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Studying Cryptosporidium Infection in 3D Tissue-derived Human Organoid Culture Systems by Microinjection

Studying Cryptosporidium Infection in 3D Tissue-derived Human Organoid Culture Systems by Microinjection

Published on: September 14, 2019

Comparative genomics of cryptosporidium.

Aurélien J Mazurie¹, João M Alves, Luiz S Ozaki

¹Department of Microbiology, Montana State University, Bozeman, MT 59717, USA ; Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, VA 23284-2030, USA.

International Journal of Genomics

|June 6, 2013

Summary

Distinct Cryptosporidium species, C. hominis and C. parvum, show conserved genomes. Phenotypic differences likely arise from subtle protein variations at the host-parasite interface, not major genomic changes.

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A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.

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Published on: July 9, 2012

Area of Science:

* Genomics and Parasitology
* Molecular Biology
* Infectious Diseases

Background:

* Cryptosporidium hominis and Cryptosporidium parvum were previously considered a single species.
* These parasites are now recognized as distinct, with differing host ranges, infectivity, and pathogenicity.
* Genome sequencing revealed only 95-97% identity, prompting investigation into genetic variations.

Purpose of the Study:

* To compare genome organization, structure, and gene composition between C. hominis and C. parvum.
* To identify genetic variations responsible for observed phenotypic differences.
* To analyze metabolic pathways and local sequence identity between the two species.

Main Methods:

* Comparative genomics of C. hominis and C. parvum.
* Analysis of genome organization, gene content, and metabolic pathways.
* Assessment of local sequence identity across genes.

Main Results:

* Genomes of C. hominis and C. parvum exhibit remarkable structural and compositional conservation.
* No gross genomic rearrangements, deletions, insertions, or significant metabolic differences were found.
* Phenotypic variations are not attributable to obvious genomic alterations.

Conclusions:

* The conserved nature of the genomes suggests subtle variations are key.
* Phenotypic differences are likely due to minor sequence variations in host-interactive proteins.
* Further research should focus on these subtle protein sequence variations.