activation of regulatory T cell responses. Here we have studied 24 patients with acute PUUV infection to distinguish between these possibilities. Maximum IDO activity showed a significant positive correlation with FOXP3 expression levels in regulatory T cells, a quantitative surrogate marker for suppressive capability...
January 5, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28049381/kidney-disease-in-puumala-hantavirus-infection
#11
Jukka Mustonen, Tuula Outinen, Outi Laine, Ilkka Pörsti, Antti Vaheri, Satu Mäkelä
Acute kidney injury (AKI) remains a predominant clinical expression of nephropathia epidemica (NE). Its pathogenesis is not yet fully understood. Here, we describe the tissue injury comprehensively and present new data aimed to characterize the injury and explain its pathophysiology. When compared to tubulointerstitial nephritis of a wide variety of other aetiologies, a high degree of proteinuria is a distinguished trait of NE, a finding that is also helpful in the clinical suspicion of the disease. Recently, novel biomarkers for the prediction of severe AKI, including neutrophil gelatinase-associated lipocalin (NGAL), have been identified and ultrastructural tissue changes have been more accurately described...
January 3, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28035113/serological-surveillance-of-vector-borne-and-zoonotic-diseases-among-hunters-in-eastern-poland
#12
Małgorzata Tokarska-Rodak, Dorota Plewik, Aleksander J Michalski, Marcin Kołodziej, Alicja Mełgieś, Anna Pańczuk, Henryk Konon, Marcin Niemcewicz
BACKGROUND & OBJECTIVES: Many etiological agents of zoonoses are considered as significant biological hazard to people visiting forested areas frequently, for instance, hunters. They may be exposed to ticks, rodents, and birds as well as excreta/secretions of wild animals or contaminated water and soil. Hence, this population is at risk of contracting infection with pathogens such as Borrelia burgdorferi sensu lato (s.l.), Anaplasma phagocytophilum, Babesia spp., tick-borne encephalitis virus, Bartonella spp...
October 2016: Journal of Vector Borne Diseases
https://www.readbyqxmd.com/read/28033261/elevated-thrombopoietin-and-platelet-indices-confirm-active-thrombopoiesis-but-fail-to-predict-clinical-severity-of-puumala-hantavirus-infection
#13
Outi Laine, Lotta Joutsi-Korhonen, Riitta Lassila, Heini Huhtala, Antti Vaheri, Satu Mäkelä, Jukka Mustonen
We evaluated the mechanisms of thrombocytopenia and procoagulant changes in relation with clinical variables in a cohort of patients with acute hantavirus disease.Blood samples of 33 prospectively recruited, consecutive, hospitalized patients with acute Puumala virus-induced hemorrhagic fever with renal syndrome (HFRS) were collected acutely and at the recovery visit (control). Serum thrombopoietin (TPO) and activity of plasma microparticles (MPs) from various cell sources were measured with enzyme-linked immunosorbent assay-based methods...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28025098/novel-hantavirus-identified-in-european-bat-species-nyctalus-noctula
#14
Petra Straková, Lucie Dufkova, Jana Širmarová, Jiří Salát, Tomáš Bartonička, Boris Klempa, Florian Pfaff, Dirk Höper, Bernd Hoffmann, Rainer G Ulrich, Daniel Růžek
Hantaviruses are emerging RNA viruses that cause human diseases predominantly in Asia, Europe, and the Americas. Besides rodents, insectivores and bats serve as hantavirus reservoirs. We report the detection and genome characterization of a novel bat-borne hantavirus isolated from insectivorous common noctule bat. The newfound virus was tentatively named as Brno virus.
December 23, 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27983499/host-associated-absence-of-human-puumala-virus-infections-in-northern-and-eastern-germany
#15
Stephan Drewes, Hanan Sheikh Ali, Moritz Saxenhofer, Ulrike M Rosenfeld, Florian Binder, Fabian Cuypers, Mathias Schlegel, Susanne Röhrs, Gerald Heckel, Rainer G Ulrich
Human hantavirus disease cases, caused by Puumala virus (PUUV), are mainly recorded in western and southern areas of Germany. This bank vole reservoir survey confirmed PUUV presence in these regions but its absence in northern and eastern regions. PUUV occurrence is associated with the presence of the Western bank vole phylogroup.
