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early diagnosis of hantavirus infection by family doctors can reduce inappropriate antibiotic use and hospitalization.hantavirus infections are emerging infections that cause either hantavirus pulmonary syndrome or haemorrhagic fever with renal syndrome (hfrs). a recent swedish outbreak of nephropathia epidemica, a european hfrs, was analysed to study the patient flow and clinical picture and to investigate the value of an early diagnosis in general practice. design. in a retrospective design, medical records of verified cases of hantavirus infection were studied.201020642397
satellite derived forest phenology and its relation with nephropathia epidemica in belgium.the connection between nephropathia epidemica (ne) and vegetation dynamics has been emphasized in recent studies. changing climate has been suggested as a triggering factor of recently observed epidemiologic peaks in reported ne cases. we have investigated whether there is a connection between the ne occurrence pattern in belgium and specific trends in remotely sensed phenology parameters of broad-leaved forests. the analysis of time series of the modis enhanced vegetation index revealed that ch ...201020644685
temporal and spatial host abundance and prevalence of andes hantavirus in southern argentina.andes virus (and) is a hantavirus hosted by the sigmodontine rodent oligoryzomys longicaudatus in southern argentina, where it is responsible for most cases of hantavirus pulmonary syndrome (hps). our study provides data about the spatial variation in abundance of the rodent host of and hantavirus. we report results of a longitudinal study performed in a locality of the andean region of chubut province. from november 2003 (spring) to july 2006 (winter), o. longicaudatus was the most common speci ...201020645121
confirmation of choclo virus as the cause of hantavirus cardiopulmonary syndrome and high serum antibody prevalence in panama.choclo virus (chov) was described in sigmodontine rodents, oligoryzomys fulvescens, and humans during an outbreak of hantavirus cardiopulmonary syndrome (hcps) in 1999-2000 in western panama. although hcps is rare, hantavirus-specific serum antibody prevalence among the general population is high suggesting that chov may cause many mild or asymptomatic infections. the goals of this study were to confirm the role of chov in hcps and in the frequently detected serum antibody and to establish the p ...201020648614
the 3' untranslated region of the andes hantavirus small mrna functionally replaces the poly(a) tail and stimulates cap-dependent translation initiation from the viral mrna.in the process of translation of eukaryotic mrnas, the 5' cap and the 3' poly(a) tail interact synergistically to stimulate protein synthesis. unlike its cellular counterparts, the small mrna (smrna) of andes hantavirus (andv), a member of the bunyaviridae, lacks a 3' poly(a) tail. here we report that the 3' untranslated region (3'utr) of the andv smrna functionally replaces a poly(a) tail and synergistically stimulates cap-dependent translation initiation from the viral mrna. stimulation of tra ...201020660206
switch to high-level virus replication and hla class i upregulation in differentiating megakaryocytic cells after infection with pathogenic hantavirus.hantaan virus (htnv), the prototype member of the hantavirus genus in the family bunyaviridae, causes hemorrhagic fever with renal syndrome (hfrs) in humans. hemorrhage is due to endothelial barrier damage and a sharp decrease in platelet counts. the mechanisms underlying htnv-associated acute thrombocytopenia have not been elucidated so far. platelets are produced by mature megakaryocytes that develop during megakaryopoiesis. in this study, we show that htnv targets megakaryocytic cells whereas ...201020673746
occupation-related respiratory infections revisited.occupational pulmonary infectious diseases include tuberculosis (tb) and many viral pathogens, including influenza, coronavirus (severe acute respiratory syndrome or sars), varicella, respiratory syncytial virus, and hantavirus. this review focuses on tb, influenza, and sars, because the published literature is extensive for these 3 infections. the lessons from these 3 are relevant for all nosocomial pulmonary infectious diseases.201020674797
hantavirus infections in humans and animals, china.hemorrhagic fever with renal syndrome (hfrs) is a serious public health problem in the people's republic of china. although 7 sero/genotypes of hantaviruses have been found in rodents, only hantaan virus (carried by apodemus agrarius mice) and seoul virus (carried by rattus norvegicus rats) reportedly cause disease in humans. during 1950-2007, a total of 1,557,622 cases of hfrs in humans and 46,427 deaths (3%) were reported in china. hfrs has been reported in 29 of 31 provinces in china. after i ...201020678311
travellers and viral haemorrhagic fevers: what are the risks?viral haemorrhagic fevers (vhf) are caused by zoonotic viral infections transmitted to humans directly or by ticks or mosquitoes. the overall risk to travellers is conservatively estimated at <1 in 1 million travel episodes to african countries where infection is present, and febrile patients returning from these countries are at least 1000 times more likely to have malaria than lassa fever or another vhf. no cases have been reported in fellow travellers exposed to a travelling case and only one ...201020705436
geographical range of rio mamoré virus (family bunyaviridae, genus hantavirus) in association with the small-eared pygmy rice rat (oligoryzomys microtis).hantavirus htn.007 was originally isolated from a small-eared pygmy rice rat (oligoryzomys microtis) captured in northeastern peru. the results of analyses of nucleotide and amino acid sequence data in this study indicated that htn.007 is a strain of rio mamoré virus (riomv) which is enzootic in small-eared pygmy rice rat populations in bolivia. as such, the results of this study extend our knowledge of the geographical range of riomv and support the notion that the small-eared pygmy rice rat is ...201020687859
natural history of sin nombre virus infection in deer mice in urban parks in oregon.sin nombre virus (snv), one of at least 45 hantaviruses described worldwide, is hosted by the deer mouse, peromyscus maniculatus, a common species throughout most of north america. herein, we describe general life-history characteristics of deer mice and the ways in which these factors relate to the incidence of snv infections among populations of this host species in and around portland, oregon. in total, 3,175 deer mice were captured from october 2002 to september 2005. transmission of snv app ...201020688636
