| 词条 | Astrovirus | ||||||||||||||||||||||||||||||||||||||||||
| 释义 |
| image = Astrovirus 4.jpg | image_caption = Electron micrograph of Astroviruses | taxon = Astroviridae | subdivision_ranks = Genera and species | subdivision =Genus: Avastrovirus Avian nephritis virus Chicken astrovirus Duck astrovirus Turkey astrovirusGenus: Mamastrovirus Bovine astrovirus Capreolus capreolus astrovirus Feline astrovirus Human astrovirus Ovine astrovirus Mink astrovirus Porcine astrovirus }}Astroviruses are a type of virus that was first discovered in 1975 using electron microscopes following an outbreak of diarrhea in humans.[1] In addition to humans, astroviruses have now been isolated from numerous mammalian animal species (and are classified as genus Mammoastrovirus) and from avian species such as ducks, chickens, and turkey poults (classified as genus Avastrovirus). Astroviruses are 28–35 nm diameter, icosahedral viruses that have a characteristic five- or sixpointed star-like surface structure when viewed by electron microscopy. Along with the Picornaviridae and the Caliciviridae, the Astroviridae comprise a third family of nonenveloped viruses whose genome is composed of plus-sense, single-stranded RNA.[2] Astrovirus has a non-segmented, single stranded, positive sense RNA genome within a non-enveloped icosahedral capsid.[3] Human astroviruses have been shown in numerous studies to be an important cause of gastroenteritis in young children worldwide.[2] Signs and symptoms in humansMembers of a relatively new virus family, the astroviridae, astroviruses are now recognised as a cause of gastroenteritis in children, whose immune systems are underdeveloped, and elderly adults, whose immune systems are generally somewhat compromised. Presence of viral particles in fecal matter and in epithelial intestinal cells indicate that the virus replicates in the gastrointestinal tract of humans.[4] The main symptoms are diarrhoea, followed by nausea, vomiting, fever, malaise and abdominal pain. Some research studies have shown that the incubation period of the disease is approximately three to four days. Astrovirus infection is not usually a severe situation and only in some rare cases leads to dehydration. The severity and variation in symptoms correlates with the region the case develops in. This could be due to climatic factors influencing the life cycle or transmission method for that particular strain of Astrovirus. Malnutrition and immunodeficiency tend to exacerbate the condition, leading to more severe cases or secondary conditions that could require hospital care.[5] Otherwise, infected people do not need hospitalization because symptoms will reduce by themselves, after 2 to 4 days.[6] DiagnosisElectron microscopy, enzyme-immunoassay (ELISA), immunofluorescence, and polymerase chain reaction have all been used for detecting virus particle, antigens or viral nucleic acid in the stools of infected people.[7] A method using real-time RT-PCR, which can detect all human astrovirus genotypes, has been reported.[8]PathogenesisAstroviruses cause gastroenteritis by causing destruction of the intestinal epithelium, leading to the inhibition of usual absorption mechanism, loss of secretory functions, and decrease in epithelial permeability in the intestines. Inflammatory responses were seen to not affect astrovirus pathogenesis.[9] EpidemiologyA study of intestinal disease in the UK, published in 1999, determined incidence as 3.8/1000 patient years in the community (95% CI, range 2.3–6.4), the fourth most common known cause of viral gastroenteritis.[10] Studies in the USA have detected astroviruses in the stools of 2–9% of children presenting symptoms; illness is most frequent in children younger than two years, although outbreaks among adults and the elderly have been reported. Early studies carried out in Glasgow demonstrated that a significant proportion of babies excreting virus particles, 12%, did not exhibit gastrointestinal symptoms; seroprevalence studies carried out in the US have shown that 90% of children have antibody to HastV-1 by age 9, suggesting that (largely asymptomatic) infection is common. There is, as with most viral causes of gastroenteritis, a peak of incidence in the winter.[11] Humans of all ages are susceptible to astrovirus infection, but children, the elderly, and those that are immunocompromised are most prone. The majority of children have acquired astrovirus antibodies by the age of 5 and, looking at the pattern of disease, it suggests that antibodies provide protection through adult life, until the antibody titre begins to decline later in life.[12][13] Astroviruses are associated with 5–9% of cases of gastroenteritis in young children.[14] The occurrence of astrovirus infection varies depending on the season. In temperate climates infection is highest during winter months. This is in contrast to tropical regions where prevalence is highest during the rainy season. This seasonal distribution of infection in temperate climates is rather puzzling. But the seasonal distribution in tropical climates can be explained by the effect of the rain particularly on breakdown of sanitation in developing countries.[11] The main mode of astrovirus transmission is by contaminated food and water. Young children in childcare backgrounds or adults in military barracks are most likely to develop the disease. Timeline1975: Appleton and Higgins first discovered astrovirus in stool samples of children suffering from gastroenteritis by using electron microscopy (EM) 1975: Madeley and Cosgrove named the 20-30 nm viral particle Astrovirus based on the star-like EM (electron microscopy) appearance 1976-1992: Lee and Kurtz serotyped 291 astrovirus stool samples in Oxford; discovered serotypes 6 and 7 1981: Lee and Kurtz were able to grow astrovirus in tripsin-dependent tissue culture by using human embryo kidney cells (HEK) 1985: Lee and Kurtz discover two serotypes of astrovirus that are used to type 13 strains of community-acquired astrovirus 1987: Gray et al. discovered that a 22 day long gastroenteritis outbreak in an elderly home was caused by astrovirus type 1 and calicivirus 1988: Hermann and Hudson use antigen characterization of HEK grown astroviruses to develop monoclonal antibodies 1992: Cruz et al. analyzed 5,000 stool samples 7.5% of the diarrheal diseases found in Guatemalan ambulatory rural children were caused by astroviruses 1993: Jiang et al. sequence astrovirus RNA and determine the presence of three ORFs and ribosomal frameshifting 1993: Monroe et al. classify subgenomic data for astrovirus, providing support for astrovirus to be classified as a viral family 1994: Oishi et al. determine astrovirus as the main cause of gastroenteritis in schools in Katano City, Osaka, Japan 1995: Bjorkholm elt al. conducted a clinical study, and 78-year-old male Waldenström's macroglobulinemia patient with astrovirus-associated gastroenteritis was successfully treated with intravenous immunoglobulin 1995: Jonassen et al. uses PCR to detect all known serotypes (7) of astrovirus 1995: In their sixth report, ICTV establishes Astroviridae as a viral family 1996: Glass et al. states an epidemiological shift regarding astrovirus due to improvements in RT-PCT (reverse transcription PCR), monoclonal antibodies, and enzyme immunoassays (EIA); astroviruses are now considered one of the main causes of diarrheal disease worldwide 1996: Palombo and Bishop the epidemiology of astrovirus infections in children suffering from gastroenteritis in Melbourne, Australia (data collected include total incidence, genetic diversity, serotype characterization) 1998: Unicomb et al. conduct a clinical study in Bangladesh and conclude astrovirus infections involving nosocomial, acute, and persistent diarrheal diseases 1998: Gaggero et al. identify human astrovirus type 1 to be the main cause of acute gastroenteritis in Chilean children 1999: Bon et al. discover astrovirus in a gastroenteritis outbreak in Dijon, France 2001: Dennehy et al. collected stool samples from hospitalized children suffering from acute gastroenteritis; astrovirus was determined the second leading cause of gastroenteritis after rotavirus 2002: Guix et al. completes an epidemiological study on the presence of astrovirus in Barcelona, Spain; the total incidence of astrovirus in 2,347 samples