RefSeq viral genomes database for mashID - RefSeq release 237 (2026-09-28)

<p dir="ltr">Mash sketch database of all viral genomes in NCBI RefSeq release 237 for virus identification and prophage or viral contamination detection with mashID (github.com/duceppemo/mashID).</p><p dir="ltr">Contents</p><p dir="ltr">- refseq_viral_r237_2026-09-28.msh: Mash 2.3 sketches, k-mer size 21, sketch size 2000, 19,625 RefSeq viral records (complete genomes and genome segments; 6,427 phages), 304 MB.

MD5: 7394b54d24840d343ac77e527a53482d</p><p dir="ltr">- refseq_viral_r237_2026-09-28.metadata.tsv: one line per reference with RefSeq accession, organism name (current ICTV species name as recorded by RefSeq), NCBI TaxID, sequence length, sketch hash count, source file and record definition. mashID reads it automatically when it sits next to the .msh file.</p><p dir="ltr">Construction</p><p dir="ltr">The viral division of RefSeq release 237 (viral.1.1.genomic.fna.gz and viral.1.genomic.gbff.gz from ftp.ncbi.nlm.nih.gov/refseq/release/viral) was split into one file per record; organism names and TaxIDs were taken from the GenBank flat file.