tnf-α expression and promoter sequences reflect the balance of tolerance/resistance to puumala hantavirus infection in european bank vole populations.the tumor necrosis factor-alpha (tnf-α) influences the ability to limit parasite infection but its over-production might result in inflammatory disorders. the level of tnf-α gene expression could thus mediate a balance of tolerance/resistance to infections. this study focused on puumala hantavirus (puuv) infection in its rodent host, the bank vole (myodes glareolus). in humans, puuv is responsible of a mild form of hemorrhagic fever with renal syndrome, nephropathia epidemica (ne). the severity ...201020691810
long-term patterns of immune investment by wild deer mice infected with sin nombre virus.immunocompetence of animals fluctuates seasonally, however, there is little consensus on the cause of these fluctuations. some studies have suggested that these patterns are influenced by changes in reproductive condition, whereas others have suggested that differences result from seasonal variations in energy expenditures. the objective of our study was to examine these contrasting views of immunity by evaluating seasonal patterns of immune response and reproduction in wild populations of deer ...201020695811
hantavirus pulmonary syndrome in the atlantic argentinean patagonia region.the hantavirus causes a hemorrhagic disease and in 1993 was responsible for an outbreak of a pulmonary syndrome in the south of the united states of america. the disease is endemic in the north of argentina where the oran strain is prevalent. a fatal case of the hanta pulmonary syndrome (hps) occurring in a migrant agricultural worker is reported.201021413585
rapid expansion and long-term persistence of elevated nk cell numbers in humans infected with hantavirus.natural killer (nk) cells are known to mount a rapid response to several virus infections. in experimental models of acute viral infection, this response has been characterized by prompt nk cell activation and expansion followed by rapid contraction. in contrast to experimental model systems, much less is known about nk cell responses to acute viral infections in humans. we demonstrate that nk cells can rapidly expand and persist at highly elevated levels for >60 d after human hantavirus infecti ...201021173105
modulation of innate immune responses by hantaviruses.hantavirus infection can cause hantavirus cardiopulmonary syndrome or hemorrhagic fever with renal syndrome depending on the virus species involved. the determinants for the virus species specific virulence in humans are unclear. successful infection is a conditio sine qua non for the virulence of a virus and it is well-known that the innate interferon (ifn) system generally plays a decisive role to prevent establishment of an infection. the importance of the ifn system is underscored by the fac ...201021175415
vegfr2 and src kinase inhibitors suppress andes virus-induced endothelial cell permeability.hantaviruses predominantly infect human endothelial cells and, in the absence of cell lysis, cause two diseases resulting from increased vascular permeability. andes virus (andv) causes a highly lethal acute pulmonary edema termed hantavirus pulmonary syndrome (hps). andv infection enhances the permeability of endothelial cells in response to vascular endothelial growth factor (vegf) by increasing signaling responses directed by the vegfr2-src-ve-cadherin pathway, which directs adherens junction ...201021177802
[morphological findings in fatal cases of hantavirus cardiopulmonary syndrome. report of 7 autopsies].hantavirus cardiopulmonary syndrome (hcps) is an acute infectious disease characterized by sudden cardiorespiratory failure and high mortality, caused by a rna virus of the genus hantavirus, family bunyaviridae, 15% of chilean cases have been detected in the araucania region.201021186503
an efficient in vivo method for the isolation of puumala virus in syrian hamsters and the characterization of the isolates from russia.puumala virus (puuv) and other arvicolinae-borne hantaviruses are difficult to cultivate in cell culture. to isolate these hantaviruses efficiently, hantavirus nucleocapsid protein (np)-positive but seronegative wild rodents were selected by np-detection elisa. three of 68 myodes glareolus captured in samara, russia, were np-positive and seronegative. syrian hamsters were inoculated with lung homogenates from np-positive rodents for virus propagation. virus isolation in vitro was carried out by ...201021192975
a pauci-symptomatic case of documented hantavirus (puumala) infection in a patient under anti-tnf treatment.we describe the case of an 18-yr-old male under anti-tnf treatment for crohn's disease for more than 8 months. he developed fever and biological inflammatory syndrome without absolutely no accompanying sign or symptom or paraclinical abnormality despite extensive work-up performed in the context of his immunocompromised state. symptoms disappeared after 10 days and a diagnosis of puumala infection was made retrospectively on a serological basis. the case illustrates that anti-tnf treatment does ...201021195021
hantavirus pulmonary syndrome in argentina, 1995-2008.we report a large case series of hantavirus pulmonary syndrome (hps) in argentina that was confirmed by laboratory results from 1995 through 2008. the geographic and temporal distribution of cases by age, sex, fatality rate, and risk factors for hps was analyzed. a total of 710 cases were unequally distributed among 4 of the 5 argentine regions. different case-fatality rates were observed for each affected region, with a maximum rate of 40.5%. the male-to-female ratio for hps case-patients was 3 ...201021122213
hantaviruses and hantavirus pulmonary syndrome, maranhao, brazil.to confirm circulation of anajatuba virus in maranhao, brazil, we conducted a serologic survey (immunoglobulin g elisa) and phylogenetic studies (nucleocapsid gene sequences) of hantaviruses from wild rodents and persons with hantavirus pulmonary syndrome. this virus is transmitted by oligoryzomys fornesi rodents and is responsible for hantavirus pulmonary syndrome in this region.201021122229
aromatic and polar residues spanning the candidate fusion peptide of the andes virus gc protein are essential for membrane fusion and infection.hantaviruses infect human cells through cell attachment and subsequent fusion of viral and cellular membranes at low ph. this largely unknown entry process is mediated by the gn and gc glycoproteins, anchored at the viral envelope membrane. performing bioinformatic analysis and peptide-liposome-binding assays we suggested in a former report that gc of andes virus (andv) and other hantaviruses corresponds to the viral fusion protein sharing characteristics with class ii fusion proteins. to gain i ...201021123541
impacts of biodiversity on the emergence and transmission of infectious diseases.current unprecedented declines in biodiversity reduce the ability of ecological communities to provide many fundamental ecosystem services. here we evaluate evidence that reduced biodiversity affects the transmission of infectious diseases of humans, other animals and plants. in principle, loss of biodiversity could either increase or decrease disease transmission. however, mounting evidence indicates that biodiversity loss frequently increases disease transmission. in contrast, areas of natural ...201021124449
genetic characterization of hantaviruses associated with sigmodontine rodents in an endemic area for hantavirus pulmonary syndrome in southern brazil.an ecological assessment of reservoir species was conducted in a rural area (jaborá) in the mid-west of the state of santa catarina in southern brazil, where hantavirus pulmonary syndrome is endemic, to evaluate the prevalence of hantavirus infection in wild rodents. blood and tissue samples were collected from 507 rodents during seven field trips from march 2004 to april 2006. some of the animals were karyotyped to confirm morphological identification. phylogenetic reconstructions of rodent spe ...201021138380
[nephropathia epidemica caused by puumala hantavirus infection: a case report from the outpatient sector].a 42-year-old man without pre-existing health problems presented to his family practitioner in baden-württemberg with fever (up to 39˚ c for two days), headache, abdominal pain, back pain and aching limbs. ten days before, he had done heavy gardening work. he felt diffuse pain on abdominal palpation. the physical examination of the skin, lymph nodes, the heart, the lungs and the oral mucosa was unremarkable.201021140328
temporal variation in individual factors associated with hantavirus infection in bank voles during an epizootic: implications for puumala virus transmission dynamics.abstract puumala virus (puuv), the causal agent of nephropathia epidemica in humans, is one of the many hantaviruses included in the list of emerging pathogens. hantavirus infection is not distributed evenly among puuv reservoir hosts (i.e., bank voles [myodes glareolus]). besides environmental factors and local population features, individual characteristics play an important role in vole puuv infection risk. identifying the relative importance of these individual characteristics can provide cr ...201021142469
evidence of human hantavirus infection and zoonotic investigation of hantavirus prevalence in rodents in western java, indonesia.abstract during febrile surveillance in the western java city of bandung, indonesia, a patient with clinical symptoms consistent with hantavirus infection was found to have elevated titers of hantavirus-specific immunoglobulin m (igm) and igg antibodies. a subsequent epizoological investigation demonstrated a higher prevalence of hantavirus igg antibodies in rodents trapped in the vicinity of the patient's home compared with rodents from a control area (13.2% vs. 4.7%, p = 0.036). the old world ...201021142967
characterization of monoclonal antibodies against hantavirus nucleocapsid protein and their use for immunohistochemistry on rodent and human samples.monoclonal antibodies are important tools for various applications in hantavirus diagnostics. recently, we generated puumala virus (puuv)-reactive monoclonal antibodies (mabs) by immunisation of mice with chimeric polyomavirus-derived virus-like particles (vlps) harbouring the 120-amino-acid-long amino-terminal region of the puuv nucleocapsid (n) protein. here, we describe the generation of two mabs by co-immunisation of mice with hexahistidine-tagged full-length n proteins of sin nombre virus ( ...201021161552
[genetic analysis of hantaviruses carried by rattus norvegicus collected from henan and neimenggu provinces, china.]objective: genetic analysis was performed to infer the relationship between hantaviruses carried by rattus norvegicus from henan and neimenggu provinces and the other known hantavirus and the vaccine strain. methods: total rna was extracted from lung tissues with trizol reagent. the complete m and s segment sequences of strains nm133 and q12 were amplified by rt-pcr. the purified dna fragments were directly subjected to sequencing, and then to sequence analysis and phylogenetic analysis. results ...201021162871
[epidemiology and surveillance programs on hemorrhagic fever with renal syndrome in mainland china, 2005 - 2008.]objective: to analyze the epidemiologic and surveillance data of hemorrhagic fever with renal syndrome (hfrs) in china, from 2005 to 2008, to describe the epidemiology and trend of hfrs. methods: descriptive epidemiology were studied to analyze the surveillance data from 2005 to 2008, collected from both the internet-based national notifiable disease reporting system and 40 hfrs sentinel sites developed since 2005 in 40 counties around china. results: a total of 56 077 hfrs cases and 692 deaths ...201021163102
a temporal dilution effect: hantavirus infection in deer mice and the intermittent presence of voles in montana.the effect of intermittently occurring, non-reservoir host species on pathogen transmission and prevalence in a reservoir population is poorly understood. we investigated whether voles, microtus spp., which occur intermittently, influenced estimated standing antibody prevalence (esap) to sin nombre hantavirus (snv, bunyaviridae: hantavirus) among deer mice, peromyscus maniculatus, whose populations are persistent. we used 14 years of data from central montana to investigate whether esap among de ...201021170746
small mammal-associated zoonoses. 201020795915
hantaviruses and their hosts in europe: reservoirs here and there, but not everywhere?five hantaviruses are known to circulate among rodents in europe, and at least two among insectivores. four (dobrava, saaremaa, seoul, and puumala [puuv] viruses) are clearly associated with hemorrhagic fever with renal syndrome (hfrs). puuv, the most common etiological agent of hfrs in europe, is carried by the bank vole (myodes glareolus), one of the most widespread and abundant mammal species in europe. this host-virus system is among hantaviruses also the most studied one in europe. however, ...201020795916
diagnosis of hantavirus infection in humans and rodents in ribeirão preto, state of são paulo, brazil.hantavirus pulmonary and cardiovascular syndrome (hpcs) is an emerging serious disease in the americas. hantaviruses (bunyaviridae) are the causative agents of this syndrome and are mainly transmitted through inhalation of aerosols containing the excreta of wild rodents. in the ribeirão preto region (state of são paulo, brazil), hpcs has been reported since 1998, caused by the araraquara virus (arav), for which necromys lasiurus is the rodent reservoir. this study aimed to show diagnostic result ...201020802928
andes virus disrupts the endothelial cell barrier by induction of vascular endothelial growth factor and downregulation of ve-cadherin.hantavirus pulmonary syndrome (hps) and hemorrhagic fever with renal syndrome (hfrs) are severe diseases associated with hantavirus infection. high levels of virus replication occur in microvascular endothelial cells but without a virus-induced cytopathic effect. however, virus infection results in microvascular leakage, which is the hallmark of these diseases. ve-cadherin is a major component of adherens junctions, and its interaction with the vascular endothelial growth factor (vegf) receptor, ...201020810734
hantavirus pulmonary syndrome coexistent with dengue.dengue is an arthropod-borne disease caused by viruses of flaviviridae family. it poses a major public health burden in tropical and sub-tropical regions. clinical features of dengue vary from a mild flu-like disease and rash, to a potentially lethal haemorrhagic fever or shock syndrome. hantavirus pulmonary syndrome is a rodent-born disease emerging in the american continent and is caused by viruses of the bunyaviridae family. potential reservoirs of these agents were described in brazilian cen ...201021302604
concomitant influence of helminth infection and landscape on the distribution of puumala hantavirus in its reservoir, myodes glareolus.puumala virus, the agent of nephropathia epidemica (ne), is the most prevalent hantavirus in europe. the risk for human infection seems to be strongly correlated with the prevalence of puumala virus (puuv) in populations of its reservoir host species, the bank vole myodes glareolus. in humans, the infection risks of major viral diseases are affected by the presence of helminth infections. we therefore proposed to analyse the influence of both helminth community and landscape on the prevalence of ...201121303497
genetic diversity of imjin virus in the ussuri white-toothed shrew (crocidura lasiura) in the republic of korea, 2004-2010.recently, imjin virus (mjnv), a genetically distinct hantavirus, was isolated from lung tissues of the ussuri white-toothed shrew (crocidura lasiura) captured near the demilitarized zone in the republic of korea. to clarify the genetic diversity of mjnv, partial m- and l-segment sequences were amplified from lung tissues of 12 of 37 (32.4%) anti-mjnv igg antibody-positive ussuri white-toothed shrews captured between 2004 and 2010. a 531-nucleotide region of the m segment (coordinates 2,255 to 2, ...201121303516
[bilateral acute angle-closure glaucoma due to an infection with hantavirus].a poor general condition of patients with hemorrhagic fever and elevated creatinine should raise suspicion of a systemic infection with hantavirus. this can often also cause ocular changes. above all, changes of intraocular pressure, in our case bilateral acute angle-closure glaucoma, due to edema and hemorrhage in the ciliary body result in anterolateral rotation of the iris-lens diaphragm with closure of the chamber angle. it can also cause a transient myopia, and intraretinal hemorrhages can ...201121327947
high activity of indoleamine 2,3-dioxygenase is associated with renal insufficiency in puumala hantavirus induced nephropathia epidemica.nephropathia epidemica (ne) is a hemorrhagic fever with renal syndrome caused by puumala hantavirus. the severity of ne varies greatly. the aim of the present study was to evaluate whether serum indoleamine 2,3-dioxygenase (ido) activity is associated with the severity of ne. a prospectively collected cohort of 102 consecutive patients with acute serologically confirmed ne was examined. serum kynurenine, tryptophan, creatinine, crp, and blood cell count were measured for up to 5 consecutive days ...201121328391
rodent community structure and andes virus infection in sylvan and peridomestic habitats in northwestern patagonia, argentina.modifications of natural habitat in peridomestic rural areas could affect original rodent community composition, diversity, and evenness. in zoonoses such as hantavirus pulmonary syndrome, the presence of a diverse community can dilute the impact of the principal reservoir, reducing risk to humans. the goal of this study was to examine rodent community composition, abundance of andes virus (andv) host (oligoryzomys longicaudatus), andv prevalence, and temporal variability associated with rural p ...201121332352
environmental risk factors for haemorrhagic fever with renal syndrome in a french new epidemic area.summaryin france, haemorrhagic fever with renal syndrome (hfrs) is endemic along the belgian border. however, this rodent-borne zoonosis caused by the puumala virus has recently spread south to the franche-comté region. we investigated the space-time distribution of hfrs and evaluated the influence of environmental factors that drive the hantavirus reservoir abundance and/or the disease transmission in this area. a scan test clearly indicated space-time clustering, highlighting a single-year (20 ...201120822577
hantavirus protein interactions regulate cellular functions and signaling responses.rodent-borne pathogenic hantaviruses cause two severe and often lethal zoonotic diseases: hemorrhagic fever with renal syndrome (hfrs) in eurasia and hantavirus cardiopulmonary syndrome (hcps) in the americas. currently, no us fda-approved therapeutics or vaccines are available for hfrs/hcps. infections with hantaviruses are not lytic, and it is currently not known exactly why infections in humans cause disease. a better understanding of how hantaviruses interfere with normal cell functions and ...201121171876
development and application of a flow cytometric potency assay for dna vaccines.we have developed a rapid, reliable, and sensitive quantitative flow cytometric assay to measure the in vitro potency and stability of dna vaccines to be delivered either by particle-mediated epidermal delivery (pmed) or by electroporation. the method involves transfecting cells with test dna and comparing the measured antigen expression to that generated with expression from known quantities of reference material dna. the assay was adapted for performance under good laboratory practice (glp) gu ...201121219978
specific humoral reaction of hemorrhagic fever with renal syndrome (hfrs) patients in china to recombinant nucleocapsid proteins from european hantaviruses.hemorrhagic fever with renal syndrome (hfrs) is endemic in east asia and europe. this study was initiated to investigate the reactivity of antibodies in sera of chinese hfrs patients with the recombinant nucleocapsid proteins (rnps) of hantaan virus (htnv), dobrava-belgrade virus (dobv), and puumala virus (puuv), which are the prevalent hantavirus strains in europe. forty-eight pairs of acute and convalescent sera were collected from hfrs patients in hubei, china (1985-2002) and tested by indire ...201121222012
time to revise the paradigm of hantavirus syndromes? hantavirus pulmonary syndrome caused by european hantavirus.hantaviruses have previously been recognised to cause two separate syndromes: hemorrhagic fever with renal syndrome in eurasia, and hantavirus pulmonary syndrome (hps) in the americas. however, increasing evidence suggests that this dichotomy is no longer fruitful when recognising human hantavirus disease and understanding the pathogenesis. herein are presented three cases of severe european puumala hantavirus infection that meet the hps case definition. the clinical and pathological findings we ...201121234633
hantavirus pulmonary syndrome: encephalitis caused by virus andes.hemorrhagic fever with renal syndrome and hantavirus pulmonary syndrome (hps) are rodent-borne emerging diseases caused by members of the genus hantavirus, family bunyaviridae. some species of hantavirus may cause encephalitis, but this is the first report in andes virus associated to hps.201121240581
