Morphology is not a reliable tool for delineating species within cryptosporidium

A. Fall; R.C.A. Thompson; R.P. Hobbs; U.M. Morgan-Ryan

doi:10.1645/0022-3395(2003)089[0399:MINART]2.0.CO;2

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Morphology is not a reliable tool for delineating species within cryptosporidium

Journal article

Open access

Peer reviewed

Morphology is not a reliable tool for delineating species within cryptosporidium

A. Fall, R.C.A. Thompson, R.P. Hobbs and U.M. Morgan-Ryan

Journal of Parasitology, Vol.89(2), pp.399-402

04/2003

DOI: https://doi.org/10.1645/0022-3395(2003)089[0399:MINART]2.0.CO;2

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Abstract

Within the coccidia, morphological features of the oocyst stage at the light microscope level have been used more than any other single characteristic to designate genus and species. The aim of this study was to conduct morphometric analysis on a range of Cryptosporidium spp. isolates and to compare morphological data between several genotypes of C. parvum and a second species C. canis, as well as a variation within a specific genotype (the human genotype), with genetic data at 2 unlinked loci (18S ribonucleic deoxyribonucleic acid and HSP 70) to evaluate the usefulness of morphometric data in delineating species within Cryptosporidium. Results indicate that morphology could not differentiate between oocysts from C. parvum genotypes and oocysts from C. canis, whereas genetic analysis clearly differentiated between the two. The small size of the Cryptosporidium spp. oocyst, combined with the very limited characters for analysis, suggests that more reliance should be placed on genetic differences, combined with biological variation, when delineating species within Cryptosporidium.

Details

Title: Morphology is not a reliable tool for delineating species within cryptosporidium
Authors/Creators: A. Fall (Author/Creator) - Murdoch University
R.C.A. Thompson (Author/Creator) - Murdoch University
R.P. Hobbs (Author/Creator) - Murdoch University
U.M. Morgan-Ryan (Author/Creator) - To whom correspondence should be addressed. unaryan@central.murdoch.edu.au
Publication Details: Journal of Parasitology, Vol.89(2), pp.399-402
Publisher: American Society of Parasitologists
Identifiers: 991005544236407891
Copyright: © 2003 American Society of Parasitologists
Murdoch Affiliation: School of Veterinary and Biomedical Sciences
Language: English
Resource Type: Journal article

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Citation topics: 1 Clinical & Life Sciences; 1.246 Diarrheal Diseases; 1.246.985 Cryptosporidium
Web Of Science research areas: Parasitology
ESI research areas: Microbiology