題目 題型:單選題 難度:★★★★★ 13.3萬熱度
DUNGTODEATHFIELDSACROSSEUROPEARECONTAMINATEDWITHDANGEROUSLEV
DungtoDeathFieldsacrossEuropearecontaminatedwithdangerouslevelsoftheantibioticsgiventofarmanimals.Thedrugs,whichareinmanuresprayedontofieldsasfertilizers,couldbegettingintoourfoodandwater,helpingtocreateanewgenerationofantibiotic-resistant"superbugs".ThewarningcomesfromaresearcherinSwitzerlandwholookedatlevelsofthedrugsinfarmslurryHisfindingsareparticularlyshockingbecauseSwitzerlandisoneofthefewcountriestohavebannedantibioticsasgrowthpromotersinanimaldead.Some20,000tonsofantibioticsareusedintheEuropeanUnionandtheUSeachyear.Morethanhalfaregiventofarm-animalstopreventdiseaseandpromotegrowth.______Mostresearchersassumedthathumansbecomeinfectedwiththeresistantstrainsbyeatingcontaminatedmeat.Butfarmoreofthedrugsend.upinmanurethaninmeatproducts,saysStephenMuelleroftheSwissFederalInstituteforEnvironmentalScienceandTechnologyinDubendorf.Andmanurecontainsespeciailyhighlevelsofbugsthatareresistanttoantibioticshesays.Withmillionsoftonsofanimalsmanurespreadontofieldsofcropssuchaswheatandbarleyeachyear,thispathwayseemsanequallylikelyrouteforspreadingresistance,hesaid.Thedrugscontaminatethecrops,whicharetheneaten.Theycouldalsobeleachingintotapwaterpumpedfromrocksbeneathfertilizedfields.Muellerisparticularlyconcernedaboutagroupofantibioticscalledsulphonamides.Theydonoteasilydegradeordissolveinwater.HisanalysisfoundthatSwissfarmmanurecontainsahighpercentageofsulphonamides;eachhectareoffieldcouldbecontaminatedwithupto1kilogramofthedrugs.Thisconcentrationishighenoughtotriggerthedevelopmentofresistanceamongbacteria.Butvetsarenottreatingtheissueseriously.Thereisgrowingconcernattheextenttowhichdrugs,includingantibiotics,arepollutingtheenvironment.Manydrugsgiventohumansarealsoexcretedunchangedandarenotbrokendownbyconventionalsewagetreatment.
A.Theydonoteasilydegradeordissolveinwater.
B.Andmanurecontainsespeciailyhighlevelsofbugsthatareresistanttoantibioticshesays.
C.Animalantibioticsisstillanareatowhichinsufficientattentionhasbeenpaid
D.Butrecentresearchhasfoundadirectlinkbetweentheincreaseduseofthesefarmyarddrugsandtheappearanceofantibiotic-resistantbugsthatinfectpeople.
E.HisfindingsareparticularlyshockingbecauseSwitzerlandisoneofthefewcountriestohavebannedantibioticsasgrowthpromotersinanimaldead.
F.Theycouldalsobeleachingintotapwaterpumpedfromrocksbeneathfertilizedfields.
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