interview with pedro fernando da costa vasconcelos, md, phd. interview by vicki glaser. 201121261512
hantavirus infection during a stay in a mountain hut in northern slovakia.hantaviruses in europe cause human hemorrhagic fever with renal syndrome (hfrs) with various degree of severity. the most severe form is caused by the dobrava/belgrade virus (dobv), associated with the rodent apodemus flavicollis. during the last decade cases of infection caused by dobv have been reported in central europe. the present study is a report on two czech patients with severe hfrs who were infected during their stay in a mountain hut in northern slovakia. the two patients, combined wi ...201121264871
serological evidence of thailand virus-related hantavirus infection among suspected leptospirosis patients in kandy, sri lanka.a cross-sectional study was undertaken to determine the current prevalence of leptospirosis and hantaviral infections, and the socio-demographic characteristics and risk factors of infected patients, in kandy, sri lanka. this report discusses the serological evidence of hantavirus infections among 105 suspected leptospirosis patients, 8 of whom had hantavirus antibodies. serotyping elisa showed that these 8 patients had high optical density values for thailand virus. most of the sera showed that ...201121266762
delayed density-dependent prevalence of sin nombre virus infection in deer mice (peromyscus maniculatus) in central and western montana.understanding how transmission of zoonoses takes place within reservoir populations, such as sin nombre virus (snv) among deer mice (peromyscus maniculatus), is important in determining the risk of exposure to other hosts, including humans. in this study, we examined the relationship between deer mouse populations and the prevalence of antibodies to snv, a system where the effect of host population abundance on transmission is debated. we examined the relationship between abundance of deer mice ...201121269997
genetic evidence of hantavirus infections in wild rodents from northwestern colombia.this report builds on recent serological evidence for the presence of hantavirus in northern colombia by providing sequence-specific and phylogenetic data of hantavirus infections in wild rodents. from august 2007 to august 2008, 354 rodent specimens representing four families were collected in the northwestern antioquia region of colombia. antibodies reactive to sin nombre virus and maciel virus antigens by igg enzyme-linked immunosorbent assay were found in 15 of 109 (14%) cherries cane rats ( ...201121284514
inactivation of hantaviruses by n-ethylmaleimide preserves virion integrity.thiol groups of cysteine residues are crucial for the infectivity of various enveloped viruses, but their role in the infectivity of viruses of the family bunyaviridae has thus far not been studied. this report shows that thiol groups are essential to the infectivity of hantaviruses. alkylation of the thiol functional groups using the membrane-permeable compound n-ethylmaleimide (nem) and membrane-impermeable compound 5,5'-dithio-bis-(2-nitrobenzoic acid) (dtnb) showed nem to be a highly effecti ...201121289161
hantavirus infection in istanbul, turkey. 201121291612
genetic detection of dobrava/belgrade virus, bulgaria. 201121291615
characterization of the interaction between hantavirus nucleocapsid protein (n) and ribosomal protein s19 (rps19).hantaviruses, members of the bunyaviridae family, are negative-stranded emerging rna viruses and category a pathogens that cause serious illness when transmitted to humans through aerosolized excreta of infected rodent hosts. hantaviruses have evolved a novel translation initiation mechanism, operated by nucleocapsid protein (n), which preferentially facilitates the translation of viral mrnas. n binds to the ribosomal protein s19 (rps19), a structural component of the 40 s ribosomal subunit. in ...201121296889
seroepidemiological survey of hantavirus infection in healthy people in vallès occidental, barcelona.hantaviruses are the etiological agents of hemorrhagic fever with renal syndrome in europe and asia, and hantavirus pulmonary syndrome in america. approximately 150,000 cases are reported annually worldwide. in spain, some hantavirus infection cases have been described. besides, rodents that have been described as hantavirus reservoirs are present. the aim of the present study was to determinate the seroprevalence of hantavirus in humans in the northeast of spain.201121417923
comparison of hantaan and seoul viral infections among patients with hemorrhagic fever with renal syndrome (hfrs) in heilongjiang, china.hemorrhagic fever with renal syndrome (hfrs) is a serious public health problem in china, and is primarily caused by either the hantaan virus (htnv) or seoul virus (seov) strains. however, the causative hantavirus has only been definitively identified in a few hfrs cases, and detailed comparisons of patient data for the 2 strains are limited.201121428852
presence of activated airway t lymphocytes in human puumala hantavirus disease.hantaviruses cause two clinical syndromes: hemorrhagic fever with renal syndrome (hfrs) and hantavirus pulmonary syndrome (hps). the clinical spectrum in hfrs also often involves respiratory symptoms. as information about the pulmonary pathogenesis in hfrs is limited, we aimed to further study the local airway immune response in the lower airways.201121436245
prevalence of hantavirus infection in wild rodents from five provinces in korea, 2007.hemorrhagic fever with renal syndrome (hfrs) is an infectious disease caused by hantaviruses of the family bunyaviridae. among them, hantaan virus (htnv) is most widely distributed in korea. the striped field mouse, apodemus agrarius, is the natural host of htnv in rural korea. we trapped 766 small mammals of three species (1 eothenomys regulus, 13 crocidura suaveolens, and 752 apodemus agrarius) in five provinces in korea from january to december 2007. we tested 542 rodent sera for htnv antibod ...201121441196
detection of hantaviruses in brazilian rodents by sybr-green-based real-time rt-pcr.current knowledge of the pathogenic hantavirus indicates that wild rodents are its primary natural reservoir. specific primers to detect the presence of viral genomes were developed using an sybr-green-based real-time rt-pcr protocol. one hundred sixty-four rodents native to the atlantic forest biome were captured in são paulo state, brazil, and their tissues were tested. the presence of hantavirus rna was detected in sixteen rodents: three specimens of akodon montensis, three of akodon cursor, ...201121442233
recent advances in hantavirus molecular biology and disease.hantaviruses are emerging zoonotic pathogens that belong to the bunyaviridae family. they have been classified as category a pathogens by cdc (centers for disease control and prevention). hantaviruses pose a serious threat to human health because their infection causes two highly fatal diseases, hemorrhagic fever with renal syndrome (hfrs) and hantavirus cardiopulmonary syndrome (hcps). these pathogens are transmitted to humans through aerosolized excreta of their infected rodent hosts. hantavir ...201121459193
epidemiological study on hemorrhagic fever with renal syndrome in flood areas.to investigate the infection of hemorrhagic fever with renal syndrome (hfrs) in host animals and inapparent infection of hfrs in general population in dongting lake areas after floods.201121464543
serosurvey of hantavirus infection in humans in the border region between brazil and argentina.according to reports by the ministry of health, in the far western region of the state of santa catarina, there have been no reports of hantavirus pulmonary syndrome, a zoonotic disease transmitted by feces of infected rodents. a seroepidemiological study of residents of this region, was conducted, with the aim of determining the presence of hantavirus infections. a total of 340 volunteers of both genus, from the towns of belmonte and paraíso, were studied.201121468477
complement activation in puumala hantavirus infection correlates with disease severity.abstract introduction. hantaviruses are important human pathogens that cause clinical diseases characterized by renal and cardiopulmonary manifestations. their pathogenesis is currently poorly understood. we have studied the role of the complement system in the pathogenesis of puumala (puuv) hantavirus infection. material and methods. we studied the activation of complement by measuring the terminal complement complex sc5b-9 and complement component c3 and c4 levels in patients with acute puuv i ...201121495786
viral infections in workers in hospital and research laboratory settings: a comparative review of infection modes and respective biosafety aspects.to compare modes and sources of infection and clinical and biosafety aspects of accidental viral infections in hospital workers and research laboratory staff reported in scientific articles.201121497126
structural characterization of the crimean-congo hemorrhagic fever virus gn tail provides insight into virus assembly.the rna virus that causes the crimean congo hemorrhagic fever (cchf) is a tick-borne pathogen of the nairovirus genus, family bunyaviridae. unlike many zoonotic viruses that are only passed between animals and humans, the cchf virus can also be transmitted from human to human with an overall mortality rate approaching 30%. currently, there are no atomic structures for any cchf virus proteins nor for any nairovirus proteins. a critical component of the virus is the envelope gn glycoprotein, which ...201121507948
biogeographic and ecological regulation of disease: prevalence of sin nombre virus in island mice is related to island area, precipitation, and predator richness.the relative roles of top-down and bottom-up forces in affecting disease prevalence in wild hosts is important for understanding disease dynamics and human disease risk. we found that the prevalence of sin nombre virus (snv), the agent of a severe disease in humans (hantavirus pulmonary syndrome), in island deer mice from the eight california channel islands was greater with increased precipitation (a measure of productivity), greater island area, and fewer species of rodent predators. in findin ...201121508614
human pathogenic hantaviruses and prevention of infection.hantaviruses are emerging viruses which are hosted by small mammals. when transmitted to humans, they can cause two clinical syndromes, hemorrhagic fever with renal syndrome or hantavirus cardiopulmonary syndrome. the review compiles the current list of hantaviruses which are thought to be pathogenic in humans on the basis of molecular or at least serological evidence. whereas induction of a neutralizing humoral immune response is considered to be protective against infection, the dual role of c ...201121508676
platelet ligands and adamts13 during puumala hantavirus infection and associated thrombocytopenia.we aimed here to elucidate the role of adhesive platelet ligands and endothelial involvement during the acute phase of puumala hantavirus (puuv) infection. nineteen hospital-treated patients with serologically confirmed diagnosis of acute puuv infection were included. patient charts were reviewed for clinical and basic laboratory data. plasma levels of von willebrand factor antigen (vwf: ag), ristocetin cofactor (vwf: rco), factor viii (fviii: c) and a disintegrin and metalloproteinase with a th ...201121508829
the delicate pygmy rice rat (oligoryzomys delicatus) is the principal host of maporal virus (family bunyaviridae, genus hantavirus).abstract choclo virus (chov) and maporal virus (mapv) are enzootic in panama and western venezuela, respectively. the results of previous studies suggested that the fulvous pygmy rice rat (oligoryzomys fulvescens) is the principal host of both viruses. the results of an analysis of nucleotide sequence data in this study indicated that the rodent associated with chov is the costa rican pygmy rice rat (oligoryzomys costaricensis) and that the rodent associated with mapv is the delicate pygmy rice ...201121548760
maporal virus as a surrogate for pathogenic new world hantaviruses and its inhibition by favipiravir.pathogenic hantaviruses geographically distributed in the old world cause haemorrhagic fever with renal syndrome (hfrs), whereas new world hantaviruses are the aetiological agents of hantavirus cardiopulmonary syndrome (hcps). ribavirin, a drug associated with toxicities, is presently indicated for treatment of hfrs, whereas treatment of the more frequently lethal hcps is limited to supportive care. because of the need for safe and effective antivirals to treat severe hantaviral infections, we e ...201121566265
expression of recombinant araraquara hantavirus nucleoprotein in insect cells and its use as an antigen for immunodetection compared to the same antigen expressed in escherichia coli.abstract: background: antigens for hantavirus serological tests have been produced using dna recombinant technology for more than twenty years. several different strategies have been used for that purpose. all of them avoid the risks and difficulties involved in multiplying hantavirus in the laboratory. in brazil, the araraquara virus is one of the main causes of hantavirus cardio-pulmonary syndrome (hcps). methods. in this investigation, we report the expression of the n protein of the araraqua ...201121569341
infection of human monocyte-derived dendritic cells by andes hantavirus enhances pro-inflammatory state, the secretion of active mmp-9 and indirectly enhances endothelial permeability.abstract:201121569520
detection of dobrava-belgrade hantavirus using recombinant-nucleocapsid-based enzyme-linked immunosorbent assay and sybr green-based real-time reverse transcriptase-polymerase chain reaction.dobrava (dobv) hantaviruses belong to the genus hantavirus, family bunyaviridae, and are carried by yellow-necked and striped field mice. the goal of this study was to detect dobv using serological and genetic methods in apodemus rodents in hungary and in northern croatia. during the study period, a total of 125 apodemus sp. (67 a. agrarius, 58 a. flavicollis) were tested for the presence of hantaviruses, and 21 rodents (17%) were positive by rrt-pcr and/or elisa. we conclude that the prevalence ...201121573689
