研究发现养狗可防幼儿哮喘
<p><span word="Scientists">Scientists</span> <span word="studying">studying</span> <span word="why">why</span> <span word="pets">pets</span> <span word="appear">appear</span> <span word="to">to</span> <span word="protect">protect</span> <span word="kids">kids</span> <span word="against">against</span> <span word="asthma">asthma</span> <span word="and">and</span> <span word="allergies">allergies</span> <span word="say">say</span> <span word="the">the</span> <span word="answer">answer</span> <span word="might">might</span> <span word="lie">lie</span> <span word="in">in</span> <span word="the">the</span> <span word="world">world</span> <span word="of">of</span> <span word="bacteria">bacteria</span> <span word="that">that</span> <span word="live">live</span> <span word="in">in</span> <span word="the">the</span> <span word="gut">gut</span>.</p><p>科学家们研究了养宠物为何似乎能保护孩子不会患上哮喘与过敏，他们说，答案可能在于肠道内生活的菌群。</p><p><span word="A">A</span> <span word="new">new</span> <span word="study">study</span> <span word="published">published</span> <span word="Monday">Monday</span> <span word="found">found</span> <span word="that">that</span> <span word="exposing">exposing</span> <span word="mice">mice</span> <span word="to">to</span> <span word="dust">dust</span> <span word="from">from</span> <span word="households">households</span> <span word="where">where</span> <span word="dogs">dogs</span> <span word="were">were</span> <span word="allowed">allowed</span> <span word="outdoors">outdoors</span> <span word="significantly">significantly</span> <span word="changed">changed</span> <span word="the">the</span> <span word="composition">composition</span> <span word="of">of</span> <span word="gut">gut</span> <span word="microbes">microbes</span> <span word="in">in</span> <span word="the">the</span> <span word="mice">mice</span>.</p><p>周一公布的新研究发现，将老鼠暴露于准许狗外出的家庭产生的灰尘中，极大地改变了老鼠肠道菌群的成分。</p><p><span word="When">When</span> <span word="the">the</span> <span word="mice">mice</span> <span word="were">were</span> <span word="then">then</span> <span word="challenged">challenged</span> <span word="with">with</span> <span word="some">some</span> <span word="well">well</span>-<span word="known">known</span> <span word="allergy">allergy</span> <span word="triggers">triggers</span>, <span word="they">they</span> <span word="had">had</span> <span word="significantly">significantly</span> <span word="reduced">reduced</span> <span word="allergic">allergic</span> <span word="responses">responses</span> <span word="compared">compared</span> <span word="with">with</span> <span word="mice">mice</span> <span word="that">that</span> <span word="had">had</span> <span word="been">been</span> <span word="exposed">exposed</span> <span word="to">to</span> <span word="dust">dust</span> <span word="from">from</span> <span word="homes">homes</span> <span word="without">without</span> <span word="dogs">dogs</span> <span word="or">or</span> <span word="that">that</span> <span word="weren">weren</span>'<span word="t">t</span> <span word="exposed">exposed</span> <span word="to">to</span> <span word="any">any</span> <span word="dust">dust</span>.</p><p>随后这些老鼠被注射了一些有名的过敏触发物，相比那些暴露于无狗家庭灰尘或是未暴露于灰尘中的老鼠，这些老鼠的过敏反应大大减小。</p>
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