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Strongyloides stercoralis

BioProject PRJEB528 | Data Source Wellcome Sanger Institute | Taxonomy ID 6248

About Strongyloides stercoralis

The nematode Strongyloides stercoralis, or human threadworm, is a wide-spread, minute gastro-intestinal parasite of humans, occurring principally in the tropics and sub-tropics. Infection of immunosuppressed individuals can result in disseminated strongyloidiasis, in which worms occur throughout the body and can be fatal.

Genome Assembly & Annotation


The draft genome assembly was produced by the Parasite Genomic group at the Wellcome Trust Sanger Institute, in collaboration with James B. Lok (University of Pennsylvania School of Veterinary Medicine), using Illumina paired-end sequencing followed by an in-house genome assembly pipeline comprising various steps, including contig assembly, scaffolding, gap-filling and error-correction, followed by some bespoke manual improvement (WTSI Strongyloididae Nematode Genomes Project, Hunt et al. (2016)).


The gene predictions were made by the Parasite Genomics group at the Wellcome Trust Sanger Institute as part of the Strongyloididae Nematode Genomes Project, Hunt et al. (2016). An in-house automatic pipeline (based around AUGUSTUS plus MAKER) was used to generate first-pass gene models, and this was followed by a round of targeted manual curation of selected gene families by the initial submitters and external collaborators including the Department of Biology at the Millersville University and the Hallem Lab at the Department of Microbiology, Immunology, and Molecular Genetics of the University of California, Los Angeles.

Key Publications

  • Hunt VL, Tsai IJ, Coghlan A, Reid AJ, Holroyd N, Foth BJ, Tracey A, Cotton JA, Stanley EJ, Beasley H, Bennett HM, Brooks K, Harsha B, Kajitani R, Kulkarni A, Harbecke D, Nagayasu E, Nichol S, Ogura Y, Quail MA, Randle N, Xia D, Brattig NW, Soblik H, Ribeiro DM, Sanchez-Flores A, Hayashi T, Itoh T, Denver DR, Grant W, Stoltzfus JD, Lok JB, Murayama H, Wastling J, Streit A, Kikuchi T, Viney M, Berriman M. The genomic basis of parasitism in the Strongyloides clade of nematodes. Nat Genet, 2016;48(3):299-307

Assembly Statistics

AssemblyS_stercoralis_PV0001_v2_0_4, GCA_000947215.1
Database VersionWBPS18
Genome Size42,674,647
Data SourceWellcome Sanger Institute
Annotation Version2022-01-WormBase

Gene counts

Coding genes13,123
Gene transcripts13,149

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