SRX23105120 TaxID: 9606 SRP481865 PRJNA1061116 Each non-host sequence was aligned with the DNA sequences in the database using the principle of optimal similarity, and species information features from the database DNA sequences were utilized to summarize and merge the number of non-host sequences matched to different species. The pathogenic microbial reference genomes used for classification were downloaded from the National Center for Biotechnology Information (NCBI) (ftp://ftp.ncbi.nlm.nih.gov/genomes/) and other public databases. SRS20060948 SAMN39255551 TaxID: 9606 WGS GENOMIC size fractionation NextSeq 550