Bacterial community analysis of activated sludge: an evaluation of four commonly used DNA extraction methods

L. Vanysacker, S.A.J. Declerck, B. Hellemans, L. De Meester, I. Vankelecom, P. Declerck

Research output: Contribution to journal/periodicalArticleScientificpeer-review

34 Citations (Scopus)
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Abstract

The effectiveness of three commercially available direct DNA isolation kits (Mobio, Fast, Qiagen) and one published direct DNA extraction protocol (Bead) for extracting bacterial DNA from different types of activated sludge was investigated and mutually compared. The DNA quantity and purity were determined using real-time PCR targeting the bacterial 16S rDNA gene. Microbial community fingerprints were assessed by automated ribosomal intergenic spacer analysis. The resulting community profiles were analyzed with canonical correspondence analysis. Our results clearly demonstrate that direct DNA extraction methods can significantly influence the DNA quantity, purity, and observed community patterns of microbiota in activated sludge. Fast and Mobio generated high amounts of good quality DNA compared to Bead and Qiagen. Mobio also resulted in the detection of the highest number of species while Fast scored the best in discriminating between the community patterns of different activated sludge types. With respect to the characterization of community profiles, our analyses demonstrated a strong sludge type dependent variability among methods. Taking into account our results, we recommend Fast as the most suitable DNA extraction method for activated sludge samples used for bacterial community studies.
Original languageEnglish
Pages (from-to)299-307
JournalApplied Microbiology and Biotechnology
Volume88
Issue number1
DOIs
Publication statusPublished - 2010

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