Allowing sunlight in through windows can kill bacteria that live in dust, according to a study published in the open access journal Microbiome. 最近发表在开放获取期刊《微生物组》（Microbiome）上的一项研究显示，让阳光透过窗子照进房间可以杀死生活在灰尘中的细菌。
Researchers at the University of Oregon found that in dark rooms 12% of bacteria on average were alive and able to reproduce (viable). In comparison only 6.8% of bacteria exposed to daylight and 6.1% of bacteria exposed to UV light were viable. 美国俄勒冈大学的研究者们发现，在黑暗的房间中平均有12%的细菌存活且能够繁殖。与之形成对比的是，有阳光照射的房间里只有6.8%的细菌存活，UV照射过的细菌中只有6.1%仍具备繁殖能力。
Dr Fahimipour said: “Humans spend most of their time indoors, where exposure to dust particles that carry a variety of bacteria, including pathogens that can make us sick, is unavoidable. Therefore, it is important to understand how features of the buildings we occupy influence dust ecosystems and how this could affect our health.” 研究的通讯作者Dr Fahimipour说：“人类大部分时间都在室内，这使得我们不可避免地暴露在携带各种细菌、甚至是致病菌的灰尘当中。因此了解我们居住建筑的特点会如何影响灰尘的生态环境以及这对我们的健康有何影响十分重要。”
Dust kept in the dark contained organisms closely related to species associated with respiratory diseases, which were largely absent in dust exposed to daylight. 黑暗中的灰尘会携带与呼吸系统疾病密切相关的微生物种类，而这些微生物在暴露于日光下的灰尘中含量很少。
The authors found that a smaller proportion of human skin-derived bacteria and a larger proportion of outdoor air-derived bacteria lived in dust exposed to light that in than in dust not exposed to light. This may suggest that daylight causes the microbiome of indoor dust to more strongly resemble bacterial communities found outdoors. 作者们发现与黑暗中的灰尘相比，光下的灰尘中人类皮肤来源的细菌比例较小，室外空气来源的细菌比例较高。这可能表明日光会让室内灰尘的微生物组成更类似于户外发现的细菌群落。
The researchers made eleven identical climate-controlled miniature rooms that mimicked real buildings and seeded them with dust collected in residential homes. The authors applied one of three glazing treatments to the windows of the rooms, so that they transmitted visible, ultraviolet or no light. After 90 days, the authors collected dust from each environment and analysed the composition, abundance, and viability of the bacteria present. 研究人员制作了11个一模一样的气候控制微型房间，来模拟实际生活中的建筑，然后把住宅中收集的灰尘放入这些微型房间。作者对房间的窗户进行了3种处理，使它们分别可以透入可见光、紫外线或无法透光。90天之后，作者从每个环境中都收集了灰尘，并对其细菌组成、含量和繁殖能力（活力）进行了分析。
Dr Fahimipour said: “Our study supports a century-old folk wisdom, that daylight has the potential to kill microbes on dust particles, but we need more research to understand the underlying causes of shifts in the dust microbiome following light exposure. We hope that with further understanding, we could design access to daylight in buildings such as schools, offices, hospitals and homes in ways that reduce the risk of dust-borne infections.” Dr Fahimipour说：“我们的研究支持了一个有百年历史的民间智慧，阳光有杀死灰尘颗粒上的微生物的潜力，但我们还需要更多的研究来理解阳光使灰尘上微生物组成发生变化的背后机理。我们希望随着进一步的了解，我们能为像学校、办公室、医院和住宅这样的建筑设计采光方案，以降低灰尘传播细菌导致感染的风险。”
The authors caution that the miniature room environments used in the study were exposed to only a relatively narrow range of light dosages. Although the researchers selected light dosages similar to those found in most buildings, there are many architectural and geographical features that produce lower or higher dosages of light that may need additional study. 作者提醒说，研究中使用的微型室内环境仅暴露于相对较窄范围的光线剂量下。虽然研究人选所选择的光剂量与大部分建筑中的光剂量相似，但是仍有许多建筑和地理特征会产生更低或更高的光剂量，可能还需要进一步的研究。
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Notes to editor附注:
1. 原文 ：
Daylight exposure modulates bacterial communities associated with household dust
Fahimipour et al. Microbiome 2018
DOI: 10.1186/s40168-018-0559-4
When the embargo lifts the article will be available at限制令解除后，原文链接如下：:
https://microbiomejournal.biomedcentral.com/articles/10.1186/s40168-018-0559-4
Please name the journal in any story you write. If you are writing for the web, please link to the article. All articles are available free of charge, according to BMC's open access policy. 报道时请提及期刊名称。如果您是为网站写作稿件，请附上原文链接。由于BMC的开放获取政策，本刊所有文章都可以免费阅读。
2. The central purpose of Microbiome is to unite investigators conducting microbiome research in environmental, agricultural, and biomedical arenas. Topics broadly addressing the study of microbial communities, such as, microbial surveys, bioinformatics, meta-omics approaches and community/host interaction modelling will be considered for publication. Through this collection of literature Microbiome hopes to integrate researchers with common scientific objectives across a broad cross-section of sub-disciplines within microbial ecology. 《微生物组》（Microbiome）的宗旨是将环境学界、农学界和生物医学界的微生物组研究者集合起来。期刊发表的主题广泛涵盖微生物领域的研究，如微生物调查、生物信息学、宏组学研究方法和菌群/寄主相互作用模型。《微生物组》希望通过这些研究，可以将研究微生物生态学不同分支学科但具有共同的科学目标的研究者们集合到一起。
3. A pioneer of open access publishing, BMC has an evolving portfolio of high quality peer-reviewed journals including broad interest titles such as BMC Biology and BMC Medicine, specialist journals such as Malaria Journal and Microbiome, and the BMC series. At BMC, research is always in progress. We are committed to continual innovation to better support the needs of our communities, ensuring the integrity of the research we publish, and championing the benefits of open research. BMC is part of Springer Nature, giving us greater opportunities to help authors connect and advance discoveries across the world.
BMC作为开放获取出版的先锋，不断推出一系列高质量的同行评议期刊，这包括了BMC Biology 和BMC Medicine等涵盖范围较广的期刊，以及Malaria Journal、Microbiome和BMC系列期刊等专门刊物。BMC认为，科研永不止步。因此，我们致力于不断创新，以更好地满足科学共同体的需要，确保所发表的科研成果的完整性，并推广开放研究的益处。BMC是施普林格∙自然旗下机构，这让我们更有机会帮助世界各地的作者相互沟通并促进科学发现。
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Journal
Microbiome