was 4.95 with a peak in the number of cases in the winter 2003: Basu et al. discovered astrovirus in 2.7% of stool samples collected from 346 children suffering from gastroenteritis in Gaborone, Botswana 2009: Finkbeiner et al. used Sanger sequencing to discover a novel astrovirus in stool samples from children suffering from an acute gastroenteritis outbreak at a childcare center 2009: Using RT-PCR, Kapoor et al. discover novel astrovirus strains HMOAstV species A, B, C which are very similar to astroviruses found in mink and ovine species; this showed that the virus may have the ability to jump species PreventionInactivated vaccines are in use for certain strains of Chicken Astrovirus (CastV). TreatmentAstrovirus ImmunoglobulinIn a study by Bjorkholm et al., a 78-year-old patient diagnosed with Waldenstrom's macroglobulinemia was given 0.4 g/kg of astrovirus immunoglobulin for four days, and the symptoms dissolved leading to a full recovery from astrovirus; however, further testing has yet to be completed.[15] Achyrocline bogotensis Antiviral TherapyIn a study by Tellez et al., extracts from a plant Achyrocline bogotensis was used to develop an antiviral therapy for both rotavirus and astrovirus. Achyrocline bogotensis was commonly used for skin and urinary infections. Drug testing methodology involved application of the extract to cell for pre-treatment (blocking), direct viral activity (evidence of killing the virus), and treatment (a decrease in the viral load after an infection is established). The extract demonstrated direct viral activity by killing astroviruses directly and treatment by leading to a decrease in the viral load after an established infection. A pre-treatment effect was not evident during the experiment.[16] MicrobiologyTaxonomic structure-Group: ssRNA(+){{Collapsible list|title= Order: Unassigned|1={{Collapsible list| framestyle=border:none; padding:1.0em;|title=Family: Astroviridae |1={{hidden begin|title=Genus: Avastrovirus}}
|2={{hidden begin|title=Genus: Mamastrovirus}}
}} }}[17] The family Astroviridae contains two genera: Mamastroviruses which infect mammals and Avastroviruses which infect birds. In each genus, there are species of astroviruses, each named after the host in which they replicate. The astroviruses are further subclassified within each species into serotypes.[18] There are at least three genotypes of bovine astroviruses.[19] These appear to be related to the Capreolus capreolus astrovirus. Virus structureAstroviruses have a star-like appearance with five or six points. Their name is derived from the Greek word "astron" meaning star. They are non-enveloped RNA viruses with cubic capsids, approximately 28–35 nm in diameter.[20]
Human astrovirus structure: Human astroviruses are part of the Mammastrovirus genus and contains 8 serotypes. The human astrovirus capsid spikes have a distinct structure. The spike domain in particular has a 3-layered beta-sandwiches fold and a core, 6-stranded beta-barrel structure. The beta-barrel has a hydrophobic core. The triple-layered beta-sandwich is packed outside the beta-barrel. The spike also forms a dimer. This unique structure was found to be similar to the protein projections found on the capsid of the hepatitis E virus. The projection domain of the human astrovirus contains a receptor binding site for polysaccharides. The amino acid sequence of the astrovirus capsid protein does not have similar homology to other known viral proteins, but the closest would be hepatitis E virus.[22] Life cycleViral replication is cytoplasmic. Entry into the host cell is achieved by attachment to host receptors, which mediates endocytosis. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription, using an unknown model of subgenomic RNA transcription is the method of transcription. Translation takes place by -1 ribosomal frameshifting. Vertebrates serve as the natural host. Transmission routes are fecal-oral.[21]
