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                          PK拾全天连中计划

                          来源:日报社  作者:   发表时间:2019-07-10 14:50:50

                          China to help ID unknown lethal viruses#标题分割#GlobaleffortaimstofinddiseasevectorsthatcanjumpfromanimalstohumansChinawillhelpleadaprojecttoidentifyunknownvirusesfromwildlifetobetterpreparehumansformajorepidemics-ifnotglobalpandemics.Theprojectistobelaunchedthisyear,accordingtooneofthecountry'stophealthofficials.TheGlobalViromeProjectwillstartinChinaandThailandwithfieldworktocollectsamplesfromwildanimalsandanalyzethevirusesdetected,saidGaoFu,headoftheChineseCenterforDiseaseControlandPrevention."Scientistswillcollectvirussamplesfromanimalssuchasbatsandratsforstudyusingtechniqueslikenextgeneration(DNA)sequencingtofindwhethernewvirusesexist,"hesaid.Theproject,estimatedtocostupto$1.2billion,isexpectedtotake10yearsandinvolvesmanycountriesincludingtheUnitedStates,BrazilandNigeria.Throughmoreintensiveandextensivestudyofvirusesfromanimalsthatcouldinfecthumans,itmaybepossibletodealwithvirusesusingpreemptivecontrolsandpreventioninsteadofpassive,reactivemeasures,Gaosaid."Weallknowtherearealmostcertainlynewvirusesthatcouldcausethenextglobalpandemic,butbasedontheexistingearlywarningcapacityfordiseases,wedonotknow,forexample,whichviruswillcauseanepidemic,"Gaosaid."Wearesurethatnewvirusstrainswillappearinthefuturealongwithchangesinourecology,environmentandhumanbehaviors."Forinstance,humans'abuseofantibioticshasleadtothepotentialdevelopmentofsuperbugs."Therearemanyviruseslivinginwildanimals,sowecanidentifyvirusesandthoroughlystudythosethatcouldpasstohumans,"Gaosaid."Ideallywecandevelopvaccinesandadiagnosisforsuchvirusesevenbeforetheycausehumanepidemics."Itisknownthat263virusescaninfecthumans,butscientistsestimatetheremaybemorethanhalfamillionvirusesthatliveinbirdsandmammalsandthatareunknowntohumansthatmaybecapableofinfectinghumans,andtheyaretheprimarysubjectoftheproject'sresearch,Gaosaid.Evenifalargenumberofsuchunknownvirusesareidentified,itispossiblethatjustasmallfractionofthemhavetheabilitytocausemajorepidemicsthatcausehumandeaths,hesaid.However,consideringthehugecostofamajorepidemiclikeSARStohumanhealthandeconomies,thefindingsoftheprojectstillhavethepotentialtogreatlyreducelossesthroughimprovedearlydiagnosisandidentificationofhostsvulnerabletoanewvirusafteranoutbreak,accordingtoGao.AsimilarprojectcarriedoutbytheUSAgencyforInternationalDevelopmentprovedthefeasibilityoftheGlobalViromeProjectandprovideshelpfulexperience,hesaid.TheUSAIDproject,knownasPredictandlaunchedin2009,withChinaaparticipant,ledtofindingsofmorethan1,000virusespreviouslyunknowntohumans.Theprojectcostwasover$170million,hesaid.SomeofthetechnologiesusedforthatprojecthaveprovedreliableandeconomicallyaffordableandcanbeusedfortheGlobalViromeProject,Gaosaid.  

                          编辑:naowei

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