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https://www.readbyqxmd.com/read/29159494/the-nucleocapsid-protein-of-hantaviruses-much-more-than-a-genome-wrapping-protein
#1
REVIEW
Monika Reuter, Detlev H Krüger
The nucleocapsid (N) protein of hantaviruses represents an impressive example of a viral multifunctional protein. It encompasses properties as diverse as genome packaging, RNA chaperoning, intracellular protein transport, DNA degradation, intervention in host translation, and restricting host immune responses. These functions all rely on the capability of N to interact with RNA and other viral and cellular proteins. We have compiled data on the N protein of different hantavirus species together with information of the recently published three-dimensional structural data of the protein...
November 20, 2017: Virus Genes
https://www.readbyqxmd.com/read/29141047/is-species-richness-driving-intra-and-interspecific-interactions-and-temporal-activity-overlap-of-a-hantavirus-host-an-experimental-test
#2
André V Rubio, Ivan Castro-Arellano, James N Mills, Rurik List, Rafael Ávila-Flores, Gerardo Suzán
High species diversity of the potential animal host community for a zoonotic pathogen may reduce pathogen transmission among the most competent host, a phenomenon called the "dilution effect", but the mechanisms driving this effect have been little studied. One proposed mechanism is "encounter reduction" where host species of low-competency decrease contact rates between infected and susceptible competent hosts, especially in directly transmitted diseases. We conducted an experiment in outdoor enclosures in northwestern Mexico where we manipulated rodent assemblages to assess the effect of species richness on the frequency of intra- and interspecific interactions and activity patterns of a hantavirus reservoir host (North American deermouse; Peromyscus maniculatus)...
2017: PloS One
https://www.readbyqxmd.com/read/29133028/evolution-and-postglacial-colonization-of-seewis-hantavirus-with-sorex-araneus-in-finland
#3
Jiaxin Ling, Teemu Smura, Daniel Tamarit, Otso Huitu, Liina Voutilainen, Heikki Henttonen, Antti Vaheri, Olli Vapalahti, Tarja Sironen
Hantaviruses have co-existed with their hosts for millions of years. Seewis virus (SWSV), a soricomorph-borne hantavirus, is widespread in Eurasia, ranging from Central Siberia to Western Europe. To gain insight into the phylogeography and evolutionary history of SWSV in Finland, lung tissue samples of 225 common shrews (Sorex araneus) trapped from different parts of Finland were screened for the presence of SWSV RNA. Forty-two of the samples were positive. Partial small (S), medium (M) and large (L) segments of the virus were sequenced, and analyzed together with all SWSV sequences available in Genbank...
November 10, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29129538/pneumonia-in-the-tropics-report-from-the-task-force-on-tropical-diseases-by-the-world-federation-of-societies-of-intensive-and-critical-care-medicine
#4
REVIEW
Mohd Basri Mat Nor, Guy A Richards, Steve McGloughlin, Pravin R Amin
The aetiology of community acquired pneumonia varies according to the region in which it is acquired. This review discusses those causes of CAP that occur in the tropics and might not be readily recognizable when transplanted to other sites. Various forms of pneumonia including the viral causes such as influenza (seasonal and avian varieties), the coronaviruses and the Hantavirus as well as bacterial causes, specifically the pneumonic form of Yersinia pestis and melioidosis are discussed.
November 3, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/29077702/a-lethal-disease-model-for-new-world-hantaviruses-using-immunosuppressed-syrian-hamsters
#5
Valentijn Vergote, Lies Laenen, Bert Vanmechelen, Marc Van Ranst, Erik Verbeken, Jay W Hooper, Piet Maes
BACKGROUND: Hantavirus, the hemorrhagic causative agent of two clinical diseases, is found worldwide with variation in severity, incidence and mortality. The most lethal hantaviruses are found on the American continent where the most prevalent viruses like Andes virus and Sin Nombre virus are known to cause hantavirus pulmonary syndrome. New World hantavirus infection of immunocompetent hamsters results in an asymptomatic infection except for Andes virus and Maporal virus; the only hantaviruses causing a lethal disease in immunocompetent Syrian hamsters mimicking hantavirus pulmonary syndrome in humans...
October 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29070692/the-post-fusion-structure-of-the-heartland-virus-gc-glycoprotein-supports-taxonomic-separation-of-the-bunyaviral-families-phenuiviridae-and-hantaviridae
#6
Yaohua Zhu, Yan Wu, Yan Chai, Jianxun Qi, Ruchao Peng, Wen-Hai Feng, George Fu Gao
Heartland virus (HRTV) is an emerging human pathogen that belongs to the newly defined family Phenuiviridae, order Bunyavirales Gn and Gc are two viral surface glycoproteins encoded by the M segment and are required for early events during infection. HRTV delivers its genome into the cytoplasm by fusion of the viral envelope and endosomal membranes under low pH conditions. Here, we describe the crystal structure of HRTV Gc in its post-fusion conformation. The structure shows that Gc displays a typical class II fusion protein conformation, and the overall structure is identical to severe fever with thrombocytopenia syndrome virus (SFTSV) Gc, which also belongs to the Phenuiviridae family...
October 25, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29063892/hantavirus-and-tuberculosis-co-infection-in-an-indian-child
#7
Someshwar Chate, Ira Shah, Hiren Doshi
Hantaviruses are a group of antigenically distinct viruses carried out in rodents and insectivores. Humans are accidental hosts and get infected by aerosols generated from contaminated urine, faeces and saliva of infected rodents. Hantaviruses are identified as aetiological agents of two human diseases, haemorrhagic fever with renal syndrome and hantavirus pulmonary syndrome. Hantavirus causing pulmonary renal disease has rarely been reported in children in India. Hantavirus infection is uncommon under the age of 12 years...
July 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/29029730/assessing-the-diversity-of-rodent-borne-viruses-exploring-of-high-throughput-sequencing-and-classical-amplification-sequencing-approaches
#8
Stephan Drewes, Petra Straková, Jan F Drexler, Jens Jacob, Rainer G Ulrich
Rodents are distributed throughout the world and interact with humans in many ways. They provide vital ecosystem services, some species are useful models in biomedical research and some are held as pet animals. However, many rodent species can have adverse effects such as damage to crops and stored produce, and they are of health concern because of the transmission of pathogens to humans and livestock. The first rodent viruses were discovered by isolation approaches and resulted in break-through knowledge in immunology, molecular and cell biology, and cancer research...
2017: Advances in Virus Research
https://www.readbyqxmd.com/read/29024905/hantavirus-maintenance-and-transmission-in-reservoir-host-populations
#9
REVIEW
Kristian M Forbes, Tarja Sironen, Alexander Plyusnin
Hantaviruses are primarily hosted by mammalian species of the orders Rodentia, Eulipotyphla and Chiroptera. Spillover to humans is common, and understanding hantavirus maintenance and transmission in reservoir host populations is important for efforts to curtail human disease. Recent field research challenges traditional phases of virus shedding kinetics derived from laboratory rodent infection experiments. Organ infection sites in non-rodent hosts suggest similar transmission routes to rodents, but require direct assessment...
October 9, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/29020303/risk-of-venous-thromboembolism-following-hemorrhagic-fever-with-renal-syndrome-a-self-controlled-case-series-study
#10
Anne-Marie Connolly-Andersen, Heather Whitaker, Jonas Klingström, Clas Ahlm
Background: Bleeding is associated with viral hemorrhagic fevers; however, thromboembolic complications has received less attention. Hemorrhagic fever with renal syndrome (HFRS) is a mild viral hemorrhagic fever caused by Puumala hantavirus. We previously identified HFRS as a risk factor for myocardial infarction and stroke, but the risk for venous thromboembolism (VTE), including deep vein thrombosis (DVT) and pulmonary embolism (PE) is unknown. Methods: Personal identity numbers from the Swedish HFRS database were cross-linked with the Patient Register to obtain information on all causes for hospitalization during 1964 to 2013...
September 4, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29018450/exploring-the-immunopathogenesis-of-viral-hemorrhagic-fever-in-mice-with-a-humanized-immune-system
#11
REVIEW
Günther Schönrich, Martin J Raftery
Viral hemorrhagic fever (VHF) as a disease entity was first codified in the 1930s by soviet scientists investigating patients suffering from hantavirus infection. The group of hemorrhagic fever viruses (HFVs) has since expanded to include members from at least four different virus families: Arenaviridae, Bunyaviridae, Filoviridae, and Flaviviridae, all enveloped single-stranded RNA viruses. After infection, the natural hosts of HFVs do not develop symptoms, whereas humans can be severely affected. This observation and other evidence from experimental data suggest that the human immune system plays a crucial role in VHF pathogenesis...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29017779/targeted-inhibition-of-hantavirus-replication-and-intracranial-pathogenesis-by-a-chimeric-protein-delivered-sirna
#12
Jie Yang, Ji-Feng Sun, Ting-Ting Wang, Xiao-Hong Guo, Jun-Xia Wei, Lin-Tao Jia, An-Gang Yang
Hantavirus (HV) infection, which underlies hantavirus hemorrhagic fever with renal syndrome and hantavirus pulmonary syndrome, remains to be a severe clinical challenge. Here, we synthesized small interfering RNAs (siRNAs) that target the encoding sequences of HV strain 76-118, and validated their inhibitory role in virus replication in HV-infected monkey kidney Vero E6 cells. A chimeric protein, 3G1-Cκ-tP, consisting of a single-chain antibody fragment (3G1) against the HV surface envelop glycoprotein, the constant region of human immunoglobulin κ chain (Cκ), and truncated protamine (amino acids 8-29, tP), was further generated...
October 7, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28986825/epidemiological-surveillance-of-viral-hemorrhagic-fevers-with-emphasis-on-clinical-virology
#13
Carolina Montoya-Ruiz, Juan David Rodas
This article will outline surveillance approaches for viral hemorrhagic fevers. Specific methods for surveillance of clinical samples will be emphasized. Separate articles will describe methods for surveillance of rodent-borne viruses (roboviruses) and arthropod-borne viruses (arboviruses). Since the appearance of hantaviruses and arenaviruses in the Americas, more than 30 different species in each group have been established, and therefore they have become the most frequently emerging viruses. Flaviviruses such as yellow fever and dengue viruses, although easier to recognize, are also more widely spread and therefore considered a very important public health issue, particularly for under-developed countries...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28986822/global-spread-of-hemorrhagic-fever-viruses-predicting-pandemics
#14
Jean-Paul Gonzalez, Marc Souris, Willy Valdivia-Granda
As successive epidemics have swept the world, the scientific community has quickly learned from them about the emergence and transmission of communicable diseases. Epidemics usually occur when health systems are unprepared. During an unexpected epidemic, health authorities engage in damage control, fear drives action, and the desire to understand the threat is greatest. As humanity recovers, policy-makers seek scientific expertise to improve their "preparedness" to face future events.Global spread of disease is exemplified by the spread of yellow fever from Africa to the Americas, by the spread of dengue fever through transcontinental migration of mosquitos, by the relentless influenza virus pandemics, and, most recently, by the unexpected emergence of Ebola virus, spread by motorbike and long haul carriers...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28986730/acute-hantavirus-infection-presenting-as-haemolytic-uraemic-syndrome-hus-the-importance-of-early-clinical-diagnosis
#15
J Clement, A P K Lee, G A Verpooten, L Laenen, V Vergote, H De Samblanx, Z N Berneman, M Van Ranst, P Maes
The European prototype of hantavirus, Puumala virus (PUUV), isolated from a common wild rodent, the bank vole (Myodes glareolus), causes nephropathia epidemica (NE). NE can perfectly mimic haemolytic-uraemic syndrome (HUS), progressing from an aspecific flu-like syndrome to acute kidney injury with thrombocytopaenia, and presenting with some signs of haemolytic anaemia and/or coagulopathy. Moreover, both NE and HUS can occur in local outbreaks. We report an isolated case of NE, initially referred for plasmapheresis for suspected HUS, although signs of overt haemolysis were lacking...
October 6, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28984763/epidemic-hemorrhagic-fever-complicated-with-late-pregnancy-a-case-report
#16
Xiao-Li Liu, Dong Hao, Xiao-Zhi Wang, Tao Wang, Feng Lu, Weili Liu, Bingjie Lv, Chang-Jun Lv
RATIONALE: Hantaviruses cause two forms of diseases in humans, namely hemorrhagic fever with renal syndrome (HFRS) and hantavirus pulmonary syndrome. Hantavirus infections can occur in pregnant women, and could influence the maternal and fetal outcomes, although this is a rare finding, even in endemic areas. PATIENT CONCERNS: In this report, we describe anunusual case involving a pregnant woman with HFRS who was in a state of shock. DIAGNOSES: Hemorrhagic fever with renal syndrome and septic shock...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28977768/interspecific-comparison-of-hantavirus-prevalence-in-peromyscus-populations-from-a-fragmented-agro-ecosystem-in-indiana
#17
Jacob L Berl, Amy J Kuenzi, Elizabeth A Flaherty, Robert K Swihart
Comparatively little is known about hantavirus prevalence within rodent populations from the Midwestern US, where two species of native mice, the prairie deer mouse (Peromyscus maniculatus bairdii) and the white-footed mouse (Peromyscus leucopus noveboracensis), are dominant members of rodent communities. We sampled both species in central Indiana and tested individuals for presence of hantavirus antibodies to determine whether seroprevalence (percent of individuals with antibodies reactive to Sin Nombre virus antigen) differed between species, or among different habitat types within fragmented agro-ecosystems...
October 4, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28975057/does-silvoagropecuary-landscape-fragmentation-affect-the-genetic-diversity-of-the-sigmodontine-rodent-oligoryzomys-longicaudatus
#18
Daniela Lazo-Cancino, Selim S Musleh, Cristian E Hernandez, Eduardo Palma, Enrique Rodriguez-Serrano
BACKGROUND: Fragmentation of native forests is a highly visible result of human land-use throughout the world. In this study, we evaluated the effects of landscape fragmentation and matrix features on the genetic diversity and structure of Oligoryzomys longicaudatus, the natural reservoir of Hantavirus in southern South America. We focused our work in the Valdivian Rainforest where human activities have produced strong change of natural habitats, with an important number of human cases of Hantavirus...
2017: PeerJ
https://www.readbyqxmd.com/read/28968301/diminished-coagulation-capacity-assessed-by-calibrated-automated-thrombography-during-acute-puumala-hantavirus-infection
#19
Sirpa M Koskela, Lotta Joutsi-Korhonen, Satu M Mäkelä, Heini Huhtala, Antti I Vaheri, Ilkka Pörsti, Jukka T Mustonen, Outi K Laine
: Coagulation abnormalities are associated with Puumala-virus-induced hemorrhagic fever with renal syndrome (PUUV-HFRS). We evaluated the coagulation capacity of plasma during acute PUUV-HFRS by measuring thrombin generation using calibrated automated thrombography (CAT). The study cohort comprised 27 prospectively collected, consecutive, hospital-treated patients with acute PUUV infection. Blood samples were drawn in the acute phase and at the control visit approximately 5 weeks later. To evaluate thrombin generation, the lag time of initiation, endogenous thrombin potential (ETP), and peak and time to peak thrombin concentration were assessed by CAT in platelet poor plasma without corn trypsin inhibitor...
September 28, 2017: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/28965516/high-prevalence-of-seoul-hantavirus-in-a-breeding-colony-of-pet-rats
#20
L M McELHINNEY, D A Marston, K C Pounder, H Goharriz, E L Wise, J Verner-Carlsson, D Jennings, N Johnson, A Civello, A Nunez, T Brooks, A C Breed, J Lawes, Å Lundkvist, C A Featherstone, A R Fooks
As part of further investigations into three linked haemorrhagic fever with renal syndrome (HFRS) cases in Wales and England, 21 rats from a breeding colony in Cherwell, and three rats from a household in Cheltenham were screened for hantavirus. Hantavirus RNA was detected in either the lungs and/or kidney of 17/21 (81%) of the Cherwell rats tested, higher than previously detected by blood testing alone (7/21, 33%), and in the kidneys of all three Cheltenham rats. The partial L gene sequences obtained from 10 of the Cherwell rats and the three Cheltenham rats were identical to each other and the previously reported UK Cherwell strain...
October 2, 2017: Epidemiology and Infection
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