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Int. J. Environ. Res. Public Health 2010, 7(3), 1105-1120; doi:10.3390/ijerph7031105
Article

Human Amebiasis: Breaking the Paradigm?

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Received: 19 December 2009; in revised form: 2 February 2010 / Accepted: 8 March 2010 / Published: 16 March 2010
(This article belongs to the Special Issue Advances in Epidemiology)
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Abstract: For over 30 years it has been established that the Entamoeba histolytica protozoan included two biologically and genetically different species, one with a pathogenic phenotype called E. histolytica and the other with a non-pathogenic phenotype called Entamoeba dispar. Both of these amoebae species can infect humans. E. histolytica has been considered as a potential pathogen that can cause serious damage to the large intestine (colitis, dysentery) and other extraintestinal organs, mainly the liver (amebic liver abscess), whereas E. dispar is a species that interacts with humans in a commensal relationship, causing no symptoms or any tissue damage. This paradigm, however, should be reconsidered or re-evaluated. In the present work, we report the detection and genotyping of E. dispar sequences of DNA obtained from patients with amebic liver abscesses, including the genotyping of an isolate obtained from a Brazilian patient with a clinical diagnosis of intestinal amebiasis that was previously characterized as an E. dispar species. The genetic diversity and phylogenetic analysis performed by our group has shown the existence of several different genotypes of E. dispar that can be associated to, or be potentiality responsible for intestinal or liver tissue damage, similar to that observed with E. histolytica.
Keywords: human amebiasis; E. histolytica; E. dispar;genetic diversity; phylogeny human amebiasis; E. histolytica; E. dispar; genetic diversity; phylogeny
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Ximénez, C.; Cerritos, R.; Rojas, L.; Dolabella, S.; Morán, P.; Shibayama, M.; González, E.; Valadez, A.; Hernández, E.; Valenzuela, O.; Limón, A.; Partida, O.; Silva, E.F. Human Amebiasis: Breaking the Paradigm? Int. J. Environ. Res. Public Health 2010, 7, 1105-1120.

AMA Style

Ximénez C, Cerritos R, Rojas L, Dolabella S, Morán P, Shibayama M, González E, Valadez A, Hernández E, Valenzuela O, Limón A, Partida O, Silva EF. Human Amebiasis: Breaking the Paradigm? International Journal of Environmental Research and Public Health. 2010; 7(3):1105-1120.

Chicago/Turabian Style

Ximénez, Cecilia; Cerritos, Rene; Rojas, Liliana; Dolabella, Silvio; Morán, Patricia; Shibayama, Mineko; González, Enrique; Valadez, Alicia; Hernández, Eric; Valenzuela, Olivia; Limón, Angélica; Partida, Oswaldo; Silva, Edwards F. 2010. "Human Amebiasis: Breaking the Paradigm?" Int. J. Environ. Res. Public Health 7, no. 3: 1105-1120.



Int. J. Environ. Res. Public Health EISSN 1660-4601 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert