BLAST-based validation of metagenomic sequence assignments.

ABSTRACT: When performing bioforensic casework, it is important to be able to reliably detect the presence of a particular organism in a metagenomic sample, even if the organism is only present in a trace amount. For this task, it is common to use a sequence classification program that determines the taxonomic affiliation of individual sequence reads by comparing them to reference database sequences. As metagenomic data sets often consist of millions or billions of reads that need to be compared to reference databases containing millions of sequences, such sequence classification programs typically use search heuristics and databases with reduced sequence diversity to speed up the analysis, which can lead to incorrect assignments. Thus, in a bioforensic setting where correct assignments are paramoun

SUBMITTER: Bazinet AL 

PROVIDER: S-EPMC5978398 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature