Department of Ecology and Evolutionary Biology, Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, USA.
Proc Natl Acad Sci U S A. 2010 Apr 6;107(14):6477-81. doi: 10.1073/pnas.1000162107. Epub 2010 Mar 15.
Recent work has demonstrated that the diversity of skin-associated bacterial communities is far higher than previously recognized, with a high degree of interindividual variability in the composition of bacterial communities. Given that skin bacterial communities are personalized, we hypothesized that we could use the residual skin bacteria left on objects for forensic identification, matching the bacteria on the object to the skin-associated bacteria of the individual who touched the object. Here we describe a series of studies de-monstrating the validity of this approach. We show that skin-associated bacteria can be readily recovered from surfaces (including single computer keys and computer mice) and that the structure of these communities can be used to differentiate objects handled by different individuals, even if those objects have been left untouched for up to 2 weeks at room temperature. Furthermore, we demonstrate that we can use a high-throughput pyrosequencing-based ap-proach to quantitatively compare the bacterial communities on objects and skin to match the object to the individual with a high degree of certainty. Although additional work is needed to further establish the utility of this approach, this series of studies introduces a forensics approach that could eventually be used to independently evaluate results obtained using more traditional forensic practices.
最近的研究表明,皮肤相关细菌群落的多样性远远高于之前的认识,细菌群落的组成在个体之间存在高度的可变性。鉴于皮肤细菌群落是个性化的,我们假设我们可以使用留在物体上的残留皮肤细菌进行法医鉴定,将物体上的细菌与接触过该物体的个体的皮肤相关细菌进行匹配。在这里,我们描述了一系列证明这种方法有效性的研究。我们表明,皮肤相关细菌可以很容易地从表面(包括单个计算机键和计算机鼠标)中回收,并且这些群落的结构可以用于区分不同个体处理的物体,即使这些物体在室温下放置长达 2 周而未被触摸。此外,我们证明,我们可以使用高通量焦磷酸测序方法定量比较物体和皮肤上的细菌群落,以高度确定的方式将物体与个体进行匹配。尽管需要进一步的工作来进一步确定这种方法的实用性,但这一系列研究介绍了一种法医方法,最终可能被用于独立评估使用更传统法医实践获得的结果。
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