這是一坨專屬于你的臭臭云

A Unique Poo Cloud Follows You Around Everywhere You Go

The Cloud seems to be everywhere these days： On your com puter， phones， and now， your very own body. Well， sort of—because according to research out of the University of Oregon， every human possesses their own microbial cloud.

The participants sat alone inside a sanitized① chamber， each emitting②a unique combination of bacteria③. Most of t he subject s could be identified by their cloud within four hours， specifically by several groups of bacteria： Streptococcus （usually found in the mouth）， Propionibacterium（found on skin）， and Corynebacterium（also skin）. All participants had these bacteria， but the various combinations served to distinguish each person.

\"We expected that we would be able to detect the human microbiome in the air around a person， but we were surprised to find that we could identify most of the occupants just by sampling their microbial cloud，\" said lead author J ames F. Meadow， a postdoctoral researcher formerly from the Biology and the Built Environment Center at the University of Oregon.

\"Our study suggests that bacterial emissions from a relatively inactive person， sitting at a desk for instance， hav e a strong influence on the bacteria circulat ing in an enclosed space and on surrounding surfaces.\"

This information sheds a new light on how an individual’s microbiome（（bacteria）） can spread to the surrounding environment. This means we may have a new mechanism for understanding the spread of infectious diseases， and may even have forensic applications by allowing scientists to trace where someone has been.

這團云似乎無處不在：它縈繞在你的電腦上、手機上，或者你的身體里。美國俄勒岡大學研究發現，每個人都有專屬于他們自己的微細菌云。

每個被試者被單獨放在一個消毒的小房間里，之后他們的身體就會開始向空氣中發射一種獨特的細菌。大部分被試者能在四小時內通過細菌云確定他們的身份，特別是通過幾組細菌：通常在口腔里的鏈球菌、皮膚上的丙酸菌和棒狀桿菌，要確認他們的身份真是so easy了。所有的被試者都有這些細菌，然而細菌們的不同組團方式使得每個人的身份得以區分。

“我們希望能檢測到一個人周圍空氣中的微生物組來識別這個人，但是我們驚訝地發現我們只能通過微生物云樣本識別大部分被試者。”文章作者原俄勒岡大學的生物學與建筑環境中心博士后研究員詹姆斯F.梅多說。

“我們的研究結果顯示，當人處于不活躍狀態時，細菌跑得可歡了。打個比方，一個坐在課桌旁的人，對他所處的封閉空間或周圍物體表面的細菌的循環有很大的影響。”

這些信息為我們揭示了個人身上的細菌群是如何向四周環境擴散的。這就意味著我們對傳染性疾病的傳播有了新的理解機制。這項新發現也可以在司法層面上運用，

研究人員只需要采集環境中的氣體，就可以對特定的人員進行追蹤啦。