Proposed taxonomic revision of Giardia duodenalis

Caroline Wielinga; Andrew Williams; Paul Monis; R C Andrew Thompson

doi:10.1016/j.meegid.2023.105430

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Proposed taxonomic revision of Giardia duodenalis

Journal article

Open access

Peer reviewed

Proposed taxonomic revision of Giardia duodenalis

Caroline Wielinga, Andrew Williams, Paul Monis and R C Andrew Thompson

Infection, genetics and evolution, Vol.111, 105430

2023

DOI: https://doi.org/10.1016/j.meegid.2023.105430

PMID: 36972861

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Abstract

Animals

Cats

Deer

Feces - parasitology

Gastropoda

Genotype

Giardia lamblia - genetics

Giardiasis - parasitology

Humans

Retrospective Studies

Giardia duodenalis, Giardia enterica, Giardia intestinalis and Giardia lamblia are the synonyms for a species complex of 8-11 phylogenetically distinct species of Giardia infecting a broad range of animals including humans. Retrospective alignment of 8409 gene sequences from 3 loci confirmed host associations of Assemblages and sub-Assemblages within this species complex and molecular species delimitation testing confirmed that the Assemblages and sub-Assemblages AI and AII should be recognised as distinct species. It is recommended to synonymise the Assemblages with historic species descriptions based on host associations and consider descriptions for new species where no corresponding description exists. Synonyms, Giardia duodenalis, Giardia intestinalis and Giardia enterica, to be removed from synonymy: synonymise "Giardia duodenalis-Assemblage AI" syn. n. to Giardia duodenalis (Davaine, 1875), Kofoid and Christansen, 1915, synonymise "Giardia duodenalis-Assemblage AII" syn. n. to Giardia intestinalis (Lambl, 1859; Blanchard, 1885), Alexeieff, 1914 and synonymise "Giardia duodenalis-Assemblage B" syn. n. to Giardia enterica (Grassi, 1881), Kofoid, 1920. Host specific Assemblages synonymised: synonymise canid-associated "Giardia duodenalis-Assemblage C" syn. n. to Giardia canisHegner, 1922; synonymise artiodactyl-associated "Giardia duodenalis-Assemblage E" syn. n. to Giardia bovisFantham, 1921; synonymise feline-associated "Giardia duodenalis-Assemblage F" syn. n. to Giardia catiDeschiens, 1925; and synonymise rodent-associated "Giardia duodenalis-Assemblage G" syn. n. to Giardia simoniLavier, 1924. New description for parasite type infecting specific host: canid-associated "Giardia duodenalis-Assemblage D" named Giardia lupus, sp. n. (LSID: urn:lsid:zoobank.org:act:1651A8CB-CBA8-40D9-AB59-D4AB11AC18A3). New proposed names and descriptions for consideration for parasite types infecting specific hosts: cervid-associated "Giardia duodenalis-sub-Assemblage AIII" for consideration "cervus" and Pinnipedia-associated "Giardia duodenalis-Assemblage H" for consideration "pinnipedis".

Details

Title: Proposed taxonomic revision of Giardia duodenalis
Authors/Creators: Caroline Wielinga - Murdoch University
Andrew Williams - School of Veterinary and Health Sciences, Murdoch University, 90 South Street, Murdoch, Western Australia 6150, Australia. Electronic address: Andrew.williams@murdoch.edu.au
Paul Monis - South Australian Water Corporation
R C Andrew Thompson - School of Veterinary and Health Sciences, Murdoch University, 90 South Street, Murdoch, Western Australia 6150, Australia. Electronic address: A.Thompson@murdoch.edu.au
Publication Details: Infection, genetics and evolution, Vol.111, 105430
Publisher: Elsevier
Identifiers: 991005585963607891
Murdoch Affiliation: College of Environmental and Life Sciences
Language: English
Resource Type: Journal article

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