Abstract：
:Whole metagenome shotgun sequencing provides information about the gene content and the composition of microbial communities provided that the processing of the samples does not introduce a methodology-driven bias. We tested the impact of DNA isolation and storage period on the metagenome profile. Deep throat swabs were collected from healthy adults and an infected infant. DNA was isolated by sonification or enzymatic lysis either immediately or after 24h storage in agar gel Amies transport medium at room temperature. Disruption of cells and subsequent fragmentation of DNA by sonification was as suitable as the common enzymatic lysis to generate high-quality metagenomes particularly for low total DNA input of less than ten nanograms. Conversely, storage of samples for 24h produced severely distorted metagenomes. The majority of species became less abundant or even extinct, whereas a few Streptococcus, Neisseria and Haemophilus spp. proliferated so that the total number of bacterial reads increased at the expense of human reads. We recommend that samples for metagenome analysis should be immediately processed or frozen at -80°C.
journal_name
J Biotechnoljournal_title
Journal of biotechnologyauthors
Wiehlmann L,Pienkowska K,Hedtfeld S,Dorda M,Tümmler Bdoi
10.1016/j.jbiotec.2017.01.001subject
Has Abstractpub_date
2017-05-20 00:00:00pages
51-55eissn
0168-1656issn
1873-4863pii
S0168-1656(17)30012-3journal_volume
250pub_type
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