10.5524/102637

The rapid progression of metagenomic sequencing technology presents tremendous opportunities for delving into the complex roles of microbiomes in both host health and disease. It also allows scientists to uncover the unknown structures and functions inherent in microbial communities. However, this fast-paced accumulation of metagenomic data also brings forth significant challenges, particularly in terms of data analysis. One critical issue is contamination from host DNA, which can significantly undermine the accuracy of results and escalate computational resource requirements by including sequences that are not the primary target.

In our study, we explored the impact of computational decontamination of host DNA on subsequent analyses, emphasizing its crucial role in generating accurate results efficiently. We scrutinized the performances of several conventional tools such as KneadData, Bowtie2, BWA, KMCP, Kraken2, and KrakenUniq. Each of these tools provides unique advantages suited to different applications within the realm of metagenomic analysis.

Our evaluation revealed that an accurate host reference genome is pivotal. Its absence consistently led to diminished efficacy in decontamination across all tools. This emphasizes that the quality and precision of the reference genome directly affect the performance and outcome of the decontamination process.

Our findings underline the imperative need for careful selection when it comes to choosing decontamination tools and reference genomes. This careful selection is essential for enhancing the accuracy of metagenomic analyses. The insights from our study offer valuable guidance aimed at improving the reliability and reproducibility of microbiome research. By doing so, researchers can ensure that their analyses are not only efficient but also render credible results that significantly contribute to the understanding of microbial communities.

As we continue to witness advancements in sequencing technology, it is crucial that methodologies for data analysis keep pace. This will not only maximize the potential of metagenomics but also ensure that the findings are both robust and applicable. The repercussions of host DNA contamination, as highlighted in our study, underscore the importance of investing in optimized computational approaches, and the refinement of reference libraries tailored to specific research requirements.

In conclusion, the quest for precision in metagenomic data analysis demands innovation and vigilance. By focusing on the careful selection of tools and maintaining high standards of computational decontamination, researchers can effectively harness the power of metagenomics to unravel new insights into the enigmatic world of microbiomes.

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