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Molecular Phylogenies of Blastocystis Isolates from Different Hosts: Implications for Genetic Diversity, Identification of Species, and Zoonosis

Open access
Noël, Christophe, Dufernez, Fabienne, Gerbod, Delphine, Edgcomb, Virginia P., Delgado-Viscogliosi, Pilar, Ho, Lip-Chuen, Singh, Mulkit, Wintjens, René, Sogin, Mitchell L., Capron, Monique, Pierce, Raymond, Zenner, Lionel, Viscogliosi, Eric·2005·Journal of Clinical Microbiology

Abstract

Small-subunit (SSU) rRNA gene sequences were obtained by PCR from 12 Blastocystis isolates from humans, rats, and reptiles for which elongation factor 1α (EF-1α) gene sequences are already available. These new sequences were analyzed by the Bayesian method in a broad phylogeny including, for the first time, all Blastocystis sequences available in the databases. Phylogenetic trees identified seven well-resolved groups plus several discrete lineages that could represent newly defined clades. Comparative analysis of SSU rRNA- and EF-1α-based trees obtained by maximum-likelihood methods from a restricted sampling (13 isolates) revealed overall agreement between the two phylogenies. In spite of their morphological similarity, sequence divergence among Blastocystis isolates reflected considerable genetic diversity that could be correlated with the existence of potentially ≥12 different species within the genus. Based on this analysis and previous PCR-based genotype classification data, six of these major groups might consist of Blastocystis isolates from both humans and other animal hosts, confirming the low host specificity of Blastocystis . Our results also strongly suggest the existence of numerous zoonotic isolates with frequent animal-to-human and human-to-animal transmissions and of a large potential reservoir in animals for infections in humans.

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Crossref · 10.1128/jcm.43.1.348-355.2005

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Metadata

Authors
Noël, C., Dufernez, F., Gerbod, D., Edgcomb, V. P., Delgado-Viscogliosi, P., Ho, L.-C., Singh, M., Wintjens, R., Sogin, M. L., Capron, M., Pierce, R., Zenner, L., & Viscogliosi, E.
Venue
Journal of Clinical Microbiology
Published
2005-01
Volume
43
Issue
1
Pages
348-355
ISSN
  • 0095-1137 (ISSN-L)
  • 1098-660X
OpenAlex
W2008929280
Cited by
268
References
17
FWCI
8.54
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Molecular Phylogenies of Blastocystis Isolates from Different Hosts: Implications for Genetic Diversity, Identification of Species, and Zoonosis. https://app.cochat.ai/papers/10.1128/jcm.43.1.348-355.2005
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Noël, C., Dufernez, F., Gerbod, D., Edgcomb, V. P., Delgado-Viscogliosi, P., Ho, L.-C., Singh, M., Wintjens, R., Sogin, M. L., Capron, M., Pierce, R., Zenner, L., & Viscogliosi, E. (2005). Molecular Phylogenies of Blastocystis Isolates from Different Hosts: Implications for Genetic Diversity, Identification of Species, and Zoonosis. Journal of Clinical Microbiology. https://doi.org/10.1128/jcm.43.1.348-355.2005

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.