Pathogenicity of Entamoeba dispar under xenic and monoxenic cultivation compared to a virulent E. histolytica Patogenicidade de Entamoeba dispar em cultivo polixênico e monoxênico comparada a uma cepa virulenta de E. histolytica
Two xenic isolates and cloned cultures of Entamoeba dispar were submitted to monoxenization using Crithidia fasciculata as the associated organism. Growth in monoxenic cultivation and ability of xenic and monoxenic trophozoites to destroy VERO cells and produce lesions in hamster livers were compare...
Published in: | Revista do Instituto de Medicina Tropical de São Paulo |
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Universidade de São Paulo (USP)
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ftdoajarticles:oai:doaj.org/article:ab989ab40a3a4a08ab089f02dbeff50c 2024-09-09T19:28:27+00:00 Pathogenicity of Entamoeba dispar under xenic and monoxenic cultivation compared to a virulent E. histolytica Patogenicidade de Entamoeba dispar em cultivo polixênico e monoxênico comparada a uma cepa virulenta de E. histolytica Adriana Oliveira Costa Maria Aparecida Gomes Orivaldo Alves Rocha Edward Felix Silva 2006-10-01T00:00:00Z https://doi.org/10.1590/S0036-46652006000500002 https://doaj.org/article/ab989ab40a3a4a08ab089f02dbeff50c EN eng Universidade de São Paulo (USP) http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46652006000500002 https://doaj.org/toc/0036-4665 https://doaj.org/toc/1678-9946 doi:10.1590/S0036-46652006000500002 0036-4665 1678-9946 https://doaj.org/article/ab989ab40a3a4a08ab089f02dbeff50c Revista do Instituto de Medicina Tropical de São Paulo, Vol 48, Iss 5, Pp 245-250 (2006) Entamoeba dispar Entamoeba histolytica Cultivation Pathogenicity Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2006 ftdoajarticles https://doi.org/10.1590/S0036-46652006000500002 2024-08-05T17:49:30Z Two xenic isolates and cloned cultures of Entamoeba dispar were submitted to monoxenization using Crithidia fasciculata as the associated organism. Growth in monoxenic cultivation and ability of xenic and monoxenic trophozoites to destroy VERO cells and produce lesions in hamster livers were compared to those of a virulent E. histolytica. Parental and cloned E. dispar under monoxenic cultivation showed a remarkable lower growth than the monoxenic E. histolytica and were avirulent in both in vivo and in vitro tests. When xenically cultured, trophozoites of E. dispar showed a moderate lytic activity against VERO cells (1.5 to 41.8% of destruction) but caused severe hepatic lesions in hamsters as those caused by the virulent E. histolytica (29 to 100% in prevalence and 0.86 to 4.00 in lesion degree). Although E. dispar has not been associated with invasive disease in men, the ability of xenic trophozoites to produce prominent tissue damage in experimental conditions has indicated that some strains have a considerable pathogenic potential when in presence of bacteria. Dois isolados de Entamoeba dispar em cultivo polixênico e culturas clonadas deles obtidas foram submetidos à monoxenização utilizando Crithidia fasciculata como organismo associado. O crescimento em cultivo monoxênico dos isolados e clones, bem como sua capacidade de destruir células VERO (efeito citopático) e de produzir lesões hepáticas em hamster foram comparados a uma cepa virulenta de E. histolytica. Os trofozoítos de E. dispar em cultivo monoxênico apresentaram um crescimento nitidamente menor que o de E. histolytica e foram avirulentos tanto no teste in vivo quanto in vitro. Entretanto, isolados e clones de E. dispar em cultivo polixênico exibiram uma atividade lítica moderada sobre as células VERO (1,5 to 41,8% de destruição) e causaram lesões hepáticas em hamster (29 a 100% em prevalência e 0,86 a 4,00 no grau de lesão) tão extensas quanto aquelas causadas pela E. histolytica. Embora E. dispar não seja associada à doença invasiva no homem, a ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Revista do Instituto de Medicina Tropical de São Paulo 48 5 245 250 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Entamoeba dispar Entamoeba histolytica Cultivation Pathogenicity Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
spellingShingle |
Entamoeba dispar Entamoeba histolytica Cultivation Pathogenicity Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Adriana Oliveira Costa Maria Aparecida Gomes Orivaldo Alves Rocha Edward Felix Silva Pathogenicity of Entamoeba dispar under xenic and monoxenic cultivation compared to a virulent E. histolytica Patogenicidade de Entamoeba dispar em cultivo polixênico e monoxênico comparada a uma cepa virulenta de E. histolytica |
topic_facet |
