Reagent and laboratory contamination can critically impact sequence-based microbiome analyses.
Reagent and laboratory contamination can critically impact sequence-based microbiome analyses.
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DOI:
10.1186/s12915-014-0087-z
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发表时间:
2014-11-12
期刊:
影响因子:
5.4
通讯作者:
Walker AW
中科院分区:
文献类型:
--
作者:
Salter SJ;Cox MJ;Turek EM;Calus ST;Cookson WO;Moffatt MF;Turner P;Parkhill J;Loman NJ;Walker AW
The study of microbial communities has been revolutionised in recent years by the widespread adoption of culture independent analytical techniques such as 16S rRNA gene sequencing and metagenomics. One potential confounder of these sequence-based approaches is the presence of contamination in DNA extraction kits and other laboratory reagents. In this study we demonstrate that contaminating DNA is ubiquitous in commonly used DNA extraction kits and other laboratory reagents, varies greatly in composition between different kits and kit batches, and that this contamination critically impacts results obtained from samples containing a low microbial biomass. Contamination impacts both PCR-based 16S rRNA gene surveys and shotgun metagenomics. We provide an extensive list of potential contaminating genera, and guidelines on how to mitigate the effects of contamination. These results suggest that caution should be advised when applying sequence-based techniques to the study of microbiota present in low biomass environments. Concurrent sequencing of negative control samples is strongly advised. The online version of this article (doi:10.1186/s12915-014-0087-z) contains supplementary material, which is available to authorized users.
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