phylogenetic analysis of puumala virus subtype bavaria, characterization and diagnostic use of its recombinant nucleocapsid protein.puumala virus (puuv) is the predominant hantavirus species in germany causing large numbers of mild to moderate cases of haemorrhagic fever with renal syndrome (hfrs). during an outbreak in south-east germany in 2004 a novel puuv subtype designated bavaria was identified as the causative agent of hfrs in humans [1]. here we present a molecular characterization of this puuv strain by investigating novel partial and almost entire nucleocapsid (n) protein-encoding small (s-) segment sequences and p ...201121598005
pulmonary high-resolution computed tomography findings in nephropathia epidemica.purpose: to evaluate lung high-resolution computed tomography (hrct) findings in patients with puumala hantavirus-induced nephropathia epidemica (ne), and to determine if these findings correspond to chest radiograph findings. materials and methods: hrct findings and clinical course were studied in 13 hospital-treated ne patients. chest radiograph findings were studied in 12 of them. results: twelve patients (92%) showed lung parenchymal abnormalities in hrct, while only 8 had changes in their c ...201121600717
serum levels of inflammatory and regulatory cytokines in patients with hemorrhagic fever with renal syndrome.abstract: background: hantaviruses are the causative agents of two zoonotic diseases: hemorrhagic fever with renal syndrome (hfrs) and hantavirus cardiopulmonary syndrome (hcps). the pathogenesis of hfrs is poorly understood. however, it has been suggested that immune mechanisms, including cytokines, might have an important role in hfrs pathogenesis. thus, the aim of our study was to investigate cytokine profiles in serum samples of hfrs patients from slovenia and explore a possible correlation ...201121605369
environmental factors affecting transmission risk for hantaviruses in forested portions of southern brazil.using ecological niche modeling approaches, we assessed suites of environmental factors to identify areas of transmission risk in forested regions of southern brazil. we studied all officially confirmed cases from the epidemiological surveillance system of the brazilian health ministry from atlantic forest and araucaria forest areas of southern brazil (n=264), during 1993-2008. among climate-related influences associated with hantavirus cases, winter precipitation and high photosynthetic mass (e ...201121605537
seroprevalence study in forestry workers of a non-endemic region in eastern germany reveals infections by tula and dobrava-belgrade hantaviruses.highly endemic and outbreak regions for human hantavirus infections are located in the southern, southeastern, and western parts of germany. the dominant hantavirus is the bank vole transmitted puumala virus (puuv). in the eastern part of germany, previous investigations revealed tula virus (tulv) and dobrava-belgrade virus (dobv) infections in the respective rodent reservoirs. here, we describe a seroprevalence study in forestry workers from brandenburg, eastern germany, using igg elisa and imm ...201121611907
glomerulonephritis emerging shortly after puumala hantavirus infection: a report on 7 patients.aims: nephropathia epidemica (ne) is mild type of hemorrhagic fever caused by puumala (puu) hantavirus. renal biopsy typically shows acute tubulointerstitial nephritis and complete recovery is the usual outcome. we previously described 5 patients with membranoproliferative glomerulonephritis (mpgn) after acute ne. we now report on 7 more patients who developed biopsy-confirmed glomerulonephritis (gn) during the convalescent phase of ne. material and methods: we present case histories of 7 patien ...201121612760
sex differences in the incidence and case fatality rates from hemorrhagic fever with renal syndrome in china, 2004-2008.background. differences between male and female individuals in response to infectious diseases are an overlooked global health problem. methods. the relationship between sex and disease outcome was examined in populations of patients with hemorrhagic fever with renal syndrome (hfrs) in mainland china, where most cases of hantavirus exposure occur. hfrs in china is diagnosed on the basis of symptoms and is confirmed with serological testing. the geographical distribution, incidence, and case fata ...201121628481
shared ancestry between a newfound mole-borne hantavirus and hantaviruses harbored by cricetid rodents.discovery of genetically distinct hantaviruses in multiple species of shrews (order soricomorpha, family soricidae) and moles (family talpidae) contests the conventional view that rodents (order rodentia, family muridae and cricetidae) are the principal reservoir hosts and suggests that the evolutionary history of hantaviruses is far more complex than previously hypothesized. we now report on rockport virus (rkpv), a hantavirus identified in archival tissues of the eastern mole (scalopus aquatic ...201121632770
biodiversity and leptospirosis risk: a case of pathogen regulation?well balanced ecosystems have an essential role in disease regulation, and consequently their correct functioning is increasingly recognised as imperative for maintaining human health. disruptions to ecosystems have been found to increase the risk of several diseases, including hantavirus, lyme disease, ross river virus, malaria and ciguatera fish poisoning. leptospirosis is a globally important emerging zoonosis, caused by spirochaete bacteria, borne by many mammalian hosts, and also transmitte ...201121652151
hantavirus pulmonary syndrome: when should you consider this diagnosis? 201121670936
puumala virus infection in syrian hamsters (mesocricetus auratus) resembling hantavirus infection in natural rodent hosts.the mechanism of hantavirus persistent infection in natural hosts is poorly understood due to a lack of laboratory animal models. herein, we report that syrian hamsters (mesocricetus auratus) infected with puumala virus (puuv) at 4weeks old show persistent infection without clinical symptoms for more than 2months. igg and igm antibodies against the viral nucleocapsid protein and neutralizing antibody were first detectable at 14days postinoculation (dpi) and maintained through 70dpi. viral rna wa ...201121672562
the cytoplasmic tail of hantavirus gn glycoprotein interacts with rna.we recently characterized the interaction between the intraviral domains of envelope glycoproteins (gn and gc) and ribonucleoprotein (rnp) of puumala and tula hantaviruses (genus hantavirus, family bunyaviridae). herein we report a direct interaction between spike-forming glycoprotein and nucleic acid. we show that the envelope glycoprotein gn of hantaviruses binds genomic rna through its cytoplasmic tail (ct). the nucleic acid binding of gn-ct is unspecific, as demonstrated by interactions with ...201121807393