January 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/27960210/community-acquired-pneumonia-in-latin-america
#16
Hernán A Iannella, Carlos M Luna
Community-acquired pneumonia (CAP) is associated with significant morbidity and mortality in Latin America and the Caribbean (LAC) region. Poverty, socioeconomic factors, and malnutrition influence the incidence and outcome of CAP in LAC. In LAC, Streptococcus pneumoniae is the most frequent microorganism responsible for CAP, (incidence: 24-78%); the incidence of atypical microorganisms is similar to other regions of the world. Human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS) is a growing problem in the LAC region, with the Caribbean being the second most affected area worldwide after Sub-Saharan Africa...
December 2016: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/27956196/microevolution-of-bank-voles-myodes-glareolus-at-neutral-and-immune-related-genes-during-multiannual-dynamic-cycles-consequences-for-puumala-hantavirus-epidemiology
#17
Adelaïde Dubois, Maxime Galan, Jean-François Cosson, Bertrand Gauffre, Heikki Henttonen, Jukka Niemimaa, Maria Razzauti, Liina Voutilainen, Renaud Vitalis, Emmanuel Guivier, Nathalie Charbonnel
Understanding how host dynamics, including variations of population size and dispersal, may affect the epidemiology of infectious diseases through ecological and evolutionary processes is an active research area. Here we focus on a bank vole (Myodes glareolus) metapopulation surveyed in Finland between 2005 and 2009. Bank vole is the reservoir of Puumala hantavirus (PUUV), the agent of nephropathia epidemica (NE, a mild form of hemorrhagic fever with renal symptom) in humans. M.glareolus populations experience multiannual density fluctuations that may influence the level of genetic diversity maintained in bank voles, PUUV prevalence and NE occurrence...
December 9, 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27930572/acute-onset-chronic-inflammatory-demyelinating-polyneuropathy-in-hantavirus-and-hepatitis-b-virus-coinfection-a-case-report
#18
Jong Youb Lim, Young-Ho Lim, Eun-Hi Choi
INTRODUCTION: Chronic inflammatory demyelinating polyneuropathy (CIDP) is an acquired autoimmune disorder with progressive weakness. Acute-onset CIDP resembles Guillain-Barre syndrome (GBS), a rapidly progressive disorder, and follows a chronic course. To our knowledge, no case of acute-onset CIDP in hantavirus and hepatitis B virus (HBV) coinfection has been reported previously. CLINICAL FINDINGS: We report a case of acute-onset CIDP that was initially diagnosed as GBS...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27923570/recombinant-dna-vaccine-of-hantavirus-gn-and-lamp1-induced-long-term-immune-protection-in-mice
#19
Dong-Bo Jiang, Li-Juan Sun, Lin-Feng Cheng, Jin-Peng Zhang, Shao-Bo Xiao, Yuan-Jie Sun, Shu-Ya Yang, Jing Wang, Fang-Lin Zhang, Kun Yang
BACKGROUND: Prophylaxis is widely adopted the best choice against Hemorrhagic fever with renal syndrome (HFRS) caused by Hantavirus. However, loss of memory immune response maintenance remains as major shortcoming in current HFRS vaccine. A recombinant DNA vaccine, pVAX-LAMP/Gn was previously proved efficient, requiring long-term evaluations. METHODS & RESULTS: Immune responses of Balb/c mice were assessed by specific and neutralizing antibodies, interferon-γ ELISpot assay, and cytotoxic T-lymphocyte cytotoxicity assay...
February 2017: Antiviral Research
https://www.readbyqxmd.com/read/27918151/reservoir-driven-heterogeneous-distribution-of-recorded-human-puumala-virus-cases-in-south-west-germany
#20
S Drewes, H Turni, U M Rosenfeld, A Obiegala, P Straková, C Imholt, E Glatthaar, K Dressel, M Pfeffer, J Jacob, C Wagner-Wiening, R G Ulrich
Endemic regions for Puumala virus (PUUV) are located in the most affected federal state Baden-Wuerttemberg, South-West Germany, where high numbers of notified human hantavirus disease cases have been occurring for a long time. The distribution of human cases in Baden-Wuerttemberg is, however, heterogeneous, with a high number of cases recorded during 2012 in four districts (H districts) but a low number or even no cases recorded in four other districts (L districts). Bank vole monitoring during 2012, following a beech (Fagus sylvatica) mast year, resulted in the trapping of 499 bank voles, the host of PUUV...
December 5, 2016: Zoonoses and Public Health
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