GenomeAstroviruses have a genome composed of a single strand of positive sense RNA. The strand has a poly A tail at the 3' end, but no 5' cap. With the exclusion of polyadenylation at the 3' end, the genome is between 6.8–7.9 kb long. The genome is arranged into three open reading frames (ORFs), with an overlap of approximately 70 nucleotides between ORF1a and ORF1b. The remaining ORF is known as ORF2.[23] ORF2 encode the structural proteins, which are -at least- VP26, VP29 and VP32, the most antigenic and immunogenic of these being VP26. This protein is probably involved in the first steps of viral infection, being a key factor in the biological cycle of astroviruses.[24] The mutation rate has been estimated to be 3.7×10−3 nucleotide substitutions per site per year with the synonymous changes rate of 2.8×10−3 nucleotide substitutions per site per year.[25] EvolutionThe Astroviridae capsid is related to those of the Tymoviridae.[26] The non-structural region is related to the Potyviridae. It appears that this group of viruses may have arise at some point in the past as a result of recombination event between two distinct viruses and that this even occurred at the junction of the structural and non structural coding regions. Species infectedIn addition to humans, goats, cattle, pigs, wild boar, sheep, roe deer, bats, sea lions, rats, and mice are known to be infected with these viruses.[27][28][29] Recent findingsJanuary 24, 2017: Human astrovirus (particularly serotypes 1, 4, 6, and 8) were found in 4.2% of the samples collected from children suffering from acute gastroenteritis in Nara Prefecture, Japan.[30]February 2017: Cortez et al. conducted a retrospective study on persistent infections in pediatric oncology patients and determined human astrovirus to be the main cause of gastroenteritis in immunocompromised patients.[31]April 2017 (electronically published December 28, 2016): Bennett and Gunson developed a novel multiplex RT-PCR diagnostic technique to detect the presence of a variety of inflectional intestinal diseases (IID) including astrovirus, adenovirus, rotavirus, and sapovirus from stool samples.[32]December 2016: Yuan et al. discovered that the recovery rate for astroviruses was 8.24% for a novel centrifugal method developed to concentrate human enteroviruses from water samples.[33]December 18, 2016: Lum et al. demonstrated the capacity of human astrovirus (particularly Neuroinvasive astrovirus (VA1-HMO-C)) to become an emerging opportunistic infection. An 8-month-old bone marrow transplant patient died of VA1/HMO-C encephalitis following the transplant. The presence of VA1/HMO-C was confirmed after positive PCR test results.[34]References1. ^{{cite journal|vauthors=Madeley CR, Cosgrove BP |title=Letter: 28 nm particles in faeces in infantile gastroenteritis|journal=Lancet|volume=2|issue=7932|pages=451–2|year=1975|pmid=51251|doi=10.1016/S0140-6736(75)90858-2}} 2. ^1 {{cite journal |vauthors=Brown DW, Gunning KB, Henry DM | title = A DNA Oligonucleotide Microarray for Detecting Human Astrovirus Serotypes | journal = Journal of Virological Methods | volume = 147 | issue = 1 | pages = 86–92 |date=January 2008 | pmid = 17905448 | pmc = 2238180 | doi = 10.1016/j.jviromet.2007.07.028 | url = |display-authors=etal}} 3. ^{{cite journal|vauthors=Matsui SM, Kiang D, Ginzton N, Chew T, Geigenmüller-Gnirke U |title=Molecular biology of astroviruses: selected highlights|journal=Novartis Found. Symp.|volume=238|issue=|pages=219–33; discussion 233–6|year=2001|pmid=11444028|doi=10.1002/0470846534.ch13|series=Novartis Foundation Symposia|isbn=978-0-470-84653-7}} 4. ^{{Cite web|url=http://web.stanford.edu/~siegelr/trayner.html|title=The Epidemiology of Astroviruses|website=web.stanford.edu|access-date=2016-10-15}} 5. ^{{Cite web|url=http://www.antimicrobe.org/v37.asp|title=Astroviruses - Infectious Disease and Antimicrobial Agents|website=www.antimicrobe.org|access-date=2016-10-15}} 6. ^{{Cite web|url=http://web.stanford.edu/group/virus/astro/2004ambili/Astrohome.html|title=Astroviridae|website=web.stanford.edu|access-date=2016-11-11}} 7. ^{{cite journal |vauthors = Guix S, Bosch A, Pintó RM |title = Human astrovirus diagnosis and typing: current and future prospects |journal = Lett. Appl. Microbiol. |volume = 41 |issue = 2 |pages = 103–5 |year = 2005 |pmid = 16033504 |doi = 10.1111/j.1472-765X.2005.01759.x |url = http://www.blackwell-synergy.com/openurl?genre=article&sid=nlm:pubmed&issn=0266-8254&date=2005&volume=41&issue=2&spage=103|archive-url = https://archive.is/20130118114805/http://www.blackwell-synergy.com/openurl?genre=article&sid=nlm:pubmed&issn=0266-8254&date=2005&volume=41&issue=2&spage=103|dead-url = yes|archive-date = 2013-01-18}} 8. ^{{cite journal |vauthors=Royuela E, Negredo A, Sánchez-Fauquier A |title=Development of a one step real-time RT-PCR method for sensitive detection of human astrovirus |journal=Journal of Virological Methods |volume=133 |issue=1 |pages=14–9 |date=April 2006 |pmid=16321452 |doi=10.1016/j.jviromet.2005.10.012 |url=}} 9. ^{{cite journal|last1=Bosch|first1=Albert|title=Human Astroviruses|journal=Clinical Microbiology Reviews|date=2014|volume=27|issue=4|pages=1048–74|doi=10.1128/cmr.00013-14|pmc=4187635|pmid=25278582}} 10. ^{{cite journal|title=Infectious diseases in England and Wales: January to March 1999|journal=Commun. Dis. Rep. CDR Suppl.|volume=9|issue=4|pages=S1–20|year=1999|pmid=10434464|doi=}} 11. ^1 {{cite journal|vauthors=Glass RI, Noel J, Mitchell D |title=The changing epidemiology of astrovirus-associated gastroenteritis: a review|journal=Arch. Virol. Suppl.|volume=12|issue=|pages=287–300|year=1996|pmid=9015126|doi=10.1007/978-3-7091-6553-9_31|display-authors=etal|series=Archives of Virology|isbn=978-3-211-82875-5}} 12. ^{{cite journal|vauthors=Koopmans MP, Bijen MH, Monroe SS, Vinjé J |title=Age-Stratified Seroprevalence of Neutralizing Antibodies to Astrovirus Types 1 to 7 in Humans in The Netherlands|journal=Clin. Diagn. Lab. Immunol.|volume=5|issue=1|pages=33–7|year=1998|pmid=9455876|doi=|url=http://cvi.asm.org/cgi/pmidlookup?view=long&pmid=9455876|pmc=121387}} 13. ^{{cite journal|vauthors=Midthun K, Greenberg HB, Kurtz JB, Gary GW, Lin FY, Kapikian AZ |title=Characterization and seroepidemiology of a type 5 astrovirus associated with an outbreak of gastroenteritis in Marin County, California|journal=J. Clin. Microbiol.|volume=31|issue=4|pages=955–62|year=1993|pmid=8385155|doi=|url=http://jcm.asm.org/cgi/pmidlookup?view=long&pmid=8385155|pmc=263593}} 14. ^{{cite journal |vauthors=Monroe SS, Holmes JL, Belliot GM |title=Molecular epidemiology of human astroviruses |journal=Novartis Foundation Symposium |volume=238 |issue= |pages=237–45; discussion 245–9 |year=2001 |pmid=11444029 |doi= 10.1002/0470846534.ch14|url= |series=Novartis Foundation Symposia |isbn=978-0-470-84653-7}} 15. ^{{cite journal|last1=Bjorkholm|first1=M|title=Successful Intravenous Immunoglobulin Therapy for Severe and Persistent Astrovirus Gastroenteritis after Fludarabine Treatment in a Patient with Waldenström's Macroglobulinemia.|journal=International Journal of Hematology|date=1995|volume=62|issue=2|pages=117–20|pmid=8590772|doi=10.1016/0925-5710(95)00396-A}} 16. ^{{cite journal|last1=Tellez|first1=M|title=In Vitro Antiviral Activity against Rotavirus and Astrovirus Infection Exerted by Substances Obtained from Achyrocline bogotensis (Kunth) DC. (Compositae).|journal=BMC Complementary and Alternative Medicine|date=2015|volume=15|issue=1|page=428 |doi=10.1186/s12906-015-0949-0|pmc=4668688|pmid=26630872}} 17. ^{{cite web|last1=ICTV|title=Virus Taxonomy: 2014 Release|url=http://ictvonline.org/virusTaxonomy.asp|accessdate=12 June 2015}} 18. ^{{cite journal |vauthors = Lukashov VV, Goudsmit J |title = Evolutionary relationships among Astroviridae |journal = J. Gen. Virol. |volume = 83 |issue = Pt 6 |pages = 1397–405 |year = 2002 |pmid = 12029155 |doi = 10.1099/0022-1317-83-6-1397 |url = http://vir.sgmjournals.org/cgi/pmidlookup?view=long&pmid=12029155|archive-url = https://archive.is/20130113060653/http://vir.sgmjournals.org/cgi/pmidlookup?view=long&pmid=12029155|dead-url = yes|archive-date = 2013-01-13}} 19. ^Tse H, Chan WM, Tsoi HW, Fan RY, Lau CC, Lau SK, Woo PC, Yuen KY. (2011) Re-discovery and genomic characterization of bovine astroviruses. J Gen Virol. 20. ^{{cite journal |author=Krishna NK |title=Identification of Structural Domains Involved in Astrovirus Capsid Biology |journal=Viral Immunol. |volume=18 |issue=1 |pages=17–26 |year=2005 |pmid=15802951 |doi=10.1089/vim.2005.18.17 |pmc=1393289}} 21. ^1 {{cite web|title=Viral Zone|url=http://viralzone.expasy.org/all_by_species/27.html|publisher=ExPASy|accessdate=12 June 2015}} 22. ^{{cite journal | vauthors = Dong J et al | year = 2011 | title = Crystal structure of the human astrovirus capsid spike | url = | journal = Proceedings of the National Academy of Sciences | volume = 108 | issue = 31| pages = 12681–12686 | doi=10.1073/pnas.1104834108| pmc = 3150915 | pmid=21768348| bibcode = 2011PNAS..10812681D }} 23. ^{{cite journal |vauthors=Willcocks MM, Brown TD, Madeley CR, Carter MJ |title=The complete sequence of a human astrovirus |journal=J. Gen. Virol. |volume=75 |issue= 7|pages=1785–8 |year=1994 |pmid=8021608 |url=http://vir.sgmjournals.org/cgi/pmidlookup?view=long&pmid=8021608 |doi=10.1099/0022-1317-75-7-1785 }} 24. ^{{cite journal|author=Royuela E.|title=Molecular cloning, expression and first antigenic characterization of human astrovirus VP26 structural protein and a C-terminal deleted form.|journal=Comp Immunol Microbiol Infect Dis|volume=33|issue=277|year=2010|doi=10.1016/j.cimid.2008.07.010|pmid=18790534|pages=1–14}} 25. ^Babkin IV, Tikunov AY, Zhirakovskaia EV, Netesov SV, Tikunova NV (2012) High evolutionary rate of human astrovirus. Infect Genet Evol 26. ^{{cite journal | vauthors = Kelly AG, Netzler NE, White PA | year = 2016 | title = Ancient recombination events and the origins of hepatitis E virus | url = | journal = BMC Evol Biol | volume = 16 | issue = 1| page = 210 | doi=10.1186/s12862-016-0785-y| pmid = 27733122 }} 27. ^Virus taxonomy: classification and nomenclature of viruses: Ninth Report of the International Committee on Taxonomy of Viruses. (2012) Ed: King, A.M.Q., Adams, M.J., Carstens, E.B. and Lefkowitz, E.J. San Diego: Elsevier. 28. ^{{cite journal | last1 = Phan | first1 = TG | last2 = Kapusinszky | first2 = B | last3 = Wang | first3 = C | last4 = Rose | first4 = RK | last5 = Lipton | first5 = HL | display-authors = etal | year = 2011 | title = The Fecal Viral Flora of Wild Rodents | url = | journal = PLoS Pathog | volume = 7 | issue = 9| page = e1002218 | doi = 10.1371/journal.ppat.1002218 | pmid=21909269 | pmc=3164639}} 29. ^{{cite journal | last1 = Ng | first1 = TFF | last2 = Kondov | first2 = NO | last3 = Hayashimoto | first3 = N | last4 = Uchida | first4 = R | last5 = Cha | first5 = Y | display-authors = etal | year = 2013 | title = Identification of an Astrovirus Commonly Infecting Laboratory Mice in the US and Japan | journal = PLoS ONE | volume = 8 | issue = 6| page = e66937 | doi = 10.1371/journal.pone.0066937 | pmid=23825590 | pmc=3692532| bibcode = 2013PLoSO...866937N }} 30. ^{{cite journal|last1=Yoneda|first1=Masaki|title=Epidemiological Characteristics of Sapovirus and Human Astrovirus Detected among Children in Nara Prefecture, Japan, during the 2009/2010–2014/2015 Seasons.|journal=Japanese Journal of Infectious Diseases|date=2017|volume=70|issue=1|pages=87–91|doi=10.7883/yoken.jjid.2015.529|pmid=27000458}} 31. ^{{cite journal|last1=Cortez|first1=Valerie|title=Persistent Infections with Diverse Co-Circulating Astroviruses in Pediatric Oncology Patients, Memphis, Tennessee, USA|journal=Emerging Infectious Diseases|date=2017|volume=23|issue=2|pages=288–290|doi=10.3201/eid2302.161436|pmid=28098537|pmc=5324824}} 32. ^{{cite journal|last1=Bennett|first1=Susan|title=The Development of a Multiplex Real-time RT-PCR for the Detection of Adenovirus, Astrovirus, Rotavirus and Sapovirus from Stool Samples.|journal=Journal of Virological Methods|date=2017|volume=242|pages=30–34|doi=10.1016/j.jviromet.2016.12.016|pmid=28040514}} 33. ^{{cite journal|last1=Yuan|first1=Tao|title=A Consecutive Centrifugal Method for Concentration of Human Enteric Viruses in Water Samples.|journal=Archives of Virology|date=2017|volume=161|issue=12|pages=3323–3330|doi=10.1007/s00705-016-3031-4|pmid=27581806}} 34. ^{{cite journal|last1=Lum|first1=Su Han|title=An Emerging Opportunistic Infection: Fatal Astrovirus (VA1/HMO-C) Encephalitis in a Pediatric Stem Cell Transplant Recipient.|journal=Transplant Infectious Disease|date=2017|volume=18|issue=6|pages=960–964|doi=10.1111/tid.12607|pmid=27632248}} External links
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