Link to NCBI Front Page Taxonomy Logo
Entrez PubMed Nucleotide Protein Genome Structure PMC Taxonomy BioCollections
Taxonomy browser (Giardia intestinalis)

Giardia intestinalis

Taxonomy ID: 5741 (for references in articles please use NCBI:txid5741)
current name
Giardia intestinalis (Lambl, 1859) Kofoid & Christiansen, 1915
homotypic synonym:
Lamblia intestinalis
NCBI BLAST name: diplomonads
Rank: species
Genetic code: Translation table 1 (Standard)
Plastid genetic code: Translation table 11 (Bacterial, Archaeal and Plant Plastid)
Other names:
heterotypic synonym
Giardia duodenalis
heterotypic synonym
Giardia lamblia
Lineage( full )
cellular organisms; Eukaryota; Metamonada; Fornicata; Diplomonadida; Hexamitidae; Giardiinae; Giardia
   Entrez records   
Database name Subtree links Direct links
Nucleotide 50,800 48,429
Protein 53,330 37,492
Structure 70 34
Genome 1 1
Popset 799 792
Conserved Domains 8 4
GEO Datasets 191 162
PubMed Central 8,963 8,963
Gene 14,286 5,389
SRA Experiments 901 858
Protein Clusters 743 -
Identical Protein Groups 34,147 22,237
BioProject 64 55
BioSample 828 808
Assembly 38 33
Genetic Testing Registry 2 2
PubChem BioAssay 197 193
Taxonomy 15 1

Comments and References:

image:Giardia intestinalis
Giardia intestinalis was described 1859 by Wilhelm Lambl as Cercomonas intestinalis. Since then, the organism has undergone multiple name changes and several names are in curent use including Giardia lamblia, Giardia duodenalis and Giardia intestinalis. Some prefer Giardia intestinalis (Kulda and Nohynkova 1995. Giardia in humans and other animals, pp. 225-422 - in particular pp. 270-271 - in: Kreier, J.P.: Parasitic Protozoa volume 10, Academic Press). Other authors have argued that if there is a single species of Giardia in humans and other mammals, than duodenalis should have priority over intestinalis (Monis, Caccio et Thompson 2009). And Adam states after a review of the nomenclatural history that there does not appear adequate reason to abandon the term G. lamblia, which has been widely accepted in the medical and scientific literature (Adam RD 2001. Biology of Giardia lamblia).
Adam RD (2001). Biology of Giardia lamblia.
Monis, Caccio & Thompson (2009). Variation in Giardia: towards a taxonomic revision of the genus.

Genome Information

Go to NCBI genomic BLAST page for Giardia intestinalis
Genome view: 5 chromosomes
Names 1 2 3 4 5

External Information Resources (NCBI LinkOut)

LinkOut Subject LinkOut Provider
Giardia lamblia taxonomy taxonomy/phylogenetic Arctos Specimen Database
2 records from this provider organism-specific BioCyc
dryaddb supplemental materials Dryad Digital Repository
Giardia lamblia Kofoid and Christiansen, 1915 taxonomy/phylogenetic Encyclopedia of life
3 records from this provider organism-specific Genomes On Line Database
Related Immune Epitope Information gene/protein/disease-specific Immune Epitope Database and Analysis Resource
Giardia lamblia Kofoid and Christiansen, 1915 taxonomy/phylogenetic Integrated Taxonomic Information System
OMA taxonomy/phylogenetic OMA Browser: Orthologous MAtrix
2 records from this provider taxonomy/phylogenetic TreeBase
3 records from this provider organism-specific WebScipio - eukaryotic gene identification
3 records from this provider taxonomy/phylogenetic World Register of Marine Species
4 records from this provider organism-specific diArk - a resource for eukaryotic genome research
Wikipedia taxonomy/phylogenetic iPhylo
CDC-DPDx taxdemo
Groups interested in participating in the LinkOut program should visit the LinkOut home page.
A list of our current non-bibliographic LinkOut providers can be found here.

Information from sequence entries

Show organism modifiers

Disclaimer: The NCBI taxonomy database is not an authoritative source for nomenclature or classification - please consult the relevant scientific literature for the most reliable information.

Reference: How to cite this resource - Schoch CL, et al. NCBI Taxonomy: a comprehensive update on curation, resources and tools. Database (Oxford). 2020: baaa062. PubMed: 32761142 PMC: PMC7408187.

Comments and questions to

[Help] [Search] [NLM NIH] [Disclaimer]