Entamoeba dispar Entamoeba histolytica Cultivation Pathogenicity Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Two xenic isolates and cloned cultures of Entamoeba dispar were submitted to monoxenization using Crithidia fasciculata as the associated organism. Growth in monoxenic cultivation and ability of xenic and monoxenic trophozoites to destroy VERO cells and produce lesions in hamster livers were compared to those of a virulent E. histolytica. Parental and cloned E. dispar under monoxenic cultivation showed a remarkable lower growth than the monoxenic E. histolytica and were avirulent in both in vivo and in vitro tests. When xenically cultured, trophozoites of E. dispar showed a moderate lytic activity against VERO cells (1.5 to 41.8% of destruction) but caused severe hepatic lesions in hamsters as those caused by the virulent E. histolytica (29 to 100% in prevalence and 0.86 to 4.00 in lesion degree). Although E. dispar has not been associated with invasive disease in men, the ability of xenic trophozoites to produce prominent tissue damage in experimental conditions has indicated that some strains have a considerable pathogenic potential when in presence of bacteria. Dois isolados de Entamoeba dispar em cultivo polixênico e culturas clonadas deles obtidas foram submetidos à monoxenização utilizando Crithidia fasciculata como organismo associado. O crescimento em cultivo monoxênico dos isolados e clones, bem como sua capacidade de destruir células VERO (efeito citopático) e de produzir lesões hepáticas em hamster foram comparados a uma cepa virulenta de E. histolytica. Os trofozoítos de E. dispar em cultivo monoxênico apresentaram um crescimento nitidamente menor que o de E. histolytica e foram avirulentos tanto no teste in vivo quanto in vitro. Entretanto, isolados e clones de E. dispar em cultivo polixênico exibiram uma atividade lítica moderada sobre as células VERO (1,5 to 41,8% de destruição) e causaram lesões hepáticas em hamster (29 a 100% em prevalência e 0,86 a 4,00 no grau de lesão) tão extensas quanto aquelas causadas pela E. histolytica. Embora E. dispar não seja associada à doença invasiva no homem, a ... |
format |
Article in Journal/Newspaper |
author |
Adriana Oliveira Costa Maria Aparecida Gomes Orivaldo Alves Rocha Edward Felix Silva |
author_facet |
Adriana Oliveira Costa Maria Aparecida Gomes Orivaldo Alves Rocha Edward Felix Silva |
author_sort |
Adriana Oliveira Costa |
title |
Pathogenicity of Entamoeba dispar under xenic and monoxenic cultivation compared to a virulent E. histolytica Patogenicidade de Entamoeba dispar em cultivo polixênico e monoxênico comparada a uma cepa virulenta de E. histolytica |
title_short |
Pathogenicity of Entamoeba dispar under xenic and monoxenic cultivation compared to a virulent E. histolytica Patogenicidade de Entamoeba dispar em cultivo polixênico e monoxênico comparada a uma cepa virulenta de E. histolytica |
title_full |
Pathogenicity of Entamoeba dispar under xenic and monoxenic cultivation compared to a virulent E. histolytica Patogenicidade de Entamoeba dispar em cultivo polixênico e monoxênico comparada a uma cepa virulenta de E. histolytica |
title_fullStr |
Pathogenicity of Entamoeba dispar under xenic and monoxenic cultivation compared to a virulent E. histolytica Patogenicidade de Entamoeba dispar em cultivo polixênico e monoxênico comparada a uma cepa virulenta de E. histolytica |
title_full_unstemmed |
Pathogenicity of Entamoeba dispar under xenic and monoxenic cultivation compared to a virulent E. histolytica Patogenicidade de Entamoeba dispar em cultivo polixênico e monoxênico comparada a uma cepa virulenta de E. histolytica |
title_sort |
pathogenicity of entamoeba dispar under xenic and monoxenic cultivation compared to a virulent e. histolytica patogenicidade de entamoeba dispar em cultivo polixênico e monoxênico comparada a uma cepa virulenta de e. histolytica |
publisher |
Universidade de São Paulo (USP) |
publishDate |
2006 |
url |
https://doi.org/10.1590/S0036-46652006000500002 https://doaj.org/article/ab989ab40a3a4a08ab089f02dbeff50c |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Revista do Instituto de Medicina Tropical de São Paulo, Vol 48, Iss 5, Pp 245-250 (2006) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46652006000500002 https://doaj.org/toc/0036-4665 https://doaj.org/toc/1678-9946 doi:10.1590/S0036-46652006000500002 0036-4665 1678-9946 https://doaj.org/article/ab989ab40a3a4a08ab089f02dbeff50c |
op_doi |
https://doi.org/10.1590/S0036-46652006000500002 |
container_title |
Revista do Instituto de Medicina Tropical de São Paulo |
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48 |
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245 |
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