a new subtype of thottapalayam virus carried by the asian house shrew (suncus murinus) in china.recently, many novel hantavirus species carried by insectivore had been found. in order to know whether the insectivore-associated hantaviruses exist in china, asian house shrew (suncus murinus) were analyzed for the presence of hantaviruses. 362 asian house shrews were captured in wenzhou of zhejiang province. hantavirus-specific rna was detected by rt-pcr in lung tissue samples of six shrews. the complete hantavirus s and m segment sequences and also partial l segment sequences were successful ...201121801855
pygmy rice rat as potential host of castelo dos sonhos hantavirus.to study the dynamics of wild rodent populations and identify potential hosts for hantavirus, we conducted an eco-epidemiologic study in campo novo do parecis, mato grosso state, brazil. we detected and genetically characterized castelo dos sonhos virus found in a species of pygmy rice rat (oligoryzomys utiaritensis).201121801642
molecular evolution of azagny virus, a newfound hantavirus harbored by the west african pygmy shrew (crocidura obscurior) in cote d'ivoire.abstract: background: tanganya virus (tgnv), the only shrew-associated hantavirus reported to date from sub-saharan africa, is harbored by the therese's shrew (crocidura theresae), and is phylogenetically distinct from thottapalayam virus (tpmv) in the asian house shrew (suncus murinus) and imjin virus (mjnv) in the ussuri white-toothed shrew (crocidura lasiura). the existence of myriad soricid-borne hantaviruses in eurasia and north america would predict the presence of additional hantaviruses ...201121798050
longitudinal analysis of the human t cell response during acute hantavirus infection.longitudinal studies of t cell immune responses during viral infections in humans are essential for our understanding of how effector t cell responses develop, clear infection, and provide long-lasting immunity. here, following an outbreak of a puumala hantavirus infection in the human population, we longitudinally analyzed the primary cd8 t cell response in infected individuals from the first onset of clinical symptoms until viral clearance. a vigorous cd8 t cell response was observed early fol ...201121795350
[investigation on the natural infectious status of hantaviruses among small mammals in longquan city, zhejiang province].to investigate the situation of the natural infection of hantaviruses (hv) in small mammals and to provide evidence for the control and prevention of hemorrhagic fever with renal syndrome (hfrs) in longquan area, zhejiang province.201121781480
hla associated hemorrhagic fever with renal syndrom disease progression in slovenian patients.mhc class i and class ii genes regulate the balance between appropriate aggressive responses and invading pathogens while minimising the destruction of host tissue. several studies have shown that in hfrs patients the disease outcome is determined by a complex interaction between the virus, immunopathologic and human genetic factors. in slovenia the severity of the disease caused by puuv is significantly lower than that of hfrs due to dobv. we have determined 23 different hla-b and 12 different ...201121775516
pathogenic old world hantaviruses infect renal glomerular and tubular cells and induce disassembling of cell-to-cell contacts.viral hemorrhagic fevers are characterized by enhanced permeability. one of the most affected target organs of hantavirus-induced hemorrhagic fever with renal syndrome is the kidney, and an infection often results in acute renal failure. to study the underlying cellular effects leading to kidney dysfunction, we infected human renal cell types in vitro that are critical for the barrier functions of the kidney and examined kidney biopsies of hantavirus-infected patients. we analyzed the infection ...201121775443
t cells are not required for pathogenesis in the syrian hamster model of hantavirus pulmonary syndrome.andes virus (andv) is associated with a lethal vascular leak syndrome in humans termed hantavirus pulmonary syndrome (hps). in hamsters, andv causes a respiratory distress syndrome closely resembling human hps. the mechanism for the massive vascular leakage associated with hps is poorly understood; however, t cell immunopathology has been implicated based on circumstantial and corollary evidence. here, we show that following andv challenge, hamster t cell activation corresponds with the onset of ...201121775442
hantavirus pulmonary syndrome, united states, 1993-2009.hantavirus pulmonary syndrome (hps) is a severe respiratory illness identified in 1993. since its identification, the centers for disease control and prevention has obtained standardized information about and maintained a registry of all laboratory-confirmed hps cases in the united states. during 1993-2009, a total of 510 hps cases were identified. case counts have varied from 11 to 48 per year (case-fatality rate 35%). however, there were no trends suggesting increasing or decreasing case count ...201121762572
dynamics of hantavirus infection in peromyscus leucopus of central pennsylvania.abstract hantaviruses are distributed throughout the united states and are the etiologic agents for hantavirus pulmonary syndrome and hemorrhagic fever with renal syndrome. hantavirus genotypes and epidemiologic patterns vary spatially across the united states. while several longitudinal studies have been performed in the western united states, little is known about the virus in the eastern united states. we undertook a longitudinal study of hantaviruses in the primary rodent reservoir host in c ...201121756028
spatial structure of rodent populations and infection patterns of hantavirus in seven villages of shandong province from february 2006 to january 2007.hemorrhagic fever with renal syndrome (hfrs) is endemic in junan county, shandong province, china. we conducted geographic information system (gis)-based spatial analysis with the objective of estimating the spatial distribution of rodent populations and their hantavirus infection patterns, to describe the spatial relationships of hantavirus strains in small ecological areas and to identify key areas in endemic areas of hfrs for future public health planning and resource allocation.201121740769
landscape genetics highlights the role of bank vole metapopulation dynamics in the epidemiology of puumala hantavirus.rodent host dynamics and dispersal are thought to be critical for hantavirus epidemiology as they determine pathogen persistence and transmission within and between host populations. we used landscape genetics to investigate how the population dynamics of the bank vole myodes glareolus, the host of puumala hantavirus (puuv), vary with forest fragmentation and influence puuv epidemiology. we sampled vole populations within the ardennes, a french puuv endemic area. we inferred demographic features ...201121819469
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