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High-throughput sequencing methods for microbiome analysis, including amplicon and whole genome sequencing, show comparable precision. Careful consideration is needed when comparing small differences between distinct microbial profiling methods.

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Area of Science:

  • Microbiology
  • Genomics
  • Bioinformatics

Background:

  • High-throughput sequencing enables detailed microbiome investigation.
  • Common methods include amplicon and whole genome sequencing (WGS).
  • A direct comparison of precision and bias between these methods was lacking.

Purpose of the Study:

  • To compare the precision and bias of amplicon sequencing versus whole genome sequencing (WGS) for microbial profiling.
  • To evaluate sequencing methods using a developed metagenomic control material (MCM).

Main Methods:

  • Utilized a metagenomic control material (MCM).
  • Performed amplicon sequencing with four primer strategies targeting 16S rRNA gene regions (Roche 454 Junior).
  • Conducted whole genome sequencing (WGS) (Illumina HiSeq) and compared results with digital PCR (dPCR).

Main Results:

  • Both amplicon and WGS methods demonstrated good agreement with digital PCR (dPCR).
  • Whole genome sequencing (WGS) exhibited notably high precision.
  • Discrepancies in relative abundances between methods were generally less than twofold.

Conclusions:

  • Amplicon and WGS sequencing approaches for microbial profiling exhibit good reproducibility.
  • Caution is advised when comparing minor variations between different sequencing methods.
  • Control materials are valuable for benchmarking microbial profiling techniques and establishing thresholds.